通过动电位极化方法研究了S02-4对X80管线钢在含0.01 mol/L NaCl的0.5 mol/L NaHCO3溶液中点蚀行为的影响,并通过电容测量方法对其机理进行了研究.结果表明:当溶液中SO2-4和Cl-共存时,随着SO2-4浓度的增大,点蚀电位降低,点蚀数量增加,X80钢发生点蚀的倾向性增大.这主要是因为吸附在试样表面的SO2-4增加了X80钢表面钝化膜内的缺陷数量,从而增加了点蚀萌生的位置和几率.
参考文献
| [1] | Woon -Jin Lee;Su-Il Pyun .Effects of sulphate ion additives on the pitting corrosion of pure aluminum in 0.01 M NaCl solution[J].Electrochimica Acta,2000(12):1901-1910. |
| [2] | Diez-Perez I;Vericat C;Gorostiza P;Sanz F .The iron passive film breakdown in chloride media may be mediated by transient chloride-induced surface states located within the band gap[J].Electrochemistry communications,2006(4):627-632. |
| [3] | S. Ningshen;U. Kamachi Mudali;V.K. Mittal;H.S. Khatak .Semiconducting and passive film properties of nitrogen-containing type 316LN stainless steels[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2007(2):481-496. |
| [4] | 梁平,李晓刚,杜翠薇,陈旭,张亮.Cl-对X80管线钢在NaHCO3溶液中腐蚀性能的影响[J].北京科技大学学报,2008(07):735-739. |
| [5] | Michael Pagitsas;Aggeliki Diamantopoulou;Dimitra Sazou .Distinction between general and pitting corrosion based on the nonlinear dynamical response of passive iron surfaces perturbed chemically by halides[J].Electrochemistry communications,2001(7):330-335. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%