DOCSLIB.ORG

Formation of PEO Coatings in the “Soft” Regime Conditions

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Formation of PEO Coatings in the “Soft” Regime Conditions Study of the micro-discharges / metallic surfaces interactions for a better understanding of the growth mechanisms within the PEO process Vitalios Ntomprougkidis To cite this version: Vitalios Ntomprougkidis. Study of the micro-discharges / metallic surfaces interactions for a better understanding of the growth mechanisms within the PEO process. Plasma Physics [physics.plasm-ph]. Université de Lorraine, 2020. English. NNT : 2020LORR0077. tel-02961871 HAL Id: tel-02961871 https://hal.univ-lorraine.fr/tel-02961871 Submitted on 8 Oct 2020 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. AVERTISSEMENT Ce document est le fruit d'un long travail approuvé par le jury de soutenance et mis à disposition de l'ensemble de la communauté universitaire élargie. Il est soumis à la propriété intellectuelle de l'auteur. Ceci implique une obligation de citation et de référencement lors de l’utilisation de ce document. D'autre part, toute contrefaçon, plagiat, reproduction illicite encourt une poursuite pénale. Contact : [email protected] LIENS Code de la Propriété Intellectuelle. articles L 122. 4 Code de la Propriété Intellectuelle. articles L 335.2- L 335.10 http://www.cfcopies.com/V2/leg/leg_droi.php http://www.culture.gouv.fr/culture/infos-pratiques/droits/protection.htm UNIVERSITE DE LORRAINE Ecole Doctorale : Chimie – Mécanique – Matériaux - Physique Institut Jean Lamour Département Chimie et Physique des Solides et des Surface THESE Soutenue le 15 Juillet 2020 Pour obtenir le grade de Docteur de l’Université de Lorraine Spécialité : Physique – Physique des plasmas et applications par Vitalios NTOMPROUGKIDIS Etude de l'interaction micro-décharges / surfaces métalliques pour une meilleure compréhension des mécanismes de croissance lors du procédé PEO (Titre en anglais) Study of the micro-discharges / metallic surfaces interactions for a better understanding of the growth mechanisms within the PEO process Jury Rapporteurs ARURAULT Laurent Professeur, CIRIMAT, Université de Toulouse LAVISSE Luc Maître de conférences, ICB, Université de Bourgogne Examinateurs CHAMPEAUX Corinne Professeure, IRCER, Université de Limoges BESLAND Marie-Paule Directrice de recherche, IMN, Université de Nantes VEYS-RENAUX Delphine Maître de conférences, IJL, Université de Lorraine Directeur de thèse HENRION Gérard Directeur de recherche, IJL, Université de Lorraine Co-directeur MARTIN Julien Maître de conférences, IJL, Université de Lorraine Acknowledgements Acknowledgements First of all, I would like to express my sincere gratitude to my supervisor, Gérard Henrion, for accepting me in this project, for putting his trust and belief in my capability to carry out this research. I am grateful for his guidance, mentorship and support during these three years, from which I have learned a lot. One could not ask for a better supervisor. Thank you very much. I would also like to thank my co-supervisor, Julien Martin, with whom we had an excellent collaboration conducting all the experiments of this work. For his guidance and tutoring on experimental procedures, for all our discussions analysing our results and all the advices he provided on multiple occasions. A very special thanks to Alexandre Nominé for all the work we have done together, particularly for the discussions we had and his scientific advices and help. It was a real pleasure to share an office in a very friendly and enjoying environment both professionally and personally. I would like to acknowledge the members of the CC3M competence cluster for their contributions in this work. I am thankful to Sandrine Mathieu and Christine Gendarme for their tutoring and their advices on the SEM microscope, to Stéphanie Bruyère and Sylvie Migot for their contributions with the TEM analysis, Erwan Etienne for his help in metallurgical post-treatments. For their help and advices on XRD measurements and analysis, I would like also to thank Pascal Boulet and Sebastien Diliberto from the x-gamma competence cluster. I would like to thank Ilya Bardin from MISIS university of Moscow, with whom I had the pleasure to work in person, discuss and learn from. A great amount of this work involved people from within the Institute Jean Lamour as well as outside the laboratory. I would like to thank Pauline Haraux, Komlan Akoda, Alexandre Bastien, Pascal Brenot, Guillaume Ezo’o, A. Maizeray, O. Ferry and Julien Jourdan for their contributions in this thesis. Charles Roux-Pertus for his help in thickness and porosity