论文部分内容阅读
通过电化学测量，研究了Ｃ１－ 和ＳＯ２－４ 浓度、介质温度和电位对孔蚀诱导 期的影响规律。实验结果表明，孔蚀的诱发速度（沿文献用语，并以诱导期的 倒数１／ｒ表之）遵循着下列方程： １／τ＝Ａｅｘｐ（－Ｅα／ＲＴ）［Ｃ１－］α「ＳＯ２４］β 孔蚀诱发的推动力（ Ｅ）愈大，诱发速度愈快。根据实验结果，对孔蚀的诱 发机理进行了探索，认为吸附的Ｃ１ 与膜中金属阳离子形成易溶盐，导致了 钝化膜的溶解破坏。达到诱导期时，钝化膜局部被“穿透”，基体金属开始 溶解。
The influence of the concentration of C1- and SO2-4, the medium temperature and the potential on the inducement of pitting corrosion was studied by electrochemical measurements. The experimental results show that the induced rate of pitting (in the literature, with the reciprocal of the induction period 1 / r) follows the following equation: 1 / τ = Aexp (-Eα / RT) [C1-] The larger the impetus (E) induced by β-pitting, the faster the induced rate.According to the experimental results, the inducing mechanism of pitting corrosion was explored, and the adsorbed C1 forms soluble salt with the metal cations in the membrane, resulting in the passivation Membrane dissolution damage to reach the induction period, the passive film is partially “penetrated”, the base metal began to dissolve.