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采用超音速等离子喷涂(HEPJet)技术将新型多元铝青铜合金粉体喷涂在45号钢基体上。通过失重法、极化曲线法、X射线衍射分析(XRD)、扫描电镜(SEM)、能谱(EDS)和电子探针(EPMA-1600)等方法研究多元铝青铜合金涂层在3.5%的NaCl溶液中的腐蚀性能。结果表明,在3.5%的NaCl溶液中,多元铝青铜合金涂层具有良好的耐蚀性能,该涂层的腐蚀速率为0.0636mm/a。腐蚀后试样表面Al元素的含量明显下降,Cu的含量明显增加,可见,涂层发生的主要是脱铝腐蚀。
The new multi-element aluminum bronze alloy powder was sprayed on 45 steel substrate using HEPJet technology. The microstructure and mechanical properties of the multicomponent aluminum bronze alloy coatings were characterized by weight loss method, polarization curve method, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and electron probe (EPMA-1600) Corrosion in NaCl solution. The results show that the multi-element aluminum bronze alloy coating has a good corrosion resistance in 3.5% NaCl solution, and the corrosion rate of the coating is 0.0636 mm / a. The content of Al element on the surface of the sample after the corrosion obviously drops, and the content of Cu increases obviously. It can be seen that the coating is mainly dealuminated.