calculations. I would very much like to thank all the colleagues of the laboratory for their help, each one in their own way. Vincent Guigoz, Stephane Cuynet, Thierry Czerwiec, Mohammed Belmahi, Maike Thal for their input in my work with occasional discussions to resolve some of the problematics concerning this research. A great thanks to Cédric Noël for his tutoring, support and constant availability on spectroscopic measurements and analysis methods and to Régis Reigner for his technical support. I would like to express my appreciation to Christine Sartori, Georges Billant, Martine Tailleur, Nathalie Niclas, Valerie Frank and Anne-Marie Airault for their help in administrative procedures. I Acknowledgements These three years would have not been the same without the friends I met and from whom I received a warm welcome in and outside the laboratory. Fahad, Joseph, Christophe, Alejandro, Claudia at first and later on Alexis, Marianna, Feriel, Agathe, Shantanu. Thank you guys for all the wonderful moments we have spent. I would like also to thank the Greek community of Nancy, Katerina Cael, Ortho Salomon, Alexandros Petrelis, for their help and support from the very moment of my arrival to Nancy. I am grateful to LabEx DAMAS (Laboratoire d’ Exellence Design of Alloy Metals for low-mAs Structures) for financing this doctoral scholarship. Finally, I would like to thank my family in Greece, my brother and particularly my parents. Their constant support, encouragement, love and care was invaluable during all this period. II Table of Contents Table of Contents General Introduction ......................................................................................................................... 1 Chapter I - State of the art ................................................................................................................ 5 I.1 Introduction .............................................................................................................................................. 5 I.2 Plasma Electrolytic Oxidation .................................................................................................................. 5 I.2.1 Historical development of PEO ......................................................................................................... 5 I.2.2 Processing principle .......................................................................................................................... 6 I.2.3 Supplying modes ............................................................................................................................... 7 I.2.4 Influence of PEO processing parameters .......................................................................................... 8 I.2.4a Effect of the electrolyte ................................................................................................................. 9 I.2.4b Influence of the electrical parameters ......................................................................................... 12 I.3 “Soft” regime ......................................................................................................................................... 14 I.4 Properties of micro-discharges ............................................................................................................... 16 I.4.1 Spatial characteristics ...................................................................................................................... 17 I.4.2 Temporal characteristics ................................................................................................................. 17 I.4.3 Physical properties of the micro-discharges .................................................................................... 19 I.5 Structural properties of PEO oxide coatings .......................................................................................... 21 I.6 Growth mechanisms ............................................................................................................................... 24 I.7 Conclusions of Chapter I ........................................................................................................................ 26 Chapter II - Experimental considerations ..................................................................................... 29 II.1 Introduction of the chapter II ................................................................................................................ 29 II.2 Experimental installation .....................................................................................................................
