Solution Chemistry in Cuneiform Crevice of 316L Stainless Seel

Zhang Lin; Cao Bei; Wu Yinshun; Cui Qiang; Chen Zhuo; Fang Zhi

doi:10.13374/j.issn1001-053x.1996.s2.008

Volume 18 Issue S2

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Zhang Lin, Cao Bei, Wu Yinshun, Cui Qiang, Chen Zhuo, Fang Zhi. Solution Chemistry in Cuneiform Crevice of 316L Stainless Seel[J]. Chinese Journal of Engineering, 1996, 18(S2): 37-41. doi: 10.13374/j.issn1001-053x.1996.s2.008

Citation:

Zhang Lin, Cao Bei, Wu Yinshun, Cui Qiang, Chen Zhuo, Fang Zhi. Solution Chemistry in Cuneiform Crevice of 316L Stainless Seel[J]. Chinese Journal of Engineering, 1996, 18(S2): 37-41. doi: 10.13374/j.issn1001-053x.1996.s2.008

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Solution Chemistry in Cuneiform Crevice of 316L Stainless Seel

doi: 10.13374/j.issn1001-053x.1996.s2.008

Department of Surface Science and Corrosion Engineering, USTB, Beijing 100083

Received Date: 1996-01-22
Available Online: 2021-11-13

Abstract

Abstract

The solution chemistry in cuneiform crevice of 316L stainless steel was studied in 3.5%NaCl at room temperature.The Cl^-was concentrated and PH value decreased in the cuneiform crevice with two sizes of crevice opening. When the crevice opening is 1.36mm,the Cl^-concentration increased and PH value decreased with time and the distrance from the opening. The highest Cl^-concentration is 1.6mol/l and the lowest PH value is 5.01.When the opening is 0.22mm, the highest Cl^- is 1.1 mol/l and the lowest PH value is 3.1.The very low PH value in the crevice was formed by the hydrolysis of dissolving metal ions and Cl^-. The chloride can be very concentrated in the crevice. even be saturated.
- crevice corrosion,
- 316L stainless steel,
- Cl^-,
- PH