DOCSLIB.ORG

Low-Cycle Fatigue and Fracture Behavior of Aluminized Stainless Steel AISI 321 for Solar Thermal Power Generation Systems

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Low-Cycle Fatigue and Fracture Behavior of Aluminized Stainless Steel AISI 321 for Solar Thermal Power Generation Systems metals Article Low-Cycle Fatigue and Fracture Behavior of Aluminized Stainless Steel AISI 321 for Solar Thermal Power Generation Systems Wei Li 1,2, Lei Yang 1,2, Cong Li 1,2,*, Huitao Chen 1,2, Lu Zuo 1,2, Yide Li 1,2, Jian Chen 1,2, Jianjun He 1,2 and Sheng-de Zhang 3 1 Key Laboratory of Efficient & Clean Energy Utilization, School of Energy and Power Engineering, Changsha University of Science & Technology, Changsha 410114, China; [email protected] (W.L.); [email protected] (L.Y.); [email protected] (H.C.); [email protected] (L.Z.); [email protected] (Y.L.); [email protected] (J.C.); [email protected] (J.H.) 2 Department of Smart Grid, Hunan Province 2011 Collaborative Innovation Center of Clean Energy Institute, Changsha 410114, China 3 Japan Electric Power Central Research Institute, Tokyo 240-0196, Japan; [email protected] * Correspondence: [email protected]; Tel.: +86-137-8615-9450 Received: 27 July 2020; Accepted: 10 August 2020; Published: 12 August 2020 Abstract: The microstructure, low-cycle fatigue property, and fracture behavior of as-received and aluminized steel were investigated at room temperature, respectively. The results reveal that the aluminized layer is mainly composed of three layers: (I) the external Al2O3 layer, (II) the transition Fe-Al mesophase layer, and (III) the diffusion layer with AlFe and AlCrFe phase. The microhardness of as-received steel lower than that of aluminized steel until the distance from aluminized layer is greater than 150 µm. Compared to the original steel, the aluminized steel exhibits lower stress amplitude and fatigue life, which is correlated to the surface integrity. According to the Coffin-Manson relationship, the fatigue-ductility coefficients for as-received and aluminized steel is 4.347 and 3.528, respectively. Fractographic analysis reveals that the fatigue cracks tend to nucleate at the coating and propagate through the grain boundaries apace. Keywords: low-cycle fatigue; aluminized steel; surface integrity; fracture behavior 1. Introduction With the shortage of conventional fossil resource, the innovation of renewable energy sources has been facilitated by the increase of energy consumption unprecedentedly, which has attracted considerable interest [1]. Solar energy, as a major alternative energy sources, takes a large proportion in the total energy of the world [2]. There are two methods used for obtaining the solar energy. One is solar photovoltaic (PV) power generation and the other is concentrated solar thermal power (CSP) [3]. The latter is found to act as an important role in meeting national energy demands and reducing greenhouse gas emissions [4]. With the advantages of being relatively low cost and low emissions, CSP is more suitable to acquire stable dispatchable electrical output as compared to PV-based generation, especially in the application of utility-scale installations larger than 100 MW [5]. However, the interaction of thermal cyclic, mechanical stress and corrosion in heat transfer fluid medium would generate detrimental effect and accelerate the failure of heat exchange tube material [6–9], leading to an increase in the expenditure of maintenance. Therefore, it is very urgent to consider the mechanical strength of the materials as well as their capability against the environmental influence. AISI 321, a Ti-stabilized grade of austenitic stainless steel, is widely used as vital structural component material in CSP system, such as piping, heat exchangers, and receivers [10–12]. Whereas with Metals 2020, 10, 1089; doi:10.3390/met10081089 www.mdpi.com/journal/metals Metals 2020, 10, 1089 2 of 17 the application of diverse phase transformation heat storage materials, such as molten metal in which stainless steel is corroded seriously, it is inevitable for stainless steel to be refined and meet higher requirements in corrosion resistance. Therefore, it is extremely essential to develop an efficient and reliable coating for the structures of CSP system. Al2O3/Fe-Al coating is considered to achieve superior oxidation and corrosion resistance [13]. Different approaches such as chemical vapor deposition (CVD) [14], hot dip aluminizing [15], electrolytic deposition, and pack aluminizing [16] are adopted to prepare the aluminized layer. Among them, pack aluminizing is more prominent due to the cheap price and easy forming with different shapes and sizes [17]. The heat exchange tube material is mainly