Load more

Recommended publications
  • Aluminium Products Coil
    Helping manufacturers across the globe achieve sustainable leaner manufacturing processes Aluminium Coil, Foil, Products Sheet & Wire Commercially Pure Aluminium Alloys Series 1000 Series 2000 Series 3000 Fast Series 4000 Series 5000 Turnaround Series 6000 Processing Series 7000 Series 8000 Clad Aluminium WIDE STOCK RANGE Low Width Thickness Ratio 3:1 unique to the industry (normal minimum is 8:1) Over 75 years Experience Knight Group Visit our websites: Main: www.knight-group.co.uk Offcuts: www.ksmdirect.co.uk www.pmdirect.be Head Office Linkside, Summit Road Cranborne Industrial Estate Potters Bar, Hertfordshire EN6 3JL United Kingdom Main Office : +44(0)1707 650251 Fax: +44(0)1707 651238 [email protected] Knight Strip Metals Ltd Sales, Processing & Warehouse Saltley Business Park Cumbria Way, Saltley Birmingham B8 1BH United Kingdom Telephone: +44 (0)121 322 8400 Fax: +44 (0)121 322 8401 Sales 08456 447 977 [email protected] Precision Metals EU Industriezone Mechelen-Noord (D) Omega Business Park Wayenborgstraat 25 2800 Mechelen Belgium Telephone: +32 (0) 15 44 89 89 Fax: +32 (0) 15 44 89 90 [email protected] The information contained herein is given in good faith and is based on our present knowledge and experience. However, no liability will be accepted by the Knight Group and its subsidiaries in respect of any action taken by any third party in reliance thereon. Any advice given by the Company to any third party is given for that party’s assistance only and without any liability on the part of the Company. The contents of this brochure are subject to change and the most recent edition of all Knight Group documentation can be found on our website or by written request.
    [Show full text]
  • Review on Multi-Pass Friction Stir Processing of Aluminium Alloys
    Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 22 July 2020 doi:10.20944/preprints202007.0514.v1 Review Review on Multi-Pass Friction Stir Processing of Aluminium Alloys Oritonda Muribwathoho1, Sipokazi Mabuwa1* and Velaphi Msomi1 1 Cape Peninsula University of Technology, Mechanical Engineering Department, Bellville, 7535, South Africa; [email protected]; [email protected] * Correspondence: [email protected]; Tel.: 27 21 953 8778 Abstract: Aluminium alloys have evolved as suitable materials for automotive and aircraft industries due to their reduced weight, excellent fatigue properties, high-strength to weight ratio, high workability/formability, and corrosion resistance. Recently, the joining of similar and dissimilar metals have achieved huge success in various sectors. The processing of soft metals like aluminium, copper, iron and nickel have been fabricated using friction stir processing. Friction stir processing (FSP) is a microstructural modifying technique that uses the same principles as the friction stir welding technique. In the majority of studies on FSP, the effect of process parameters on the microstructure was characterized after a single pass. However, multiple passes of FSP is another method to further modify the microstructure in aluminium castings. This study is aimed at reviewing the impact of multi-pass friction stir processed joints of aluminium alloys and to identify a knowledge gap. From the literature that is available on multi-pass FSP, it has been observed that the majority of the literature focused on the processing of plates than the joints. There is limited literature reporting on multi-pass friction stir processed joints. This then creates a need to study further on multi-pass friction stir processing on dissimilar aluminium alloys.
    [Show full text]
  • Metallurgical Abstracts (General and Non-Ferrous)
    METALLURGICAL ABSTRACTS (GENERAL AND NON-FERROUS) Volume 2 1935 Part 13 I —PROPERTIES OF METALS (Continued from pp. 553-568.) Refined Aluminium. Robert GaDeau (Metallurgist (Suppt. to Engineer), 1936, 11, 94-96).—Summary of a paper presenteD to the Congrès Inter­ nationale Des Mines, De la Métallurgie, et De la Géologie Appliquée, Paris. See Met. Abs., this vol., pp. 365 anD 497.—R. G. _ On the Softening and Recrystallization of Pure Aluminium. ------ (A lu­ minium, 1935, 17, 575-576).—A review of recent work of Calvet anD his collaborators ; see Met. Abs., this vol., pp. 453, 454. A. R. P. *Some Optical Observations on the Protective Films on Aluminium in Nitric, Chromic, and Sulphuric Acids. L. TronstaD anD T. HbverstaD (Trans. Faraday Soc., 1934, 30, 362-366).—The optical properties of natural films on aluminium were measureD in various solutions anD their change with time of immersion observeD. Little change occurs in such films in chromic aciD solutions with or without chloriDe ; the films are not protective in concentrateD sulphuric aciD, anD in concentrateD nitric aciD the protective films are alternately DissolveD anD re-formeD. The mean thickness of natural films on aluminium is 100 p. or more than 10 times as thick as those on iron.—A. R. P. *Light from [Burning] Aluminium and Aluminium-Magnésium [Alloy], J. A. M. van Liempt anD J. A. De VrienD (Bee. trav. chim., 1935, 54, 239-244). „ . —S. G. ’"Investigations Relating to Electrophotophoresis Exhibited by Antimony Gisela Isser anD AlfreD Lustig (Z . Physik, 1935, 94, 760-769).—UnchargeD submicroscopic particles subjecteD to an electric fielD in an intense beam of light are founD to move either in the Direction of, or against, the fielD.
