Crevice Corrosion Performance of 436 Ferritic Stainless Steel Studied by Different Electrochemical Techniques in Sodium Chloride Solutions with Sulfate Addition
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The crevice corrosion behaviors of 436 stainless steels in chloride-containing solutions with sulfate addition were studied using potentiodynamic, galvanostatic and repassivation potential measurements. The results of these electrochemical tests were compared and discussed. Galvanostatic test was proved to be the most powerful technique in detecting the crevice corrosion of 436 stainless steels, while the repassivation potential measurement was the most time-saving method in this study. Sulfate ions have inhibited the crevice corrosion of 436 stainless steels in chloride-containing solution, which may result from the effects of competitive adsorption and the IR drop mechanism.
KeywordsCrevice corrosion Ferritic stainless steels Electrochemical techniques Sulfate ions Competitive adsorption IR drop mechanism
The authors gratefully acknowledge Baosteel for providing specimens. This work is financially supported by the National Natural Science Foundation of China (Nos. 51501041 and 51671059).
- M. Rincón Ortiz, R.M. Carranza, M.A. Rodríguez, J. Phys: Conf. Ser. 786, 012034 (2017)Google Scholar
- Y. Zuo, H. Du, J.P. Xiong, J. Mater. Sci. Technol. 16, 286 (2000)Google Scholar
- ASTM G48-03, Annual Book of ASTM Standards, vol. 03.05 (ASTM International, West Conshohocken, PA, 2005)Google Scholar