New insights into the corrosion of magnesium alloys - The role of aluminum

SCRIPTA MATERIALIA

卷:115

Article

Esmaily, M.¹  Blucher, D. B.²  Svensson, J. E.¹  Halvarsson, M.³  Johansson, L. G.¹ 

[1] Chalmers, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden

[2] SINTEF Mat & Chem, N-7465 Trondheim, Norway

[3] Chalmers, Dept Appl Phys, SE-41296 Gothenburg, Sweden

关键词: Magnesium alloys;    Atmospheric corrosion;    Surface film;    Aluminum;   

DOI  :  10.1016/j.scriptamat.2016.01.008

来源: Elsevier

【 摘 要 】

The atmospheric corrosion of several Mg-Al alloys was investigated at -4,4 and 22 degrees C. The rate of corrosion increased with increasing temperature and decreasing Al content. Also, the effect of temperature became stronger with increasing Al content. The cast microstructure was found to influence both the average corrosion rate and the temperature dependence of corrosion. The influence of Al on corrosion and on the temperature dependence of corrosion is discussed in terms of the AI enriched layer in the bottom of the surface film and the breakdown of the same layer by chloride ions. (C) 2016 Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

【 授权许可】

Free