    [Show full text]
  • Hybrid Sol-Gel Coatings: Smart and Green Materials for Corrosion
    coatings Review Hybrid Sol Sol-Gel‐Gel Coatings: Smart and Green Materials for Corrosion Mitigation Rita B. Figueira 1,*, Isabel R. Fontinha 1, Carlos J. R. Silva 2 and Elsa V. Pereira 1 Rita B. Figueira 1,*, Isabel R. Fontinha 1, Carlos J. R. Silva 2 and Elsa V. Pereira 1 1 LNEC, Laboratório Nacional de Engenharia Civil, Av. Brasil 101, Lisboa 1700‐066, Portugal; 1 [email protected], Laboratório (I.R.F.); Nacional [email protected] de Engenharia (E.V.P.) Civil, Av. Brasil 101, Lisboa 1700-066, Portugal; 2 [email protected] de Química, (I.R.F.);Universidade [email protected] do Minho, (E.V.P.) Campus de Gualtar, Braga 4710‐057, Portugal; 2 [email protected] de Química, Universidade do Minho, Campus de Gualtar, Braga 4710-057, Portugal; * Correspondence:[email protected] [email protected] or [email protected]; Tel.: +351‐218‐443‐634 or +351‐966‐430‐142 * Correspondence: rmfi[email protected] or rita@figueira.pt; Tel.: +351-218-443-634 or +351-966-430-142 Academic Editor: Naba K. Dutta Received:Academic 17 Editor: December Naba 2015; K. Dutta Accepted: 11 March 2016; Published: March 2016 Received: 17 December 2015; Accepted: 11 March 2016; Published: 16 March 2016 Abstract: CorrosionCorrosion degradation degradation of of materials materials and and metallic metallic structures structures is one is one of the of major the major issues issues that givethat giverise riseto depreciation to depreciation of assets, of assets, causing causing great great financial financial outlays outlays in in their their recovery recovery and and or prevention.
    [Show full text]
  • Joining of AI-B4C Metal Matrix Composites by Laser Welding and Friction Stir Welding
    Joining of AI-B4C Metal Matrix Composites by Laser Welding and Friction Stir Welding Dissertation Presented in Partial Fulfillment of the Requirement for the Degree of Doctor of Philosophy By Junfeng Guo UNIVERSITE DU QUEBEC A CHICOUTIMI 2012 Director: X. Grant Chen (UQAC) Co-director: Patrick Gougeon (NRC-ATC) Abstract AI-B4C MMCs are important materials as neutron absorber in spent nuclear fuel storage and transportation due to their high boron (10B) concentration and thus high neutron absorption capability. However, wide application of these materials is still limited due to the lack of suitable joining techniques to fully take advantage of the materials. Problems such as porosity and chemical reaction between Al matrix and B4C particles can arise during fusion welding of the material. Therefore, the present study is intended to find effective and reliable welding techniques for AI-B4C MMCs. The weldability of AA1100- 16%B4C (particle size: 11 pirn) and AA1100-30%B4C MMCs (median particle size: 15 pirn) was evaluated using laser welding and friction stir welding. In comparison with conventional arc welding techniques, the deep and narrow fusion zones associated with laser welding can result in smaller heat affected zones, and thus less thermal distortion and mechanical property degradation. On the other hand, friction stir welding, as a solid state process, seems promising as it can avoid various problems that may otherwise be encountered during fusion welding of MMCs. For laser welding without filler, it was found that most B4C particles were decomposed during welding leading to formation of needle-like AIB2 and AI3BC phases in the weld.
