Abstract: Cyclohexylamine acts as a pitting inhibitor for AISI 304 stainless steel in neutral NaCl solutions. The pitting resistance was investigated by means of different electrochemical measurement methods, such as stable anodic polarization curves, EIS, potentiostatic open - circuit relaxation curves and chronopotential method for pit growth etc. It was found that cyclohexylamine can prevent AISI 304 in NaCl solutions from both pitting initiation and pitting propagation. Since cyclohexylamine is adsorbed on the metal surface, it enhances the self - repaired ability of passive film so that it can hinder pitting nu-cleation and pit growth.

摘要： 采用稳态阳极极化曲线、电化学阻抗谱(EIS)、恒电位开路衰减响应曲线和计时电位法等多种电化学测试技术研究了环己胺对AISI 304不锈钢在NaCl溶液中的孔蚀缓蚀性能。结果表明环己胺不仅可以显著降低304不锈钢在NaCl体系中的孔蚀敏感性,而且对蚀孔发展也有较好的抑制效果。缓蚀作用是由于环己胺在金属表面形成吸附层,提高了钝化膜的自修复能力,从而抑制了蚀孔的发生和发展。