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Magnesium (Mg) alloys are receiving increasing attention due to their abundance, light weight, castability, formability, mechanical properties and corrosion performance. By selecting the appropriate combination of materials, coatings and surface modifications, their corrosion resistance can be greatly enhanced. Corrosion prevention of magnesium alloys is a comprehensive guide to the effective prevention of corrosion in these important light metals.Part one discusses alloying, inhibition and prevention strategies for magnesium alloys as well as corrosion and prevention principles. Part two reviews surface treatment and conversion. Beginning with an overview of surface cleaning and pre-conditioning, the book goes on to discuss the use of surface processing and alloying, laser treatments, chemical conversion and electrochemical anodization to improve the corrosion resistance of magnesium alloys. Coatings are then the focus of part three, including varied plating techniques, cold spray coatings, gel and electroless electrophoresis coatings. Finally, the book concludes in part four with a selection of case studies investigating the application of preventative techniques for both automotive and medical applications.With its distinguished editor and international team of expert contributors, Corrosion prevention of magnesium alloys is a key reference tool for all those working with magnesium and its alloys, including scientists, engineers, metallurgists, aerospace and automotive professionals, and academics interested in this field.
Contents
Contributor contact detailsPrefacePart I: Alloying and inhibitionChapter 1: Corrosion behavior and prevention strategies for magnesium (Mg) alloysAbstract:1.1 Introduction1.2 Corrosion characteristics and implications in protection1.3 Corrosion mitigation strategy1.4 Selection of corrosion protection techniques1.5 Future trendsChapter 2: Corrosion performance of magnesium (Mg) alloys containing rare-earth (RE) elementsAbstract:2.1 Introduction2.2 Factors affecting the Mg-RE alloy corrosion reaction2.3 Structural analysis of the Mg-RE alloys containing Ce or La2.4 Structural analysis of the Mg-RE alloys containing Y2.5 Structural analysis of the Mg-RE alloys containing Nd2.6 Structural analysis of Mg-RE alloys containing Gd2.7 The effect of the cathode area and current density on corrosion2.8 ConclusionsChapter 3: Corrosion inhibition of magnesium (Mg) AlloysAbstract:3.1 Introduction3.2 Inhibitors for magnesium3.3 The behavior of different inhibitors on magnesium and its alloys3.4 The influence of inhibitors on other materials3.5 Inhibition and other corrosion protection techniques3.6 Conclusions and future trendsPart II: Surface treatment and conversionChapter 4: Surface cleaning and pre-conditioning surface treatments to improve the corrosion resistance of magnesium (Mg) alloysAbstract:4.1 Introduction4.2 Principles of physical or mechanical cleaning4.3 Principles of chemical cleaning4.4 Application of cleaning solutions to achieve the desired finish4.5 Conclusion and sources of further information and adviceChapter 5: Surface processing and alloying to improve the corrosion resistance of magnesium (Mg) alloysAbstract:5.1 Introduction5.2 Surface processing techniques to improve corrosion resistance5.3 Effect of surface processing and corrosion resistance5.4 Alloying and corrosion resistance5.5 Conclusions and future trends5.6 AcknowledgementsChapter 6: Laser treatment to improve the corrosion resistance of magnesium (Mg) alloysAbstract:6.1 Introduction6.2 Surface engineering for combating corrosion6.3 Laser surface alloying for combating corrosion6.4 Laser surface cladding for combating corrosion6.5 Conclusions and future trends6.6 AcknowledgementChapter 7: Micro-arc oxidation (MAO) to improve the corrosion resistance of magnesium (Mg) alloysAbstract:7.1 Introduction7.2 Micro-arc oxidation fundamentals7.3 