    [Show full text]
  • Cold Metal Transfer Welding of AA1050 Aluminum Thin Sheets
    ISSN 1517-7076 artigo 11730, pp.615-622, 2016 Cold metal transfer welding of AA1050 aluminum thin sheets Alaattin Ozan İrizalp 1, Hülya Durmuş2 Nilay Yüksel2, İlyas Türkmen2 1Celal Bayar University, Institute of Natural and Applied Sciences, Manisa, Turkey e-mail: [email protected] 2Celal Bayar University, Faculty of Engineering, Materials Engineering Department, Manisa, Turkey e-mail:[email protected]; [email protected]; [email protected] ABSTRACT This study was aimed to investigate the welding parameters on mechanical behavior of 2 mm thick AA1050 sheet materials joined by cold metal transfer (CMT) method. Macro structural examination showed that decreasing heat input decreased the pore size in the weld metal. Tensile test was applied and failure occurred in heat affected zone of aluminum sheet metal. Maximum tensile strength was found in the sample with minimum heat input. Heat affected zone was observed explicitly in the sample produced with the maximum heat input. Decreasing joint gap affected the bending strength positively. Bending strength was found superior with maximum bonding line length. Keywords: CMT welding, mechanical characterization, AA1050. 1. INTRODUCTION Arc welding of thin sheet aluminum alloys pose unique challenges. Due to comparatively high coefficients of thermal expansion and thermal conductivity when compared to steel, control of heat input to the weldments is a major prerequisite to avoid some problems such as burning through and distortion [1,2]. The benefits including thin heat affected zone, little distortion and improved productivity made the cold metal transferring (CMT) process incomparable when applied in welding thin plates and weld-brazing [3].
    [Show full text]
  • Effect of Focal Position Offset on Joint Integrity of AA1050 Battery Busbar Assembly During Remote Laser Welding
    journal of materials research and technology 2021;14:2715e2726 Available online at www.sciencedirect.com journal homepage: www.elsevier.com/locate/jmrt Original Article Effect of focal position offset on joint integrity of AA1050 battery busbar assembly during remote laser welding * Tianzhu Sun , Pasquale Franciosa, Dariusz Ceglarek Warwick Manufacturing Group (WMG), University of Warwick, Coventry, CV4 7AL, UK article info abstract Article history: This paper aims at studying the impact of focal position offset on joint integrity of AA1050 Received 14 December 2020 battery busbar during remote laser welding. Welding experiments were conducted at Accepted 2 August 2021 different focal position offsets in the AA1050 L-joint with the integration of laser beam Available online 9 August 2021 oscillation. The impact of focal position offset was evaluated by multiple joint indicators including weld geometry, thermal profile, weld porosity and mechanical strength. Results Keywords: showed that defocusing of the laser beam tends to be favourable for the reduction of peak Remote laser welding (RLW) temperatures and weld porosity. However, a defocusing more than 3 mm can lead to 60% Battery busbar assembly drop in bonding integrity and 40% loss of joint strength. A tolerance window of [-2 1] mm AA1050 was determined for the focal position offset, corresponding to 70% and 30% of the Rayleigh Joint integrity length. This result is a useful reference to inform precise focal position control with respect Focal position offset to the accumulated variations of part tolerance, part-to-part gap and part positioning er- rors. This study also indicated that the thermal measurement can be a potential approach for in-process monitoring of joint integrity.
