Corrosion prevention of magnesium alloys

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  • Author : G.S. Cole
  • Publisher : Elsevier Inc. Chapters
  • Pages : 582 pages
  • ISBN : 0128089571
  • Rating : /5 from reviews
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Download or Read online Corrosion prevention of magnesium alloys full in PDF, ePub and kindle. this book written by G.S. Cole and published by Elsevier Inc. Chapters which was released on 22 February 2013 with total page 582 pages. We cannot guarantee that Corrosion prevention of magnesium alloys book is available in the library, click Get Book button and read full online book in your kindle, tablet, IPAD, PC or mobile whenever and wherever You Like. This chapter discusses magnesium corrosion with particular reference to how magnesium automotive components, exposed to the automotive corrosion environment, can be protected and provide durable function. The chapter introduces the four types of corrosion that occur with automotive magnesium alloy components. The major focus is on the galvanic events associated with manufacturing and fastening between magnesium components and the steel/aluminum structures used in automotive construction. Examples of new applications, taken from the literature, are discussed with details of the protective modalities that were developed to ensure long-term vehicle durability.

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : G.S. Cole
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

This chapter discusses magnesium corrosion with particular reference to how magnesium automotive components, exposed to the automotive corrosion environment, can be protected and provide durable function. The chapter introduces the four types of corrosion that occur with automotive magnesium alloy components. The major focus is on the galvanic events associated with manufacturing and fastening between magnesium components and the steel/aluminum structures used in automotive construction. Examples of new applications, taken from the literature, are discussed with details of the

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : X.-P. Guo,G.-L. Song,J.-Y. Hu,D.-B. Huang
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Addition of inhibitors in service environments is a practical corrosion protection approach for engineering materials in industry. This chapter provides an overview of corrosion inhibition of magnesium (Mg) alloys. After a summary of inhibitor inhibition mechanisms on Mg, a few case studies on inhibitor selection and inhibition efficiency evaluation for Mg and its alloys in various media are presented. Based on promising results, future work in this area is proposed.

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : X.-B. Chen,M.A. Easton,N. Birbilis,H.-Y. Yang,T.B. Abbott
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

The escalation of ongoing research on the topic of conversion coatings for magnesium alloys confirms that the search continues for appropriate replacements to toxic chromate-based coatings. This chapter reviews the performance of the range of typical conversion coating technologies presently available. As a means to rationalise coating performance and characteristics more generally, thermodynamic analysis has been used to compare coating processes and coating pretreatment, the latter of which appears to be at least as significant as the choice of coating

Corrosion of Magnesium Alloys

Corrosion of Magnesium Alloys
  • Author : G L Song
  • Publisher : Elsevier
  • Release : 25 March 2011
GET THIS BOOK Corrosion of Magnesium Alloys

The use of magnesium alloys is increasing in a range of applications, and their popularity is growing wherever lightweight materials are needed. This book provides a comprehensive account of the corrosion of magnesium alloys. It covers not only the corrosion performances and mechanisms of Mg alloys in conventional environments, such as sodium chloride solutions, but also looks at their corrosion behaviours in special media, like engine coolants and simulated body fluids. Part one covers fundamentals such as the corrosion electrochemistry,

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : K. Azumi,H.H. Elsentriecy,J. Tang
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Plating on Mg alloys has proved difficult due to their high susceptibility to the degradation reactions such as galvanic corrosion in the plating processes. In this chapter, surface conditioning, activation, electroless- or electroplating methods are discussed from viewpoints of corrosion engineering. Degradation reactions of the Mg substrate in each plating stage are considered to figure out how to suppress degradation of substrate and to achieve uniform deposition of a plating layer. Building up an interface between the substrate and the

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : G.-L. Song,Z. Shi
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Anodization is one of the most important and effective surface pre-treatments for Mg alloys. This chapter systematically summarizes Mg alloy anodizing behavior, the compositions and microstructures of anodized films on Mg alloys and the anodization-influencing factors. Based on the anodizing voltage variation, gas evolution and sparking behavior in a typical anodizing process and the characteristic composition and microstructure of an anodized coating, a four-stage anodizing mechanism is postulated. Moreover, the corrosion performance of anodized Mg alloys is systematically reviewed and

