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Electroless Copper Plating a Review: Part I
Electroless Copper Plating A Review: Part I By Cheryl A. Deckert Electroless, or autocatalytic, metal plating is a non- necessary components of an electro- electrolytic method of deposition from solution. The less plating solution are the metal salt minimum necessary components of an electroless and a reducing agent. The source of plating solution are a metal salt and an appropriate copper is a simple cupric salt, such as reducing agent. An additional requirement is that the copper sulfate, chloride or nitrate. solution, although thermodynamically unstable, is Various common reducing agents stable in practice until a suitable catalyzed surface is have been suggested7 for use in elec- introduced. Plating is then initiated upon the catalyzed troless copper baths, namely formal- surface, and the plating reaction is sustained by the dehyde, dimethylamine borane, boro- catalytic nature of the plated metal surface itself. This hydride, hypophosphite,8 hydrazine, definition of electroless plating eliminates both those sugars (sucrose, glucose, etc.), and solutions that spontaneously plate on all surfaces dithionite. In practice, however, vir- (“homogeneous chemical reduction”), such as silver tually all commercial electroless cop- mirroring solutions; also “immersion” plating solu- per solutions have utilized formalde- tions, which deposit by displacement a very thin film of hyde as reducing agent. This is a a relatively noble metal onto the surface of a sacrificial, result of the combination of cost, less noble metal. effectiveness, and ease -
THE USE of MIXED MEDIA in the PRODUCTION of METAL ART by Mensah, Emmanuel (B.A. Industrial Art, Metals)
THE USE OF MIXED MEDIA IN THE PRODUCTION OF METAL ART By Mensah, Emmanuel (B.A. Industrial Art, Metals) A Thesis submitted to the School of Graduate Studies, Kwame Nkrumah University of Science and Technology In partial fulfillment of the requirements for the degree of MASTER OF ARTS (ART EDUCATION) Faculty of Art, College of Art and Social Sciences March 2011 © 2011, Department of General Art Studies DECLARATION I hereby declare that this submission is my own work toward the M.A Art Education degree and that, to the best of my knowledge, it contains no materials previously published by another person or material which has been accepted for the award of any other degree of the university, except where due acknowledgement has been made in the text. ……………………………….. ……………………………….. ………………………….. Student’s name & ID Signature Date Certified by ……………………………….. ……………………………….. ………………………….. Supervisor’s Name Signature Date Certified by ……………………………….. ……………………………….. ………………………….. Head of Department’s Name Signature Date ii ABSTRACT The focus of this study was to explore and incorporate various artistic and non artistic media into the production of metal art. The researcher was particularly interested in integrating more non metallic materials that are not traditional to the production of metal art in the decoration, finishing and the protective coating of metal art works. Basic hand forming techniques including raising, chasing and repoussé, piercing and soldering were employed in the execution of the works. Other techniques such as painting, dyeing and macramé were also used. Non metallic media that were used in the production of the works included leather, nail polish, acrylic paint, epoxy, formica glue, graphite, eye pencil, lagging, foam, wood, shoe polish, shoe lace, eggshell paper, spray paint, cotton cords and correction fluid. -
GLOSSARY of PLATING TERMS Acid Gold: a Mildly Acidic Process That Is Used When Plating from 7 to 200 Mils of Gold
GLOSSARY OF PLATING TERMS Acid gold: A mildly acidic process that is used when plating from 7 to 200 mils of gold. The deposits are usually 23kt purity, and it is not usually used as the final finish. Antique: A process which involves the application of a dark top coating over bronze or silver. This coating, either plated or painted, is partially removed to expose some of the underlying metal. Anti-tarnish: A protective coating that provides minimal tarnish protection for a low cost. Barrel plating: A type of mass finishing that takes place in a barrel or tub. Barrel plating is usually requested for very small pieces where pricing must be kept low. Black nickel: A bright or matte, dark plating process that is used to highlight antique finishes. Or, when used as a final color it will range from dark grey to light black. A bright black nickel will yield the darkest color. Bright finish: A high luster, smooth finish. CASS testing: The Copper-Accelerated Acetic Acid Salt Spray test is the same as the Neutral Salt Spray (NSS) test, except it is accelerated, with typical time cycles being 8 and 24 hours. Cold nickel: A non-brightened nickel bath which replicates the original finish, that is, bright areas remain bright and dull areas remain dull. Color: Describes the final top coating (flash) which could be white, silver, 14kt gold (Hamilton), 18kt gold, or 24kt gold (English gold). See "gold flash" and "cyanide gold." Copper: An excellent undercoat in the plating process. Copper provides good conductivity and forms an excellent protective barrier between the base metal and the plate. -