    [Show full text]
  • Pietro Pedeferri's Great Contribution on Understanding Corrosion in Concrete
    European Corrosion Congress 2009 (EUROCORR 2009) Nice, France 6-10 September 2009 Volume 1 of 6 ISBN: 978-1-61567-796-2 Printed from e-media with permission by: Curran Associates, Inc. 57 Morehouse Lane Red Hook, NY 12571 Some format issues inherent in the e-media version may also appear in this print version. Copyright© (2009) by CEFRACOR All rights reserved. Printed by Curran Associates, Inc. (2010) For permission requests, please contact CEFRACOR at the address below. CEFRACOR 28 Rue Saint Dominique 75007 Paris France Phone: +33 (0) 1 47 05 39 26 Fax: +33 (0) 1 45 55 90 74 [email protected] Additional copies of this publication are available from: Curran Associates, Inc. 57 Morehouse Lane Red Hook, NY 12571 USA Phone: 845-758-0400 Fax: 845-758-2634 Email: [email protected] Web: www.proceedings.com TABLE OF CONTENTS VOLUME 1 PIETRO PEDEFERRI'S GREAT CONTRIBUTION ON UNDERSTANDING CORROSION IN CONCRETE................................1 Luciano Lazzari KEY ISSUES ON MATERIALS COMPATIBILITY AND RELATED TECHNOLOGIES FOR TRANSMUTATION SYSTEMS ......................................................................................................................................................................2 C. Fazio INFLUENCE OF PROTEIN AND MICRO-STRUCTURE ON THE PASSIVE FILM FORMATION ON MOM HIP REPLACEMENTS.....................................................................................................................................................................................3 Michael Schymura, Mathew Mathew, Robin Pourzal,
    [Show full text]
  • Development of a Fabrication Process for a MEMS Component from Ultra Fine Grained Alloys
    University of Southampton Research Repository ePrints Soton Copyright © and Moral Rights for this thesis are retained by the author and/or other copyright owners. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This thesis cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder/s. The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given e.g. AUTHOR (year of submission) "Full thesis title", University of Southampton, name of the University School or Department, PhD Thesis, pagination http://eprints.soton.ac.uk UNIVERSITY OF SOUTHAMPTON FACULTY OF ENGINEERING, SCIENCE AND MATHEMATICS School of Engineering Sciences Development of a Fabrication Process for a MEMS Component from Ultra Fine Grained Alloys by Xiao Guang Qiao Thesis for the degree of Doctor of Philosophy February 2010 UNIVERSITY OF SOUTHAMPTON ABSTRACT FACULTY OF ENGINEERING, SCIENCE & MATHEMATICS SCHOOL OF ENGINEERING SCIENCES Doctor of Philosophy DEVELOPMENT OF A FABRICATION PROCESS FOR A MEMS COMPONENT FROM ULTRA FINE GRAINED ALLOYS By Xiao Guang Qiao This thesis presents a study on the feasibility of fabricating a MEMS component by embossing using ultra-fine grained (UFG) aluminium alloys. The main elements of the work involved designing the equipment, production of UFG aluminium alloys through equal channel angular pressing (ECAP), embossing of the UFG alloys and the construction of models that improve the understanding of the main elements of the processing.
    [Show full text]
  • Questions for ACMT 1. the Tendency of a Deformed Solid to Regain Its
    Questions for ACMT 1. The tendency of a deformed solid to regain its actual proportions instantly upon unloading known as _ a) Perfectly elastic b) Delayed elasticity c) Inelastic effect d) Plasticity 2. How is Young’s modulus of elasticity defined? 3. The permanent mode of deformation of a material known as _____________ a) Elasticity b) Plasticity c) Slip deformation d) Twinning deformation 4. The ability of materials to develop a characteristic behavior under repeated loading known as ______ a) Toughness b) Resilience c) Hardness d) Fatigue 5. What is the unit of tensile strength of a material? a) engineering-materials-metallurgy-questions-answers-mechanical-properties-q5 b) kg/cm2 c) engineering-materials-metallurgy-questions-answers-mechanical-properties-q5-2 d) cm2/kg 6. Which of the following factors affect the mechanical properties of a material under applied loads? a) Content of alloys b) Grain size c) Imperfection and defects d) Shape of material 7. The ability of a material to resist plastic deformation known as _____________ a) Tensile strength b) Yield strength c) Modulus of elasticity d) Impact strength 8. The ability of a material to be formed by hammering or rolling is known as _________ a) Malleability b) Ductility c) Harness d) Brittleness 9. What type of wear occurs due to an interaction of surfaces due to adhesion of the metals? a) Adhesive wear b) Abrasive wear c) Fretting wear d) Erosive wear 10. Deformation that occurs due to stress over a period of time is known as ____________ a) Wear resistance b) Fatigue c) Creep d) Fracture 11.
