Enhanced corrosion resistance of cold-sprayed and shot-peened aluminum coatings on LA43M magnesium alloy
Enhanced corrosion resistance of cold-sprayed and shot-peened aluminum coatings on LA43M magnesium alloy
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DOI：
10.1016/j.surfcoat.2020.125865
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发表时间：
2020-07-25
影响因子：
5.4
通讯作者：
Li, Chang-jiu
中科院分区：
文献类型：
--
作者：
Lu, Fei-Fei;Ma, Kai;Li, Chang-jiu
采用冷喷涂和后续喷丸技术，在LA43M镁合金表面制备了致密、薄、抗氧化性良好的铝涂层。采用高能马氏体不锈钢颗粒对冷喷涂层进行夯实，使Al颗粒完全塑性变形，消除了气孔。在电化学测试中，喷丸铝涂层的样品表现出优异的耐蚀性。此外，长期的盐雾和浸泡试验表明，喷丸铝涂层能有效地保护LA43M合金免受腐蚀。喷丸铝涂层在恶劣环境下具有良好的长期应用前景。
A facile and environment-friendly strategy is proposed to prepare dense, thin and antioxidant aluminum coatings on LA43M magnesium alloy via cold spraying and subsequent shot peening technologies. High-energy martensitic stainless steel particles are used to tamp the cold-sprayed coatings, which resulted in complete plastic deformation of Al particles and elimination of pores. The samples with shot-peened Al coating showed excellent corrosion resistance in electrochemical tests. Moreover, long-term salt spray and immersion test revealed that the shot-peened Al coating can effectively protect LA43M alloy from corrosion. Shot-peened Al coating offered promising and long term applications time in the harsh environment.