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采用浸蚀法、测定孔蚀特征电位及ｉ－ｔ曲线、模拟闭塞电池试验及交流阻抗频谱技术等，研究了１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢在氯化物水溶液中的孔蚀行为，以及十二烷基苯磷酸钠和／或单乙醇胺对孔蚀引发与扩展过程的抑制作用．发现十二烷基苯磷酸钠及单乙醇胺对本腐蚀体系有一定的缓蚀作用，二者有明显的协同效应，这种效应主要表现在对孔蚀扩展阶段的影响．模拟闭塞电池实验表明，孔蚀的扩展阶段包含稳定扩展阶段及加速扩展阶段，添加剂使稳定扩展阶段的Ｎｙｑｕｉｓｔ图的低频部容抗派加大；在加速扩展阶段，低频部增加一个容抗弧．
The corrosion behavior of 1Cr18Ni9Ti stainless steel in chloride aqueous solution was studied by etching method, the characteristic potential of pitting corrosion and i-t curve, the simulation of the closed-cell battery and the AC impedance spectroscopy. The effects of dodecyl sodium phenyl phosphate and / Or monoethanolamine pitting initiation and expansion of the inhibition process. It was found that sodium dodecylbenzene phosphate and monoethanolamine had a certain corrosion inhibition effect on the corrosion system, and the synergistic effect was found between the two systems. The effect is mainly attributed to the influence of the pitting corrosion stage. Simulated closed cell experiments show that the extended phase of pitting corrosion includes a stable spreading phase and an accelerating spreading phase. The additive increases the low-frequency capacitance of the Nyquist plot in the steady-state expansion phase. In the accelerating expansion phase, a capacitive arc is added in the low-frequency section.