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通过静态浸泡腐蚀、电化学腐蚀实验等方法研究了真空吸铸态高铝高铁青铜合金Cu-15Al-XFe(X=10,12,15)在5.0%H2SO4溶液中的腐蚀行为,利用扫描电镜对合金腐蚀前后微观金相组织和腐蚀形貌进行了观察,讨论了铝青铜合金的腐蚀机理及合金元素Fe的含量对铝青铜合金耐蚀性的影响。结果表明:在5.0%H2SO4溶液中,Cu-15Al-XFe合金有良好的耐蚀性,合金中的晶界与基体相和富铁相相比,具有优先腐蚀倾向,合金主要发生脱铝脱铁选择性腐蚀。其中,Cu-15Al-12Fe铝青铜合金具有最好的耐蚀性。
The corrosion behavior of Cu-15Al-XFe (X = 10,12,15) vacuum-as-cast high-aluminum high-iron bronze alloy in 5.0% H2SO4 solution was studied by means of static immersion corrosion and electrochemical corrosion experiments. The microstructure and the morphology of the microstructure before and after the corrosion of the alloy were observed. The corrosion mechanism of the aluminum bronze alloy and the content of the alloying element Fe on the corrosion resistance of the aluminum bronze alloy were discussed. The results show that the Cu-15Al-XFe alloy has good corrosion resistance in 5.0% H2SO4 solution. The grain boundary in the alloy has a preferential corrosion tendency compared with the matrix phase and the iron-rich phase. Selective corrosion. Among them, Cu-15Al-12Fe aluminum bronze alloy has the best corrosion resistance.