subjected to low cycle fatigue (LCF) loads under working condition. However, coating microstructure has an important effect on the fatigue performance of the steel. Mušálek R. [18] investigated the influence of Fe-Al coating prepared by plasma spraying on the fatigue behavior of low carbon steel, and found that the fatigue cracks initiated at coating-substrate interface and grew by striation mechanism. Additionally, several authors pointed out that the intrasplat cracking, decohesion, and the poor bonding ability of Al2O3 and Fe3Al would accelerate the fracture of material [19,20]. Furthermore, the surface integrity is of significance to the LCF life. Gun [21] investigated the effects of TiN coating on the fatigue life of AISI D2 tool steel and demonstrated that the fatigue limit was considerably related with the surface integrity. Moreover, many researchers reported that an increased microhardness can improve the LCF life [22–25]. However, there is still a shortage of systematical analyses about the interaction between microstructure and fatigue behavior in aluminized steel. Therefore, the microstructural evolution of aluminide coating and its effects on the LCF property are studied in this paper. The paper is organized as follows. Section2, after the aluminized steel is prepared, static tensile and LCF tests are conducted at room temperature. Subsequently, the microstructure, tensile property, surface integrity, hysteresis loops, cyclic stress response, and LCF life of aluminized steel are presented and compared with base metal in Section3. In the same section, the fatigue fractographic of these materials were observed using scanning electron microscopy (SEM). In Section4, the microstructure evolutions during pack aluminizing are discussed. Finally, the e ffective fatigue stress concentration and the degree of hardening for both steel are calculated. 2. Materials and Methods The nominal compositions of the stainless-steel (grade AISI 321) are shown in Table1. Test specimens were cut from the as-received slab and ground to 2000-grit SiC paper. They were rinsed with ethanol, and dried before aluminizing. Pieces of samples were completely embedded in the aluminizing agent, which is composed of 68 wt. % Fe-Al powder, 30 wt. % Al2O3 filler, and 2 wt. % NH4Cl activator, and then filled into a heat-proof stainless-steel container. The container was heated to 500 ◦C for 30 min primarily, and then elevated to 950 ◦C for 12 h at a heating rate of 10 ◦C/min, finally cooled to the room temperature in the air. Table 1. Chemical composition of 321 austenitic stainless steels. Element C Si Mn P S Cr Ni N Ti wt. % 0.035 0.38 1.08 0.028 0.003 17.02 9.06 0.045 0.22 All mechanical tests were performed on RDL05 electronic creep fatigue testing machine (Changchun Research Institute for Testing Machines, Changchun, China), equipped with 50 KN load cell. Static tensile tests and LCF tests were conducted at room temperature, using samples of 25 mm gauge length and 4 mm 8 mm sectional dimension as shown in Figure1. Tensile tests were × 3 1 implemented at a strain rate of 10− s− . LCF tests were carried out at a constant cyclic frequency of 0.2 Hz and the load ratio was R = 1. LCF tests were performed at total strain amplitudes of 0.3–0.8%. − All strain was measured by mounting extensometer. MetalsMetals 20202020,, 1010,, 1089x FOR PEER REVIEW 33 ofof 1717 Metals 2020, 10, x FOR PEER REVIEW 3 of 17 Figure 1. Schematic diagram of samples for tensile and fatigue tests, mm. Figure 1. SchematicSchematic diagram diagram of of samples samples for for tensile tensile and and fatigue fatigue tests, mm. The aluminized coatings were characterized by A TD3000 X-ray diffractometer (XRD, Dandong The aluminized coatings were characterized by A TD3000 X-ray diffractometer (XRD, Dandong TongdaThe aluminizedTechnology coatingsCo. Ltd, were Dandong, characterized China). by The A TD3000surface X-rayroughness diffractometer was measured (XRD, Dandongby JB-4C Tongda Technology Co. Ltd, Dandong, China). The surface roughness was measured by JB-4C Tongdaprecision Technology roughness testerCo. Ltd, and Dandong,3D surface China). profiles Thewere surface observed roughness through thewas VHX-1000 measured super-deep by JB-4C precision roughness tester and 3D surface profiles were observed through the VHX-1000 super-deep precision3D microscopic roughness system tester (Yalien and 3DInstitute surface of profilesMechanic wereal and observed Electrical through Technology, the VHX-1000 Beijing, super-deepChina). The 3D microscopic system (Yalien Institute of Mechanical and Electrical Technology, Beijing, China). 