Understanding Gold Plating
Understanding Gold Plating Peter Wilkinson Engelhard Limited, Cinderford, Gloucestershire, United Kingdom For effective operation, gold plating baths must require the mini- mum of attention in respect of replenishment and replacement, and must produce as little sub-standard or reject work as possible. To achieve this, an understanding of the processes involved and the factors affecting them is advantageous. This article attempts to provide such an understanding in a simple manner. Special atten- tion is given to the plating of gold from acid baths containing monovalent gold complexes. The use of gold as a contact material on connectors, Other gold(I) complexes, such as those with thiomalate and switches and printed circuit boards (PCB's) is now well estab- thiosulphate have been considered, but it is doubtful if they lished. There is also an awareness that only gold deposits from will ever find commercial application. acid (pH 3.5-5.0) gold(I) cyanide baths containing cobalt, In terms of electricity consumed, gold(I) baths are more nickel or iron as brightening agents have the appropriate efficient than gold(III) baths. Thus, assuming 100 per cent properties for a contact material. Gold deposits from: pure efficiency, 100 amp-min will deposit 12.25 g of gold from a gold(I) cyanide baths; from such baths containing organic monovalent gold complex, but only 4.07 g from a trivalent gold materials as brightening agents; or from electrolytes containing complex. gold in the form of the gold(I) sulphite complex, do not have Nevertheless, deposition from acid gold(III) cyanide baths the sliding wear resistance which is necessary for make and has merit in the plating of acid resistant substrates such as stain- break connections (1). -
Magnesium Casting Technology for Structural Applications
Available online at www.sciencedirect.com Journal of Magnesium and Alloys 1 (2013) 2e22 www.elsevier.com/journals/journal-of-magnesium-and-alloys/2213-9567 Full length article Magnesium casting technology for structural applications Alan A. Luo a,b,* a Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA b Department of Integrated Systems Engineering, The Ohio State University, Columbus, OH, USA Abstract This paper summarizes the melting and casting processes for magnesium alloys. It also reviews the historical development of magnesium castings and their structural uses in the western world since 1921 when Dow began producing magnesium pistons. Magnesium casting technology was well developed during and after World War II, both in gravity sand and permanent mold casting as well as high-pressure die casting, for aerospace, defense and automotive applications. In the last 20 years, most of the development has been focused on thin-wall die casting ap- plications in the automotive industry, taking advantages of the excellent castability of modern magnesium alloys. Recently, the continued expansion of magnesium casting applications into automotive, defense, aerospace, electronics and power tools has led to the diversification of casting processes into vacuum die casting, low-pressure die casting, squeeze casting, lost foam casting, ablation casting as well as semi-solid casting. This paper will also review the historical, current and potential structural use of magnesium with a focus on automotive applications. The technical challenges of magnesium structural applications are also discussed. Increasing worldwide energy demand, environment protection and government regulations will stimulate more applications of lightweight magnesium castings in the next few decades. -
An Investigation of Bonding Mechanism in Metal Cladding
AN INVESTIGATION OF BONDING MECHANISM IN METAL CLADDING BY WARM ROLLING A Dissertation by WEI YANG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY December 2011 Major Subject: Mechanical Engineering An Investigation of Bonding Mechanism in Metal Cladding by Warm Rolling Copyright 2011 Wei Yang AN INVESTIGATION OF BONDING MECHANISM IN METAL CLADDING BY WARM ROLLING A Dissertation by WEI YANG Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Jyhwen Wang Committee Members, Amine Benzerga Karl Ted Hartwig Ibrahim Karaman Head of Department, Jerald Caton December 2011 Major Subject: Mechanical Engineering iii ABSTRACT An Investigation of Bonding Mechanism in Metal Cladding by Warm Rolling. (December 2011) Wei Yang, B.S., Harbin Institute of Technology; M.S., Harbin Institute of Technology Chair of Advisory Committee: Dr. Jyhwen Wang Clad metals are extensively used for their multi-functionality and their optimal combination of quality and cost. Roll bonding is an effective and economic processing approach to making clad metals. This dissertation presents an experimental investigation of the roll cladding process as well as thermo-mechanical modeling of mechanism for roll bonding of clad metals. The objectives of this research are to investigate the bonding mechanism of dissimilar metals in a warm rolling process and to advance the knowledge of the roll cladding process. To accomplish the objectives, aluminum 1100 sheet (Al 1100) and stainless steel 304 sheet (SST 304) are bonded by warm rolling under controlled conditions. -
Sheet Metal Welding Code
