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采用表面增强拉曼光谱技术 ( SERS)研究了 w=0 .0 3Na Cl溶液中 BTA(苯并三氮唑 )及其衍生物 5CBTA( 5-羧基苯并三氮唑 )对铜的缓蚀作用机理 ,发现 5CBTA对铜的作用与 BTA的作用机理相似 ,在较大正电位下两者都是通过三氮唑环与铜形成配合物覆盖在铜表面 ,随着电位负移在铜电极表面吸附的聚合物膜逐渐转化为分子形式吸附 ,5CBTA中的— COOH基团只是起到空间位阻的作用 ,没有参与电极表面的吸附。两者复配使用以 BTA吸附为主 ,其缓蚀机理没有发生改变 ,也没有产生协同效应
The corrosion inhibition effect of BTA (benzotriazole) and its derivative 5CBTA (5-carboxybenzotriazole) on copper in w = 0.3NaCl solution was studied by surface enhanced Raman spectroscopy (SERS) Mechanism and found that the role of 5CBTA on copper and BTA similar mechanism, at a larger positive potential both through the triazole ring and copper to form a complex covering the copper surface, with the negative potential shift in the copper electrode surface adsorption The polymer membrane gradually transforms into molecular form. The - COOH group in 5CBTA only acts as a steric hindrance and does not participate in the adsorption of electrode surface. The combination of the two was mainly based on BTA adsorption, the mechanism of corrosion inhibition did not change and no synergistic effect was found