Deteriorated corrosion performance of micro-alloyed Mg-Zn alloy after heat treatment and mechanical processing

• 作者: Yiming Jin Carsten Blawert Hong Yang Bj?rn Wiese Jan Bohlen Di Mei Min Deng Frank Feyerabend Regine Willumeit
• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2021,（33）
• 页码范围: 214-224
• 页数: 11页
• 语种: 英文

摘要

The corrosion performances of the as-cast and solution-treated Mg-0.5Zn samples were investigated in 0.9％NaCl solution and compared.From the electrochemical measurement results and corrosion morphol-ogy observations,it is found that the corrosion resistance of Mg-0.5Zn deteriorated with the extension of solution treatment duration.The main reason was the formation of Fe-Si precipitates with higher Fe concentrations during heat treatment.The Fe-Si precipitates,especially the ones with high Fe contents influenced the corrosion initiation and propagation significantly.In regard of corrosion performance,the solution-treated and then extruded sample was also performing not as good as the cast and then directly extruded sample.