Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> Solution
The purpose of this paper is to clarify the influence rule of Cl- concentration changes on the corrosion resistance of super 13Cr Martensite stainless steel.The influence of Cl- concentration on the corrosion potential of super 13Cr was compared and analyzed by electrochemical...
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Editorial Department of Materials Protection
2021-01-01
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| Series: | Cailiao Baohu |
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| Online Access: | http://www.mat-pro.com/fileup/1001-1560/PDF/202100106.pdf |
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| author | ZHAO Xue-hui, LIU Jun-lin, ZENG Rui-hua, XU Cong-min, XU Xiu-qing |
| author_facet | ZHAO Xue-hui, LIU Jun-lin, ZENG Rui-hua, XU Cong-min, XU Xiu-qing |
| author_sort | ZHAO Xue-hui, LIU Jun-lin, ZENG Rui-hua, XU Cong-min, XU Xiu-qing |
| collection | DOAJ |
| description | The purpose of this paper is to clarify the influence rule of Cl- concentration changes on the corrosion resistance of super 13Cr Martensite stainless steel.The influence of Cl- concentration on the corrosion potential of super 13Cr was compared and analyzed by electrochemical potentiometric test.In addition, the influence of Cl- concentration on the tensile strength, elongation and stress corrosion sensitivity index(ISSRT)of super 13Cr martensitic stainless steel under a certain slow tensile rate in saturated CO2 solutions were studied by the means of slow strain rate tensile(SSRT)SCC test, stress-strain curve(σ-ε)and scanning electron microscope(SEM).Furthermore, the fracture characteristics of the materials were researched by the fracture morphology.Results showed that in the saturated CO2 solution with Cl-concentration lower than 60 g/L, super 13Cr had little change in strength and toughness compared with that in the air, which belonged to the ductile fracture mode; with the increase of Cl- concentration, the fracture life and elongation of the material decreased gradually; the fracture mode of the material changed from the ductile fracture to the ductile brittle mixed fracture mode; when Cl- concentration increased to 90 g/L, the second crack began to appear at fracture side.When Cl- concentration was higher than 120 g/L, the pitting potential of the material decreased significantly, the pitting sensitivity increased, and the pitting phenomenon appeared on the side of the fracture, which further promoted the stress corrosion cracking. |
| format | Article |
| id | doaj-art-5ecaa37424a444309b4f12f55409cec2 |
| institution | OA Journals |
| issn | 1001-1560 |
| language | zho |
| publishDate | 2021-01-01 |
| publisher | Editorial Department of Materials Protection |
| record_format | Article |
| series | Cailiao Baohu |
| spelling | doaj-art-5ecaa37424a444309b4f12f55409cec22025-08-20T02:36:07ZzhoEditorial Department of Materials ProtectionCailiao Baohu1001-15602021-01-01541364410.16577/j.cnki.42-1215/tb.2021.01.006Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> SolutionZHAO Xue-hui, LIU Jun-lin, ZENG Rui-hua, XU Cong-min, XU Xiu-qing0(1.CNPC Tubular Goods Research Institute, State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Xi’an 710077, China; 2.Xi’an Jiaotong University, State Key Laboratory for Mechanical Behavior of Materials, Xi’an 710049, China;3.Drilling and Production Technology Research Institute of Qinghai Oilfield, Dunhuang 736202, China;4.Engineering and Technology Department of South Petroleum Exploration and Development Co., Ltd.,Haikou 570100, China;5.School of Materials Science and Engineering，Xi’an Shiyou University, Xi’an 710065, China)The purpose of this paper is to clarify the influence rule of Cl- concentration changes on the corrosion resistance of super 13Cr Martensite stainless steel.The influence of Cl- concentration on the corrosion potential of super 13Cr was compared and analyzed by electrochemical potentiometric test.In addition, the influence of Cl- concentration on the tensile strength, elongation and stress corrosion sensitivity index(ISSRT)of super 13Cr martensitic stainless steel under a certain slow tensile rate in saturated CO2 solutions were studied by the means of slow strain rate tensile(SSRT)SCC test, stress-strain curve(σ-ε)and scanning electron microscope(SEM).Furthermore, the fracture characteristics of the materials were researched by the fracture morphology.Results showed that in the saturated CO2 solution with Cl-concentration lower than 60 g/L, super 13Cr had little change in strength and toughness compared with that in the air, which belonged to the ductile fracture mode; with the increase of Cl- concentration, the fracture life and elongation of the material decreased gradually; the fracture mode of the material changed from the ductile fracture to the ductile brittle mixed fracture mode; when Cl- concentration increased to 90 g/L, the second crack began to appear at fracture side.When Cl- concentration was higher than 120 g/L, the pitting potential of the material decreased significantly, the pitting sensitivity increased, and the pitting phenomenon appeared on the side of the fracture, which further promoted the stress corrosion cracking.http://www.mat-pro.com/fileup/1001-1560/PDF/202100106.pdfsuper 13cr stainless steel; scc; stress-strain; fracture; pitting; cl<sup>-</sup> concentration; saturated co<sub>2</sub> solution |
| spellingShingle | ZHAO Xue-hui, LIU Jun-lin, ZENG Rui-hua, XU Cong-min, XU Xiu-qing Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> Solution Cailiao Baohu super 13cr stainless steel; scc; stress-strain; fracture; pitting; cl<sup>-</sup> concentration; saturated co<sub>2</sub> solution |
| title | Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> Solution |
| title_full | Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> Solution |
| title_fullStr | Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> Solution |
| title_full_unstemmed | Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> Solution |
| title_short | Effect of Cl<sup>-</sup> Concentration on the Stress Corrosion Sensitivity of Martensitic Stainless Steel in Saturated CO<sub>2</sub> Solution |
| title_sort | effect of cl sup sup concentration on the stress corrosion sensitivity of martensitic stainless steel in saturated co sub 2 sub solution |
| topic | super 13cr stainless steel; scc; stress-strain; fracture; pitting; cl<sup>-</sup> concentration; saturated co<sub>2</sub> solution |
| url | http://www.mat-pro.com/fileup/1001-1560/PDF/202100106.pdf |
| work_keys_str_mv | AT zhaoxuehuiliujunlinzengruihuaxucongminxuxiuqing effectofclsupsupconcentrationonthestresscorrosionsensitivityofmartensiticstainlesssteelinsaturatedcosub2subsolution |