Effect of SO42− concentration on corrosion damage of 304 stainless steel in Cl− solution

Su Jianwen; Dong Xiaoping; Gao Tengyuan; Zhang Zhaoqing; Sun Zhenduo; Su Dandan

doi:10.7513/j.issn.1004-7638.2022.01.025

Volume 43 Issue 1

Mar. 2022

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Su Jianwen, Dong Xiaoping, Gao Tengyuan, Zhang Zhaoqing, Sun Zhenduo, Su Dandan. Effect of SO42− concentration on corrosion damage of 304 stainless steel in Cl− solution[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(1): 165-173. doi: 10.7513/j.issn.1004-7638.2022.01.025

Citation:

Su Jianwen, Dong Xiaoping, Gao Tengyuan, Zhang Zhaoqing, Sun Zhenduo, Su Dandan. Effect of SO₄²⁻ concentration on corrosion damage of 304 stainless steel in Cl⁻ solution[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(1): 165-173. doi: 10.7513/j.issn.1004-7638.2022.01.025

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Effect of SO₄²⁻ concentration on corrosion damage of 304 stainless steel in Cl⁻ solution

doi: 10.7513/j.issn.1004-7638.2022.01.025

Su Jianwen^{1, 2
,},
Dong Xiaoping^{1, 2, 3
,
,},
Gao Tengyuan^{1, 2},
Zhang Zhaoqing^{1, 2},
Sun Zhenduo^{1, 2},
Su Dandan^{1, 2}

1.
Department of Mechanical Design, Manufacturing and Automation, Hebei University, Baoding 071002, Hebei, China
2.
Baoding New Energy Vehicle Power Engineering Technology Research Center, Hebei University, Baoding 071002, Hebei, China
3.
Hebei Technology Innovation Center for Lightweight of New Energy Vehicle Power System, Hebei University, Baoding 071002, Hebei, China

Received Date: 2020-11-12
Available Online: 2022-04-24
Publish Date: 2022-02-28

Abstract

Abstract

In order to investigate the effect of SO₄²⁻ on the corrosion damage of 304 stainless steel in a solution containing 0.7 mol/L Cl⁻, acoustic emission technology and morphology observation technology were used to test the acoustic signal generated during the corrosion process and the surface morphology of the sample before and after corrosion, respectively. In the Cl⁻/SO₄²⁻ solution, with the increase of SO₄²⁻ concentration, the parameters such as relative energy and amplitude of AE signal generated during the corrosion process, the slope of cumulative number of impacts and duration time, as well as the number of corrosion pits and the number of cracked massive corrosion products firstly decrease and then increase. The degree of surface looseness caused by cracked corrosion products is firstly tight and then loose with the increase of SO₄²⁻ concentration. The time period of sample corrosion damage is different due to the concentration of SO₄²⁻ ions. The time periods for sample damage at 0, 0.10, 0.25, and 0.40 mol/L concentrations are the early and mid-term, early, late and full time periods of corrosion, respectively. The order of SO₄²⁻ ion concentration influencing the degree of corrosion damage from heavy to light is 0 mol/L> 0.40 mol/L> 0.10 mol/L> 0.25 mol/L. In this study, after evaluating sample corrosion morphology and acoustic emission parameters, appropriate concentration of SO₄²⁻ ions of 0.25 mol/L can effectively reduce the corrosion of 304 stainless steel in a 0.7 mol/L Cl⁻ solution.
- 304 stainless steel,
- containing Cl⁻ solution,
- pitting corrosion,
- SO₄²⁻ concentration,
- morphology,
- acoustic emission parameters

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References(20)

References

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