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Surface Engineering of Light Alloys by H Dong

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1

Corrosion behavior of magnesium alloys and protection techniques

G.-L. Song,     General Motors Corporation, USA

Abstract:

Magnesium alloys have low corrosion resistance and exhibit unusual corrosion behavior in aqueous environments. This chapter briefly summarizes the corrosion characteristics of Mg alloys, such as hydrogen evolution, surface alkalization, macro-galvanic damage and micro-galvanic effect, etc. It also discusses the influences of chemical composition of matrix, secondary phase, and impurities, etc. on the corrosion performance of Mg alloys. Following that, a potential strategy is presented to mitigate their corrosion.

Key words

magnesium

corrosion

protection

1.1 Introduction

Magnesium and its alloys have a high strength/density ...

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