Abstract We report that the corrosion resistance of Mg–8Sn–1Zn–1Al alloy is significantly improved by the application of a low-temperature indirect extrusion process utilizing artificial cooling. It was found that the corrosion rates, measured by immersion tests in 0.6 M NaCl solution at 25 °C, are 27.5 and 246.7 mm y−1 for the alloys extruded with and without artificial cooling, respectively. The remarkably improved corrosion resistance is mainly attributed to the reduced nobility of cathodic Al5Fe2 particles, which results in retarded microgalvanic corrosion in the corrosive condition. Metallurgical factors affecting the electrochemical nobility of Al5Fe2 particles are discussed.

中文翻译：

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Mg-8Sn-1Zn-1Al 合金在低温间接挤压下的耐腐蚀性能提高

摘要 我们报告称，Mg-8Sn-1Zn-1Al 合金的耐腐蚀性能通过采用人工冷却的低温间接挤压工艺得到显着提高。结果表明，通过在 25 °C 下的 0.6 M NaCl 溶液中浸泡试验测量的腐蚀速率分别为 27.5 和 246.7 mm y-1，用于挤压和没有人工冷却的合金。显着提高的耐腐蚀性主要归因于阴极 Al5Fe2 颗粒的贵重性降低，这导致在腐蚀条件下延迟微电化腐蚀。讨论了影响 Al5Fe2 颗粒电化学贵重性的冶金因素。