## Abstract The global trend toward decreasing of atmospheric pollution, by saving fuel consumption in vehicles, has led to extensive interest of using lightweight metals such as magnesium alloys, in engine and cooling system components. The modern coolant is not intended to prevent corrosion of ma
Recent Progress in Corrosion and Protection of Magnesium Alloys
โ Scribed by G. Song
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 864 KB
- Volume
- 7
- Category
- Article
- ISSN
- 1438-1656
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โฆ Synopsis
Abstract
Magnesium alloys are advanced light structural and functional materials being increasingly used in the automotive, aerospace, electronic, and energy industries. However, their corrosion performance at the current stage of development is still not good enough for increasingly diverse practical applications. The Cooperative Research Centre for Cast Metals Manufacturing (CAST) in Australia is one of the most active research organizations in the world established to cope with the problems associated with the development and application of advanced light metals. Corrosion and prevention of magnesium and its alloys is an important part of CAST's research program. This paper presents a brief summary of recent research achievements by CAST and relevant research work in this area in the world. This overview covers โanodic hydrogen evolutionโ, estimation of corrosion rate, corrosion of aluminumโ and nonโaluminumโcontaining magnesium alloys, influences of composition and microstructure on corrosion, corrosion of a dieโcast magnesium alloy, galvanic corrosion, coolant corrosion, and an aluminumโalloyed coating. The aim of this overview is to deepen the current understanding of corrosion and protection of magnesium and its alloys and to provide a base for future research work in this field.
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## Abstract The corrosion behaviour of magnesium alloys is not substantially comparable to other metals, such as iron, nickel and copper. It is always accompanied by hydrogen evolution. More hydrogen is evolved at a more positive potential or a higher anodic current density. The โstrangeโ hydrogen
A number of magnesium alloys show promise as engine block materials. However, a critical issue for the automotive industry is corrosion of the engine block by the coolant and this could limit the use of magnesium engine blocks. This work assesses the corrosion performance of conventional magnesium a