| 不锈钢孔蚀诱导期和诱发动力学 |
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| 引用本文： | 郭瑞金,火时中. 不锈钢孔蚀诱导期和诱发动力学[J]. 大连理工大学学报, 1987, 0(4) |
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| 作者姓名： | 郭瑞金 火时中 |
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| 作者单位： | 大连工学院腐蚀与防护教研室(郭瑞金)，大连工学院腐蚀与防护教研室(火时中) |
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| 摘 要： | 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。
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| 关 键 词： | 奥氏体合金 点蚀 诱导期 动力学 |
Induction Time and Pit Initiation Kinetics for Austenitic Stainless Steel |
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| Guo Ruijin,Huo Shizhong. Induction Time and Pit Initiation Kinetics for Austenitic Stainless Steel[J]. Journal of Dalian University of Technology, 1987, 0(4) |
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| Authors: | Guo Ruijin Huo Shizhong |
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| Affiliation: | The Teaching and Research Section of Corrosion and Protection |
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| Abstract: | The effects of the concentration of chloride ions and sulphate ions, temper ature and potential on induction time have been studied by electrochemical me asurements. The results show that the rate of pit initiation follows the equation: 1/ T= Aexp(- E /RT) [C1] [SO2-4] The greater the E is, the faster the initiation takes place. Based on the resul- ts, the mechanism of pit initiation is investigated. It is suggested that adsorbed chloride ions react with metallic cations in the film to form easily soluble salt. This leads to the local breakdown of the film. When the induction time arrives the film is penetrated completely. Then the matrix of metals begins to dissolve. |
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| Keywords: | Austenitic alloys pitting induction period kinetics |
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