Techniques for the MAO process7.4 Corrosion resistance properties of MAO coating7.5 Applications, industrial MAO processing and exploration of new processes7.6 Future trends7.7 AcknowledgementsChapter 8: Anodization of magnesium (Mg) alloys to improve corrosion resistanceAbstract:8.1 Introduction8.2 Anodization treatment8.3 Effects of anodizing parameters8.4 Commercial magnesium anodizing processes8.5 Other methods and recent developments in anodizing treatment of magnesium8.6 Applications of magnesium alloys8.7 Future trendsChapter 9: Anodization and corrosion of magnesium (Mg) alloysAbstract:9.1 Overview of anodizing techniq9.2 Characteristics of anodizing behavior9.3 Anodized coating/film9.4 Influencing factors9.5 Anodizing mechanism9.6 Corrosion of anodized magnesium (Mg) alloys9.7 Application examplesChapter 10: Corrosion-resistant coatings for magnesium (Mg) alloysAbstract:10.1 Introduction10.2 Conversion coatings for Mg alloys: chromate and phosphate coatings10.3 Conversion coatings for Mg alloys: fluoride (F) and stannate coatings10.4 Conversion coatings for Mg alloys: rare earth (RE) and other coatings10.5 Coating pretreatment processes10.6 Evaluation of the coating (corrosion) performance10.7 ConclusionsPart III: CoatingsChapter 11: Corrosion-resistant electrochemical plating of magnesium (Mg) alloysAbstract:11.1 Introduction11.2 Aqueous plating: pretreatment, undercoating and electroplating11.3 Electroless Ni-P plating11.4 Platings from non-aqueous electrolytes11.5 Evaluation of coatings11.6 ConclusionsChapter 12: Plating techniques to protect magnesium (Mg) alloys from corrosionAbstract:12.1 Introduction12.2 Coating processes12.3 Electroplating of Al from a non-aqueous plating bath12.4 ConclusionsChapter 13: Electroless nickel-boron plating to improve the corrosion resistance of magnesium (Mg) alloysAbstract:13.1 Introduction13.2 Electroless Ni-B plating process and deposition mechanisms13.3 Ni-B plating characterization13.4 Applications and future trendsChapter 14: Electrodeposition of aluminum on magnesium (Mg) alloys in ionic liquids to improve corrosion resistanceAbstract:14.1 Introduction14.2 Basics for ionic liquid plating14.3 Electrochemical characteristics of AlCl3-EMIC ionic liquids14.4 Material characteristics14.5 Electrochemical and corrosion resistance of aluminum (Al) and aluminum/zinc (Al/Zn)-coated magnesium (Mg) alloys14.6 Conclusions14.7 AcknowledgementChapter 15: Cold spray coatings to improve the corrosion resistance of magnesium (Mg) alloysAbstract:15.1 Introduction15.2 Cold spray technology15.3 Cold spray commercial equipment15.4 Corrosion protection by cold spray15.5 ConclusionsChapter 16: Electroless electrophoresis coatings to improve the corrosion resistance of magnesium (Mg) alloysAbstract:16.1 Introduction16.2 Electroless electrophoresis coating on Mg16.3 Coating protection performance16.4 Factors influencing the formation of electroless electrophoresis coatings16.5 Potential applications of electroless electrophoresis coatings16.6 Conclusions and future trends16.7 AcknowledgmentsChapter 17: Sol-gel coatings to improve the corrosion resistance of magnesium (Mg) alloysAbstract:17.1 Introduction17.2 Sol-gel coatings and how they improve the corrosion resistance of Mg alloys17.3 Applications of sol-gel coatings17.4 Future trendsPart IV: Case studiesChapter 18: Magnesium (Mg) corrosion protection techniques in the automotive industryAbstract:18.1 Introduction18.2 Corrosion of magnesium18.3 Preventing corrosion18.4 The use of coatings in corrosion prevention18.5 Applications of corrosion mitigation for magnesium automotive parts18.6 Future trendsChapter 19: Control of biodegradation of magnesium (Mg) alloys for medical applicationsAbstract:19.1 Introduction19.2 Mg alloys studied for medical applications19.3 Corrosion/biodegradation of Mg alloys in the body environment19.4 Corrosion control techniques for biodegradable Mg alloys19.5 Future trendsIndex