    [Show full text]
  • Aluminium Design and Construction
    Aluminium Design and Construction Copyright 1999 by Taylor & Francis Group. All Rights Reserved. Aluminium Design and Construction John Dwight MSc, FI Struct E Former Reader in Structural Engineering, University of Cambridge; and Fellow of Magdalene College, Cambridge E & FN SPON An Imprint of Routledge London and New York Copyright 1999 by Taylor & Francis Group. All Rights Reserved. First published 1999 by E & FN Spon, an imprint of Routledge 11 New Fetter Lane, London EC4P 4EE This edition published in the Taylor & Francis e-Library, 2002. Simultaneously published in the USA and Canada by Routledge 29 West 35th Street, New York, NY 10001 © 1999 John Dwight All rights reserved. No part of this book may be reprinted or reproduced or utilized in any form or by any electronic, mechanical, or other means, now known or hereafter invented, including photocopying and recording, or in any information storage or retrieval system, without permission in writing from the publishers. British Library Cataloguing in Publication Data A catalogue record for this book is available from the British Library Library of Congress Cataloging in Publication Data Dwight, J.B. (John B.), 1921– Aluminium design and construction/J.B.Dwight. p. cm. Includes bibliographical references and index. ISBN 0-419-15710-7 (Print Edition) 1. Aluminum construction. 2. Aluminum. 3. Aluminum, Structural. 4. Structural design—Standards—Europe. I. Title TA690.D855 1998 624.1'826–dc21 98–39235 CIP ISBN 0 419 15710 7 (Print Edition) ISBN 0-203-02819-8 Master e-book ISBN ISBN 0-203-13449-4 (Glassbook Format) Copyright 1999 by Taylor & Francis Group.
    [Show full text]
  • Corrosion Protection of Aluminum Coated with a Polymer Matrix in Presence and Absence of Conductive Polymer
    DEGREE PROJECT IN CHEMICAL SCIENCE AND ENGINEERING, SECOND CYCLE, 30 CREDITS STOCKHOLM, SWEDEN 2020 Corrosion protection of aluminum coated with a polymer matrix in presence and absence of conductive polymer MOHAMED HASSAN ABDI KTH ROYAL INSTITUTE OF TECHNOLOGY SCHOOL OF ENGINEERING SCIENCES IN CHEMISTRY, BIOTECHNOLOGY 1AND HEALTH DEGREE PROJECT IN CHEMICAL SCIENCE AND ENGINEERING, SECOND CYCLE, 30 CREDITS STOCKHOLM, SWEDEN 2020 Abstract Aluminum and aluminum alloys have rather good corrosion resistance, but these materials can still corrode. Metal corrosion is never wanted, and it can lead to disastrous outcomes in various industries and applications. There are different methods to protects aluminum and its alloys from corrosion, such as anodization and the use of various coatings techniques. Not a lot of research have been done on aluminum coated with an organic coating containing conductive polymer. Even less is known about aluminum coated with a waterborne polymer matrix containing conductive polymer. Three systems were investigated in my diploma thesis work regarding their anti-corrosion properties. To this end electrochemical impedance spectroscopy, open circuit potential and potentiodynamic polarization were utilized, and also some atomic force microscopy, AFM, measurements were done. Aluminum coated with a waterborne polymer matrix in the absence of PANI had a good corrosion protection at first but reduced barrier properties over time in 1 M NaCl. The shelf-life of the waterborne polymer matrix in the absence of PANI was also briefly investigated. It was shown that a freshly made waterborne polymer matrix exhibited better corrosion protection than a 2 years old waterborne polymer matrix stored at room temperature. Aluminum coated with the waterborne polymer matrix in the presence of PANI showed signs of active corrosion protection initially, but it transitioned to passive corrosion protection with time.
    [Show full text]