AWS D9.1M/D9.1:2000 An American National Standard Sheet Metal Welding Code Key Words—Sheet metal, arc welding, braze welding, AWS D9.1M/D9.1:2000 joint designs, qualification, workmanship, An American National Standard inspection, base metals, filler metals Approved by American National Standards Institute August 3, 2000 Sheet Metal Welding Code Supersedes ANSI/AWS D9.1-90 Prepared by AWS D9 Committee on Welding, Brazing, and Soldering of Sheet Metal Under the Direction of AWS Technical Activities Committee Approved by AWS Board of Directors Abstract This code covers the arc and braze welding requirements for nonstructural sheet metal fabrications using the commonly welded metals available in sheet form. Requirements and limitations governing procedure and performance qualification are presented, and workmanship and inspection standards are supplied. The nonmandatory annexes provide useful infor- mation on materials and processes. 550 N.W. LeJeune Road, Miami, Florida 33126 Table of Contents Page No. Personnel .................................................................................................................................................................... iii Foreword......................................................................................................................................................................iv Dedication ....................................................................................................................................................................v List of Tables............................................................................................................................................................ -
Trends in Lightweighting with Metal Castings
Trends in Lightweighting With Metal Castings Opportunities for lightweighting with metal castings abound through material choice and smart designs. ANDREW HALONEN, MAYFLOWER CONSULTING LLC Note: This article is based on a presentation the author was scheduled to make at the 2020 Metalcasting Congress in April, which was unfortunately cancelled due to the coronavirus. etal castings are found in almost all industrial markets, and certainly in 4 KEY the transportation business. Cast- ings can be produced in many materials and processes, each offer- ing its uniqueness in properties, in WAYS tolerances and in the ability to seek M efficiencies. Efficiency becomes the ability to design and produce to an LIGHTWEIGHTING WITH optimized shape, minimizing material and post-processing. New tools METAL CASTING IS MET and new foundry techniques, combined with the long-honed skills of the metalcaster, are a winning combination for the future. WITH RESISTANCE Lightweighting is a term that encompasses the task of reducing material to achieve weight reduction. There are motivations to cut weight, just as there Cost is king. is resistance to cut weight. Improving performance and assembly ergonom- ics, reducing part count, and reducing material costs are some of the motiva- System over tions. Yet considering these factors, it does take considerable effort to reduce component. component weight. Changing the Cost Is King supply chain. Low cost usually wins. In ground vehicle transportation, lightweighting activity is constant, yet it is usually delivered as cost neutral. If there is an Other material appetite to cut weight, we often ask, “How much per pound will you pay?” innovations. -
Alloys for Pressure Die Casting RHEINFELDEN ALLOYS
Primary Aluminium Alloys for Pressure Die Casting RHEINFELDEN ALLOYS Table of contents RHEINFELDEN ALLOYS – Aluminium Alloys for Pressure Die Casting General 2 ALUMINIUM RHEINFELDEN group 3 RHEINFELDEN FAST ALLOYS 4 Forms of delivery 5 Customer support and research and development 6 – 7 Aluminium casting alloys by RHEINFELDEN ALLOYS 8 – 9 Profile of the alloys for the die casters 10 Publications Alloys 11 – 20 Castasil ®-37 – AlSi9MnMoZr 21 – 24 Castasil ®-21 – AlSi9Sr 25 – 36 Silafont ®-36 – AlSi10MnMg 37 – 38 Silafont ®-38 – AlSi9MnMgZn 39 – 40 Castaman ®-35 – AlSi10MnMg 41 – 42 Thermodur ®-72/-73 – AlMg7Si3Mn – AlSi11Cu2Ni2Mg2Mn 43 – 53 Magsimal ®-59 – AlMg5Si2Mn Processing datasheets 54 Technical informations / Processing datasheets 55 Castasil ®-37 56 Castasil ®-21 57 Silafont ®-36 58 Silafont ®-38 59 Thermodur ®-72 60 Magsimal ®-59 Technical information 61 – 62 Surface coating 63 Joining techniques for die castings 64 Eight target levels for HPDC 65 Disclaimer and imprint 1 ALUMINIUM RHEINFELDEN group “Progress by tradition” Our policy ALUMINIUM RHEINFELDEN group: This history of aluminium Our RHEINFELDEN ALLOYS GmbH & Co. KG innovative char- in Germany started at Rheinfelden. In 1898 Europe’s first acter is what allows us to adapt rapidly to fast changing market river power station brought about the establishment of the first needs. The agility of a private family owned operated company, aluminium smelter in Germany, at Rheinfelden, Baden. the central geographic location in the European cast metal The company has always operated in three business segments market, the know-how and experience of our team, are factors and in October 2008 restructuring turned ALUMINIUM making a difference for Customers looking for reliable tradition RHEINFELDEN GmbH into a holding company and the former and modern innovation. -