3Dmicro-hardness microscopic system was tested (Yalien with Institute a 410MVA of Mechanic Vickersal micro-hardness and Electrical Technology, tester (Laizhou Beijing, Huayin China). Institute The The micro-hardness was tested with a 410MVA Vickers micro-hardness tester (Laizhou Huayin Institute micro-hardnessfor Testing Instrument, was tested Laizhou, with a China) 410MVA using Vickers a load micro-hardness of 300 g and hold tester time (Laizhou of 15 s. HuayinFracture Institute surfaces for Testing Instrument, Laizhou, China) using a load of 300 g and hold time of 15 s. Fracture surfaces of forof theTesting fatigue Instrument, tested samples Laizhou, were China) examined using by a load Quanta of 300 2000 g and environment hold time SEMof 15 (FEI,s. Fracture Hillsboro, surfaces OR, the fatigue tested samples were examined by Quanta 2000 environment SEM (FEI, Hillsboro, OR, USA). ofUSA). the fatigue tested samples were examined by Quanta 2000 environment SEM (FEI, Hillsboro, OR, USA).3. Results 3. Results 3.3.1. Results Microstructure Characterization and Tensile Property 3.1. Microstructure Characterization and Tensile Property 3.1.
Load more

Recommended publications
  • (UHFSS) Welded 409 Stainless Steel Heat Exchanger Tubing
    Cost Reductions and Product Consistency Improvements Using Unannealed High- Frequency/Solid State (UHFSS) Welded 409 Stainless Steel Heat Exchanger Tubing BY Edward D. Basta, Senior Metallurgical Engineer Atlas Steel Products Co. 7990 Bavaria Road Twinsburg, OH 44087 USA (330) 425-1600 (330) 425-1611 E-Mail: [email protected] Web Site: http://www.atlassteel.com Edward D. Basta Atlas Steel Products Co. Page 2 ABSTRACT BACKGROUND Competitive markets for Commercial and residential commercial and residential HVAC HVAC systems have evolved over the systems are demanding higher quality years from using predominantly and safer, longer lasting products. Due "clamshell" heat exchanger components to increased global competition, HVAC to the more efficient and cost effective system dealers and end users also tubular heat exchanger. Figure 1 shows demand competitive prices and longer a typical tubular heat exchanger unit. warranties. The common experience of coated carbon steel heat exchangers that suffer corrosion failures in less than ten years will be unacceptable. HVAC manufacturers must find ways to meet both performance and pricing expectations. The progressive HVAC manufacturer is transitioning to stainless steel tubular heat exchangers for longer service life. However, the higher costs of annealed tungsten-inert gas (TIG) or laser-welded ferritic stainless steel heat exchanger tubing have forced many manufacturers out of this price-sensitive market. These less productive (lower Figure 1: Tubular Heat Exchanger fpm) tube welding processes and an additional post-weld annealing step The materials used for both contribute to the higher costs of clamshell and tubular heat exchangers stainless steel tubing. have progressed from basic uncoated or This presentation will introduce a epoxy-painted plain carbon steels to lower cost, high quality alternative to hot-dip aluminized coated steels.
    [Show full text]
  • Charlesbaldwin
    ADVANCES IN HIGH PERFORMANCE ENAMELS 3 XXI International Enamellers Congress Advances in High Performance Enamels Charles Baldwin1 1 Ferro Corporation, 4150 E. 56th Street, Cleveland, OH 44105 USA Introduction A modern kitchen with a pans and a range provides a good overview of recent improvements in porcelain enamels. The key attributes of environmental-friendliness, mechanical toughness, thermal resistance, cost effectiveness, and efficiency keep enamels competitive with other materials and lead to the creation of new applications and technologies. Aluminum and Aluminized Steel Cookware With good scratch and heat resistance, aluminum enamels are widely used on the exterior of pots and pans. These are based on frits with a relatively low glass temperature and high thermal expansion that is compatible with the approximately 590°C (1100°F) melting point and 24×10-6/K linear expansion of aluminum alloys. The original low-temperature frits contained about 25-40% lead oxide as flux. Recent increases in environmental and regulatory scrutiny such as the European Union Restriction of Hazardous Substances (RoHS) Directive are making the use of toxic substances even in an indirect food contact environment unacceptable. The solution to the lead content was to replace it with about 8-12% vanadium pentoxide as a flux, but this material also has toxicity issues. Due to volatility in commodities prices, the vanadium pentoxide has been reduced to 1% or less. Cadmium-free red colors as well as metallics1 have also been developed for cookware to catch the consumer’s eye on the shelf. An example of a lead-free, low-vanadium, cadmium-free cookware set is shown in Fig.
