A Study Self-Passivation of Passivie Film of Stainless Steel in Vinylon Aldehyde Solution

Authors

Si-fu HU, Corrosion Dept. of Fujian Institute on the Structure of Matter, Chinese Academy of Sciences, Xiamen 361012
Chuan-bi XU, Corrosion Dept. of Fujian Institute on the Structure of Matter, Chinese Academy of Sciences, Xiamen 361012
Zhu-qiu CHENG, Corrosion Dept. of Fujian Institute on the Structure of Matter, Chinese Academy of Sciences, Xiamen 361012

Corresponding Author

Si-fu HU

Abstract

Properties of self-passivation for the anodic passive film of 1Cr18Ni9Ti and the firsthand passive film of SUS 36 stainless steel in vinylon aldehyde solution(H₂SO₄(240 g/L)+Na₂SO₄(70 g/L)+HCHO(25 g/L)+[Fe³⁺](35.4 mg/L)+[Cl^-](240 mg/L) at 70 ℃ were studied by galvanostatic and potentiostatic polarization mesurements. The effects of compponents of vinylon aldehyde solution, i.e. Fe³⁺ and Cl^-, on the passivation behaviours of stainless steel have also been investigated. The experimental results showed there is a conversion zone of the active/passive state if the area ratio of active/passive state on these stainless steel attained to a critical value, while the locally damaged passive film by mechinery process could be repassivated by polarization of active-passive couple in a certain medium and so that corrosion may be prevented.

Keywords

Galvanic method, Passive film of stainless steel, Vinylon aldehyde solution, Self-passivation

DOI Link

https://doi.org/10.61558/2993-074X.3193

Publication Date

1999-08-28

Online Available Date

1999-08-28

Revised Date

1999-03-25

Received Date

1999-02-15

Recommended Citation

Si-fu HU, Chuan-bi XU, Zhu-qiu CHENG. A Study Self-Passivation of Passivie Film of Stainless Steel in Vinylon Aldehyde Solution[J]. Journal of Electrochemistry, 1999 , 5(3): 332-336.
DOI: 10.61558/2993-074X.3193
Available at: https://jelectrochem.xmu.edu.cn/journal/vol5/iss3/17