Corrosion resistant chemical conversion coatings of automatic healing properties for magnesium alloys

Abstract:

Magnesium alloys are considered to be an excellent light-weight material for several industrial applications such as electronics, computers, automotive and aerospace. Their application in transportation industry, in particular, has gained a special attention where reducing vehicle weight is of prime concern for lowering fuel consumption and, thereby, reducing the toxic CO2 emissions and saving the fuel costs. However, Mg alloys are very susceptible to corrosion especially when corrosive chloride ions are involved in the environment. The development of simple protective self-healing coatings or active corrosion protection (ACP) systems for magnesium alloys will be discussed in this paper. Newly developed protective coatings of self-healing functionality composed of chromate-free environmentally-safe conversion coatings of salts like cerium, tin and vanadium have been investigated. Due to the simplicity of the proposed coatings and ease of application at low costs, the coating technology approach described herein can be used in many industrial applications where active corrosion protection of materials is required. Copyright © 2013 MS&T'13®.

Año de publicación:

2014

Keywords:

• Stannate
• Cerate
• Vanadate
• CORROSIÓN
• Magnesium alloys
• Chemical conversion coatings
• Chromate

Fuente:

scopus