    [Show full text]
  • Corrosion Guidelines (PDF)
    California Department of Transportation Division of Engineering Services Materials Engineering and Testing Services Corrosion Branch CORROSION GUIDELINES Version 3.2 MAY 2021 Corrosion Guidelines MAY 2021 Version 3.2 NOTICE The contents of this document reflect the views of Materials Engineering and Testing Services which is responsible for the facts and the accuracy of the guidelines presented herein. The contents do not necessarily reflect the official views or policies of the State of California or the Federal Highway Administration. These guidelines do not constitute a standard, specification, or regulation. Neither the State of California nor the United States Government endorses products or manufacturers. Trade or manufacturers’ names appear herein only because they are considered essential to the object of this document. Comments on these Corrosion Guidelines should be directed to: Steve Seifert, Senior Corrosion Branch via e-mail [email protected] or via US Mail California Department of Transportation Materials Engineering and Testing Services Corrosion Branch 5900 Folsom Blvd., Sacramento, CA 95819 i Corrosion Guidelines MAY 2021 Version 3.2 TABLE OF CONTENTS 1. INTRODUCTION ....................................................................................................................... 1-1 2. THE DEPARTMENT’S FUNCTIONAL GROUPS ASSISTING WITH CORROSION INVESTIGATIONS .................................................................................................................... 2-1 3. REQUIREMENTS FOR CONSULTANTS
    [Show full text]
  • Development of New Corrosion/Abrasion Guidelines For
    Report No. CDOT-2009-11 Final Report DEVELOPMENT OF NEW CORROSION /ABRASION GUIDELINES FOR SELECTION OF CULVERT PIPE MATERIALS Albert Molinas, Amanullah Mommandi November 2009 COLORADO DEPARTMENT OF TRANSPORTATION DTD APPLIED RESEARCH AND INNOVATION BRANCH The contents of this report reflect the views of the author(s), who is(are) responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views of the Colorado Department of Transportation or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient's Catalog No. CDOT-2009-11 4. Title and Subtitle 5. Report Date DEVELOPMENT OF NEW CORROSION/ABRASION November 2009 GUIDELINES FOR SELECTION OF CULVERT PIPE MATERIALS 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. Albert Molinas and Amanullah Mommandi CDOT-2009-11 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Colorado State University and Hydrau-Tech, Inc. Daryl B. Simons Research Center, Foothills Campus 11. Contract or Grant No. Fort Collins, CO 80523 106.00 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered Colorado Department of Transportation - Research 4201 E. Arkansas Ave. 14. Sponsoring Agency Code Denver, CO 80222 15. Supplementary Notes Prepared in cooperation with the US Department of Transportation, Federal Highway Administration 16. Abstract In this research effort, literature surveys and reviews of the current methodologies employed by various state DOTs were conducted. The literature survey identified the pertinent parameters in estimating the service life of various pipe materials.