Decorative Metalwork: Design and Manufacture Activity Sheet Having Completed This Project I Will Be Able To; Activity 1
Decorative Metalwork: Design and Manufacture Activity Sheet Having completed this project I will be able to; Activity 1. Create a decorative design using logical steps A design brief is a written statement which outlines a problem and requires you to design a solution. Highlighting the keywords Identify the properties of Copper and Brass. in the brief will help to isolate the most important elements and allow you to focus on finding a suitable solution. Accurately cut and shape sheet metal. Understand when and how to correctly use tin snips Read the design brief given below several times and underline or highlight the key words. Identify some properties of Soft Solder Decorative metalwork has been used for centuries to enhance its surroundings and to show the beauty of highly polished metals. List the steps needed to sweat solder sheet metal. Decorative metalwork can take many forms, from impressive public statues to ornate metal jewellery. Activity 4. Choose one theme, from those listed in activity 3, which you will base Design a decorative artefact, made from a variety of contrasting materials, to enhance a room in your home, school or local club. your final design upon. The artefact should be based on a theme of your choice. Consideration must be given to joining methods, finishing techniques and protection from tarnishing. Inspiration for your design will be received by gathering images associated with the theme. In the box below sketch or stick in images associated with your chosen Activity 2. theme. Images may be sourced from sketching, photographs, books, magazines, Each key word that you have highlighted should now be expanded upon to help you understand how it will impact on your final internet. -
Sheet Metal Tools/HVAC Cutting & Notching Tools
Cutting & Notching Tools – JourneymanTM Snips Offset Snips Additional Features: J2100L, J2101R, J2102S and J2106S snips feature exclusive Klein Kurve® handles for natural hand positioning and ease of use. J2106S Journeyman snips cut 20 gauge J2102S cold rolled steel and 24 gauge stainless steel, with a 2-3/8" length of cut for faster cutting. J2100L, J2101R and J2102S Journeyman snips cut 18 gauge cold rolled steel and 22 gauge stainless steel. Sheet Metal Tools/HVAC J2100L J2101R J2106S Cat. No. Cutting Pattern Snip Type Cutting Length Color Code Overall Length Cutting Capacity: Cold Rolled/Stainless Steel Weight (oz.) J2100L left/straight offset 1-1/4" (32 mm) red/black 9-1/2" (241 mm) 18 gauge/22 gauge 15.5 J2101R right/straight offset 1-1/4" (32 mm) green/black 9-1/2" (241 mm) 18 gauge/22 gauge 15.7 J2102S straight/wide curves offset 1-1/2" (38 mm) yellow/black 9-1/2" (241 mm) 18 gauge/22 gauge 15.5 J2106S straight/wide curves long cut offset 2-3/8" (60 mm) yellow/black 10-1/2" (266 mm) 20 gauge/24 gauge 18.2 Cutting & Notching Tools HVAC Aviation Snips – Regular/Offset/Bulldog Forged and heat-treated steel blades for strength and durability. Regular and offset blades have the capacity of cutting 18 gauge cold-rolled sheet metal and 22 gauge stainless steel sheet metal. Offset blades provide ease of cutting tight curves and keep user’s hand away from metal. 2101R Bulldog snips (Cat. No. 2103) for notching or trimming 16 gauge cold-rolled sheet metal and 18 gauge stainless steel sheet metal. -
Metal Etching 101 #68-007-16 Etching Is a Method of Using Chemicals to Cut a Design Or Pattern Into Types of Resists a Metal Surface
Metal Etching 101 #68-007-16 Etching is a method of using chemicals to cut a design or pattern into Types of Resists a metal surface. Etching your own designs into metal is easier than it A resist is what you use to protect certain parts of your metal from the may sound, and it can be a fun and rewarding way to make your own etchant. Resists are typically inks (and tapes). You will apply a design jewelry! Learn the basics of how to choose your metals, choose your or pattern to the metal with your resist. Then, when you dip your etchants, create or transfer your images with resists, and complete the metal into the chemical bath, the covered areas will “resist” being eaten etching process. Discover how to make a float boat for suspending away. Those covered areas will be the high points of your design once your designs in etchant — plus find basic etching safety precautions, the etching process is complete. design considerations, and project ideas. Different artisans use different resists, and different resists work better with different aesthetic styles and methods — for example using rubber stamps, making a photo transfer, drawing by hand, etc. With practice and experimentation you’ll figure out which mediums and methods you prefer, too. Resists that work on copper, brass, and nickel silver include: • StazOn® & Perfect Medium™ Ink Pads work great to add rubber Rubber-stamp designs etched into sheet metal. stamp designs to metal. StazOn Cleaner allows you to removed What Metals can be Etched? smudged immpressions and start over till the image comes out to Because chemical etching actually cuts into the surface of the metal, StazOn® & Perfect your satisfaction.