Pitting Behaviors of Passivated and Trans-Passivated 304 Stainless Steel

Authors

Jing SHEN, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, Xiamen 361005, Fujian, China;
Zi-ming WANG, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, Xiamen 361005, Fujian, China;
Da-jiang ZHENG, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, Xiamen 361005, Fujian, China;
Guang-ling SONG, 1. Center for Marine Materials Corrosion and Protection, College of Materials, Xiamen University, Xiamen 361005, Fujian, China;2. State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, Fujian, China;Follow

Corresponding Author

Guang-ling SONG(guangling.song@hotmail.com)

Abstract

In order to further understand the passivation and trans-passivation behaviors of 304 stainless steels, the samples were pretreated under different polarization potentials and their corrosion behaviors were investigated. It was found that the pitting potential of the untreated sample was the same as that of the sample treated with 1.1 V trans-passivation potential, while the pitting potential of the sample treated with 0.5 V passivation treatment was the highest. This observation was further verified by the SKP results. According to SEM observations, the surface of the untreated sample preserved a polishing morphology, while the surface of the 0.5 V passivation treated sample was covered by a passivation film decorated with small corrosion particles, performing good corrosion resistance. However, cracks appeared on the surface of the 1.1 V trans-passivation treated sample, leading to severe localized corrosion of the matrix and resulting in the deterioration of the trans-passivation film.

Graphical Abstract

Keywords

passivation, trans-passivation, pitting, stainless steel

DOI Link

https://doi.org/10.13208/j.electrochem.190418

Publication Date

2020-12-28

Online Available Date

2020-12-28

Revised Date

2019-06-10

Received Date

2019-04-18

Recommended Citation

Jing SHEN, Zi-ming WANG, Da-jiang ZHENG, Guang-ling SONG. Pitting Behaviors of Passivated and Trans-Passivated 304 Stainless Steel[J]. Journal of Electrochemistry, 2020 , 26(6): 808-814.
DOI: 10.13208/j.electrochem.190418
Available at: https://jelectrochem.xmu.edu.cn/journal/vol26/iss6/15