    [Show full text]
  • Aluminised Steel Type 2
    Aluminised Steel Type 2 Product Description/ Specification: Aluminized Steel Type 2 was developed for superior environmental corrosion resistance. Type 2 combines the strength of a steel substrate with the corrosion resistance of aluminium. Aluminized Steel Type 2 is produced by continuous hot-dip coating of steel strip in a bath of molten, commercially pure aluminium. Cleaning the strip in a non-oxidizing/reducing furnace atmosphere assures a pristine surface for coating adherence. Interaction of molten aluminium with the steel surface produces a metallurgical bond and provides superior corrosion protection. The coating has a uniform thickness on both sides of the material. The coating microstructure is comprised of two layers: an aluminium layer and an underlying hard aluminium-iron intermetallic alloy layer. The alloy arises from interaction of molten, commercially pure aluminium with the steel surface and is the agent that bonds the coating to the substrate. Coating Thickness: (ASTM A463) Types T2-100 g/m2 (Minimum) 300 Minimum coating Thickness (μm) 95 (Total both sides) Dimensions: Standard Widths Supplied are: 36’’ (914 mm) and 48 ‘’ ( 1219 mm) these are supplied as coil but can also be supplied either standard lengths or custom produced to required lengths - maximum 12 ft (3658 mm) subject to thickness. Other widths are available upon request. Benefits: Corrugated roofing and siding, grain bins, drying ovens, and air-conditioner condenser housings. Safety: There are no known health risks in handling the material although it is recommended that gloves should be worn. Local health and safety guidelines should be followed when loading and transhipping coils and all maximum loading weights adhered to.
    [Show full text]
  • Steel Processes
    OVERVIEW OF STEEL PROCESSES STEEL MANUFACTURING, TESTING AND PRODUCTS WHAT IS A METAL/STEEL? Metal: An element whose electrons* aren’t bound to particular atoms and have a partially filled valence band. Valance Band Nucleus (contain neutrons, protons) Diagram of an Atom Orbital Electrons (filled ‘rings’) Steel: Iron + Carbon (usually less than 1%) A hard, strong, gray or bluish-gray alloy of iron with carbon and usually other elements, used extensively as a structural and fabricating material. *’Free electrons in outer ring (valance) are free to move throughout metal – that’s why metals conduct heat, electricity. 2 WHAT IS MICROSTRUCTURE? Microstructure – The fine structure of materials (in a metal or other material), such as, type, size and arrangement of grains that determine material properties, which can be made visible at 100x+ magnification and examined with a microscope. Microstructure can help Types of Microstructure predict the behavior and/or failure in certain conditions of a component made of a Ferrite: BCC - Iron (Fe) (low solubility for Carbon). particular material. Cementite: Iron Carbide (Fe3C). Pearlite: Two phase microstructure composed of Ferrite and Cementite forms at 1000F-1341F (one goal of annealing, the cementite spheroidizes). Austenite: Present at temperatures above 1414F; high solubility of carbon (100x greater than ferrite). Martensite: Formed when austenitic steel is rapidly cooled preventing diffusion of carbon (like a supersaturated solution). Bainite: Consists of Ferrite and Cementite forms at lower temp
    [Show full text]
  • Study on the TIG Welding Technology of the Aluminized Steel Bixin Guo
    International Conference on Materials, Environmental and Biological Engineering (MEBE 2015) Study on the TIG Welding Technology of the Aluminized Steel Bixin Guo1,a , Xiaowei Du1,b 1118 mail box, The First Aeronautic Institute of Air Force , Xinyang city,Henan Prov.464000 [email protected] ,[email protected] Keywords: Aluminized steel; TIG welding; Technology; Welding joint Abstract.The welding property of the Aluminized steel is analyzed in this article, TIG welding technology of Aluminized steel is presented on the base of mass experimentations, it proves that this technology can effectively prevent the welding crack and improve the property of the weld joint. Introduction Aluminized steel is a new type composite steel material which has been penetrated by 0.10~0.5mm aluminum on its surface. [1] The material’s surface is comprised of a compact thin film of Al2o3, which has high melting point. The junction of interior material and the base material is ferroaluminium structure. So aluminized steel has excellent oxidation resistance property under high temperature and very good H2S, SO2, SO3 resistance property and anti-friction property, and has been utilized in petroleum, chemical and aeronautical industries. In practice, we often encounter the welding difficulty of aluminized steel pipe and flange plate ( the pipe is made of Cr5Mo aluminized steel, and the flange plate is made of 45 steel which has been aluminized.). When arc welding is adopted, crack could be found in the adjacent of the welding joint, and also the corrosion resistance of that part would drop down. The welding joint type is shown in Fig 1.
