Atomic force microscopy and electrochemical investigation on the corrosion behavior of carbon steel passivated by molybdate and chromate

Zhenyu Chen; Xiulan Zhang; Ling Huang; Xingpeng Guo

doi:10.1002/jemt.22148

Atomic force microscopy and electrochemical investigation on the corrosion behavior of carbon steel passivated by molybdate and chromate

Microsc Res Tech. 2013 Feb;76(2):173-7. doi: 10.1002/jemt.22148. Epub 2012 Nov 24.

Authors

Zhenyu Chen¹, Xiulan Zhang, Ling Huang, Xingpeng Guo

Affiliation

¹ School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.

PMID: 23180386
DOI: 10.1002/jemt.22148

Abstract

The effects of CrO(4)(2-) and MoO(4)(2-) ions on the corrosion behavior of carbon steel in 0.5 M NaCl solution have been studied using electrochemical measurements and atomic force microscopy. The results suggest that both ions have good inhibition effects on the general and pitting corrosion of carbon steel. At the same concentration, the inhibition efficiency of CrO(4)(2-) is higher than that of MoO(4)(2-). The passive film formed by CrO(4)(2-) is also much harder than that formed by MoO(4)(2-). The passive films formed by both ions are nonconductive.

Publication types

Research Support, Non-U.S. Gov't