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采用苯并三氮唑(BTA)复配钝化体系对B10 Cu-Ni合金进行钝化处理,以提高其在含硫化物环境介质中的耐腐蚀性能,并研究工艺参数对钝化膜耐蚀性的影响规律.利用动电位极化曲线和电化学阻抗谱研究钝化膜的耐腐蚀性能,采用X射线光电子能谱分析钝化膜的化学成分.实验结果表明,在BTA与磺基水杨酸组成的复配体系中形成的钝化膜比BTA单一体系中形成的钝化膜具有更高的耐蚀性,这是磺基水杨酸与基体合金反应形成的络合物膜与Cu(I)BTA膜协同作用的结果;钝化处理的时间和温度是影响钝化膜耐蚀性的重要工艺参数,延长钝化时间和提高钝化温度均可以提高钝化膜的耐蚀性,60℃高温条件下5 min的钝化处理即能够达到常温条件下3 h的钝化处理效果.
B10 Cu-Ni alloy was passivated with benzotriazole (BTA) passivation system to improve the corrosion resistance of the B10 Cu-Ni alloy in sulphide-containing environment. The effects of process parameters on corrosion resistance The influence law of the passive film was studied by potentiodynamic polarization curve and electrochemical impedance spectroscopy.The chemical composition of the passivation film was analyzed by X-ray photoelectron spectroscopy.The experimental results show that in the presence of BTA and sulfosalicylic Acid composition of the passivation film formed in the system than BTA single system formed a passivation film has a higher corrosion resistance, which is sulfosalicylic acid and the matrix alloy formed by the reaction of the complex film and Cu ( I) BTA film synergistic results; passivation treatment time and temperature are important parameters affecting the corrosion resistance of the passivation film to extend the passivation time and improve the passivation temperature can improve the corrosion resistance of the passivation film, 60 ℃ 5min passivation under high temperature conditions that can be achieved at room temperature for 3h passivation effect.