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : B.L. Jiang,Y.F. Ge
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Micro-arc oxidation (MAO) is a novel and attractive surface engineering process for magnesium (Mg) alloys. In an electrolytic bath with high electric energy, the surface of a magnesium alloy can be converted into a dense and hard ceramic oxide coating. The MAO process can be used in diverse applications as a corrosion control technique. Due to its simplified pre-treatment, superior corrosion resistance performance and environmentally safe coating process, MAO technology has emerged as an important alternative to anodizing techniques in

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : G.-L. Song
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

A thin E-coating can be rapidly deposited on the surface of a Mg alloy in a cathodic E-coating bath without applying any current or potential. The selectively self-deposited coating results from the high surface alkalinity of Mg. The ‘electroless’ E-coating pre-film can offer adequate corrosion protection for Mg alloys. The stability of the film can be further improved significantly after curing. The coating can be either a temporary or permanent layer. It may also be used to pre-treat a Mg

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : G.-L. Song,Z. Xu
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Corrosion is a surface degradation process determined by an alloy’s surface state, composition and microstructure. This chapter presents an overview of surface processing and alloying techniques that can improve the corrosion resistance of Mg alloys. It is found that some surface engineering processes can significantly change the surface state, composition and microstructure of Mg alloys. For example, surface mechanical and chemical cleaning can effectively remove surface contaminations; burnishing can modify the surface layer’s microstructure including grain size and

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : G.-L. Song
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Magnesium (Mg) alloys have low corrosion resistance and exhibit unusual corrosion behavior in aqueous environments. Because of this unique corrosion performance, some special corrosion prevention techniques have to be employed for Mg alloys in their applications. This chapter briefly summarizes the corrosion characteristics of Mg alloys, and also presents a strategy and methodologies to mitigate the corrosion damage of Mg alloys in applications.

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : J. Meng,W. Sun,Z. Tian,X. Qiu,D. Zhang
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

In magnesium alloys, the rare-earth (RE) elements first react with the impurities in the alloy, then with alloying elements, and finally form an intermetallic compound with magnesium. Therefore, RE elements play the key role in removing impurity and purifying the matrix in Mg alloys so as to enhance the corrosion resistance. The RE elements have a lower electrode potential resulting in a decrease in the electrode potential of the intermetallic compound in which they participate. The reaction results lead to

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : S.A. Salman,M. Okido
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Anodizing is one of the most widely used surface treatments for magnesium and its alloys. In this electrolytic oxidation process, the surface of a metal is converted to an anodic oxide/hydroxide film with desirable protective, decorative or functional properties. This chapter describes the fundamentals of anodizing treatment, with an emphasis on the difference between magnesium anodizing and aluminum anodizing. The chapter then discusses the most widely used commercial anodic treatments and describes how the treatment conditions affect the corrosion

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : W.-T. Tsai,I.-W. Sun
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

To improve the corrosion resistance of magnesium (Mg) alloys, surface modification is applied in an attempt to produce a corrosion resistant barrier. In this chapter, a new method to deposit aluminum (Al) film on a Mg alloy surface is demonstrated. Electrodeposition of Al on AZ91D Mg alloy, using an acidic aluminum chloride–1-ethyl-3-methyl-imidazolium chloride ionic liquid (AlCl3–EMIC), has been shown to be feasible. The existence of Al coating can cause a substantial increase in corrosion resistance, reducing

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : Q. Li
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Sol-gel coatings have been widely used to improve corrosion resistance of Mg alloys. This chapter summarizes the history of development of sol-gel coatings, the mechanism and research results of sol-gel coatings improving the corrosion resistance of Mg alloys and some relevant applications. In addition, the prospects of the future development of sol-gel coatings on Mg alloy are presented.

Corrosion prevention of magnesium alloys

Corrosion prevention of magnesium alloys
  • Author : J. Dutta Majumdar,I. Manna
  • Publisher : Elsevier Inc. Chapters
  • Release : 22 February 2013
GET THIS BOOK Corrosion prevention of magnesium alloys

Magnesium and its alloys are promising materials for automotive, aerospace and bio-implant applications due to low density (1.81g/cm3), very low elastic modulus (45GPa) and high tensile yield strength (200MPa). However, they corrode too quickly in aggressive environments and possess poor wear resistance. Wear and corrosion are essentially surface dependent degradation which may be improved by suitable modification of surface microstructure and composition. Laser as a source of coherent and monochromatic radiation may be applied for tailoring the surface microstructure