    [Show full text]
  • Report Prepared by
    Report Prepared by: Alberto A. Sagüés Noreen D. Poor Leonardo Cáseres Mersedeh Akhoondan FINAL REPORT DEVELOPMENT OF A RATIONAL METHOD FOR PREDICTING CORROSION RATES OF METALS IN SOILS AND WATERS Contract No. BD497 Final Report to Florida Department of Transportation A. A. Sagüés Principal Investigator Department of Civil and Environmental Engineering University of South Florida Tampa, FL 33620 October 31, 2009 Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient's Catalog No. BD497 4. Title and Subtitle 5. Report Date DEVELOPMENT OF A RATIONAL METHOD FOR PREDICTING October 31, 2009 CORROSION RATES OF METALS IN SOILS AND WATERS 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. A. A. Sagüés, N. D. Poor, L. Cáseres, M. Akhoondan 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Department of Civil and Environmental Engineering University of South Florida 11. Contract or Grant No. Tampa, FL 33620 BD497 12. Sponsoring Agency Name and Address 13. Type of Report and Period Florida Department of Transportation Covered 605 Suwannee St. MS 30 Final Report Tallahassee, Florida 32399 (850)414-4615 14. Sponsoring Agency Code 15. Supplementary Notes 16. Abstract Methods used by the Florida Department of Transportation for predicting corrosion rates of metallic piling, anchors, and metallic drainage pipe used in highway construction were examined and updates were proposed as needed. Pile and anchor procedures were found to be generally adequate, with caution on the possibility of enhanced underground corrosion and new modalities of microbiologically induced corrosion. Special attention was given to the case of aluminized steel drainage pipe due to recent cases of extensive premature corrosion of spiral-ribbed pipes made of that material.
    [Show full text]
  • Coating Prospects in Corrosion Prevention of Aluminized Steel and Its Coupling with Magnesium
    University of Windsor Scholarship at UWindsor Electronic Theses and Dissertations Theses, Dissertations, and Major Papers 10-19-2015 Coating Prospects in Corrosion Prevention of Aluminized Steel and Its Coupling with Magnesium Fuyan Sun University of Windsor Follow this and additional works at: https://scholar.uwindsor.ca/etd Recommended Citation Sun, Fuyan, "Coating Prospects in Corrosion Prevention of Aluminized Steel and Its Coupling with Magnesium" (2015). Electronic Theses and Dissertations. 5455. https://scholar.uwindsor.ca/etd/5455 This online database contains the full-text of PhD dissertations and Masters’ theses of University of Windsor students from 1954 forward. These documents are made available for personal study and research purposes only, in accordance with the Canadian Copyright Act and the Creative Commons license—CC BY-NC-ND (Attribution, Non-Commercial, No Derivative Works). Under this license, works must always be attributed to the copyright holder (original author), cannot be used for any commercial purposes, and may not be altered. Any other use would require the permission of the copyright holder. Students may inquire about withdrawing their dissertation and/or thesis from this database. For additional inquiries, please contact the repository administrator via email ([email protected]) or by telephone at 519-253-3000ext. 3208. Coating Prospects in Corrosion Prevention of Aluminized Steel and Its Coupling with Magnesium By Fuyan Sun A Thesis Submitted to the Faculty of Graduate Studies through the Department of Mechanical, Automotive and Materials Engineering in Partial Fulfillment of the Requirements for the Degree of Master of Applied Science at the University of Windsor Windsor, Ontario, Canada 2015 © 2015 Fuyan Sun Coating prospects in corrosion prevention of aluminized steel and its coupling with magnesium by Fuyan Sun APPROVED BY: ______________________________________________ Jichang Wang Department of Chemistry&Biochemistry ______________________________________________ J.
    [Show full text]
  • Corrosion Evaluation and Durability Estimation of Aluminized Steel Drainage Pipes Mersedeh Akhoondan University of South Florida, [email protected]
    University of South Florida Scholar Commons Graduate Theses and Dissertations Graduate School January 2012 Corrosion Evaluation and Durability Estimation of Aluminized Steel Drainage Pipes Mersedeh Akhoondan University of South Florida, [email protected] Follow this and additional works at: http://scholarcommons.usf.edu/etd Part of the Civil Engineering Commons, and the Materials Science and Engineering Commons Scholar Commons Citation Akhoondan, Mersedeh, "Corrosion Evaluation and Durability Estimation of Aluminized Steel Drainage Pipes" (2012). Graduate Theses and Dissertations. http://scholarcommons.usf.edu/etd/4273 This Dissertation is brought to you for free and open access by the Graduate School at Scholar Commons. It has been accepted for inclusion in Graduate Theses and Dissertations by an authorized administrator of Scholar Commons. For more information, please contact [email protected]. Corrosion Evaluation and Durability Estimation of Aluminized Steel Drainage Pipes by Mersedeh Akhoondan A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy Department of Civil and Environmental Engineering College of Engineering University of South Florida Major Professor: Alberto A. Sagüés, Ph.D. Delcie Durham, Ph.D. Yusuf Emirov, Ph.D. Xiao Li, Ph.D. Gray Mullins, Ph.D. Rajan Sen, Ph.D. Date of Approval: October 22, 2012 Keywords: Culverts, Service Life, Limestone Backfill, Natural Waters, Coating Copyright © 2012, Mersedeh Akhoondan DEDICATION This work is dedicated to: My best friend and soul mate, Emir Modarres, who has accompanied me through all the ups and downs of my life and without his unconditional love and support this work would not be possible. My dear parents, Ali Akhoondan and Dr.
    [Show full text]
  • Aluminized Type 1 STEELS
    P R O D U C T D A T A B U L L E T I N Aluminized Type 1 STEELS PRODUCT FEATURES Aluminized Steel Type 1 is continuously hot dip coated on Corrosion Resistance both sides with an aluminum/ silicon alloy coating. The hot dip Aluminized Steel Type 1 has superior performance process, pioneered by AK Steel, compared to zinc coated materials for resistance to provides a tight metallurgical atmospheric, salt spray and muffler condensate bond between the steel and the alloy coating. This process corrosion. results in a material with the strength of steel plus the corro- Formability sion protection of aluminum, Aluminized Steel Type 1 can be used to produce parts and the synergistic heat protec- tion of an aluminum/silicon alloy. containing simple bends to parts with extreme deep AK Steel’s #4 Aluminized drawing requirements. line is the most productive aluminizing line in the world. Heat Reflectivity The primary features of this line Aluminized Steel Type 1 has excellent heat reflectivity include a ceramic coreless ° induction coating pot, the ability during exposures to temperatures below 800 F to finish with either air or (427°C), reflecting up to 80% of the radiant heat that nitrogen, closed-loop computer impinges upon it. controlled X-ray gauges for coating weights, and in-line surface conditioning. High Temperature Properties Aluminized Steel Type 1 is an excellent heat resistant material effective to at least 1250°F (677°C). For applications above 800°F (427°C) where alloying of the coating can be a problem, AK Steel’s DQHT grade has been specially formulated to resist alloying at temperatures up to 1000°F (538°C).
    [Show full text]
  • A Comparative Study of Non-Ferrous Coatings on Steel
    A COMPARATIVE STUDY OF NON-FERROUS COATINGS ON STEEL A. N. KAPOOR, A. B. CHATTERJEA & B. R. NIJHAWAN National Metallurgical Laboratory, Jamshedpur Abstract of hydro-electric projects and especially the setting up of the proposed 16,000 tons Considerable tonnages of zinc and tin are import- aluminium reduction plant at Hirakud, ed annually to meet the demands of galvanizing and tinning industries. Keeping in view the large quantities of commercial aluminium availability of raw materials in India, the possi- should be available, and much interest there- bilities of using aluminized steel are discussed. A fore applies to the suitability of aluminium comparison of the micro-structures obtained in for coating steel. different hot-dip processes for protection of steel It has already been established that a surfaces and of the resistance of the coated pro- ducts to corrosion is given. Points in favour of coating of aluminium on steel makes the aluminium-coated steel have been brought out. metal more resistant to heat and to atmo- spheric corrosion. Under many conditions, an aluminium coating on steel, like a zinc Introduction coating, affords galvanic or electrolytic pro- T HE annual consumption; of zinc and tection on bare spots, that is, through anodic tin in India amounts to nearly 30,000 sacrificial attack reduces the corrosive attack and 60,000 tons respectively, though of the exposed steel base metal which acts their indigenous production is almost negli- as the cathode. Zinc coatings, at high gible. The only source of zinc in India is ambient temperatures and humidities, e.g. the Zawar Mines, Udaipur.
    [Show full text]