Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless Steel
The effect of copper (Cu) on hot-rolled 301 austenitic stainless steel (ASS) was studied by observing the microstructures and testing the electrochemical corrosion resistance properties. The results showed that, with the increase in Cu content, the size of shear zones in 301 ASS decreased, and the n...
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MDPI AG
2023-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/1/170 |
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| author | Na Li Hangxin Yan Xuyuan Wang Lei Xia Yuchuan Zhu Yan Li Zhengyi Jiang |
| author_facet | Na Li Hangxin Yan Xuyuan Wang Lei Xia Yuchuan Zhu Yan Li Zhengyi Jiang |
| author_sort | Na Li |
| collection | DOAJ |
| description | The effect of copper (Cu) on hot-rolled 301 austenitic stainless steel (ASS) was studied by observing the microstructures and testing the electrochemical corrosion resistance properties. The results showed that, with the increase in Cu content, the size of shear zones in 301 ASS decreased, and the number increased, which increased the uniformity of the microstructure macroscopically. The presence of Cu decreased the stacking fault energy of 301 ASS at elevated temperatures. Meanwhile, the amount of chromium (Cr) carbides decreased gradually with the increase in Cu content, which implies that the solid solution of Cu in hot-rolled 301 stainless steel promotes the solid solution of Cr and C in the steel, which is conducive to the formation of Cr-rich passivation films. As a result, the corrosion resistance of hot rolled Cu-bearing 301 stainless steel is improved, with both lower corrosion current density (<i>I<sub>corr</sub></i>) and passivation current (<i>I<sub>pass</sub></i>), and more positive corrosion potentials (<i>E<sub>corr</sub></i>) and passivation potential (<i>E<sub>p</sub></i>), even though it does not show a higher pitting resistance. As Cu content in the steel was increased from 0.4% to 1.1%, the corrosion resistance was not further improved. |
| first_indexed | 2024-03-09T11:41:38Z |
| format | Article |
| id | doaj.art-8c6a85bd53ea4046a59abdf2c3e20c7f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T11:41:38Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-8c6a85bd53ea4046a59abdf2c3e20c7f2023-11-30T23:31:42ZengMDPI AGMetals2075-47012023-01-0113117010.3390/met13010170Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless SteelNa Li0Hangxin Yan1Xuyuan Wang2Lei Xia3Yuchuan Zhu4Yan Li5Zhengyi Jiang6School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, ChinaSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, ChinaSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, ChinaSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, ChinaSchool of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, ChinaState Key Laboratory of Metal Material for Marine Equipment and Application, Iron & Steel Research Institutes of Ansteel Group Corporation, Anshan 114009, ChinaSchool of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, AustraliaThe effect of copper (Cu) on hot-rolled 301 austenitic stainless steel (ASS) was studied by observing the microstructures and testing the electrochemical corrosion resistance properties. The results showed that, with the increase in Cu content, the size of shear zones in 301 ASS decreased, and the number increased, which increased the uniformity of the microstructure macroscopically. The presence of Cu decreased the stacking fault energy of 301 ASS at elevated temperatures. Meanwhile, the amount of chromium (Cr) carbides decreased gradually with the increase in Cu content, which implies that the solid solution of Cu in hot-rolled 301 stainless steel promotes the solid solution of Cr and C in the steel, which is conducive to the formation of Cr-rich passivation films. As a result, the corrosion resistance of hot rolled Cu-bearing 301 stainless steel is improved, with both lower corrosion current density (<i>I<sub>corr</sub></i>) and passivation current (<i>I<sub>pass</sub></i>), and more positive corrosion potentials (<i>E<sub>corr</sub></i>) and passivation potential (<i>E<sub>p</sub></i>), even though it does not show a higher pitting resistance. As Cu content in the steel was increased from 0.4% to 1.1%, the corrosion resistance was not further improved.https://www.mdpi.com/2075-4701/13/1/170301 austenitic stainless steelcopperhot-rolled microstructurestacking fault energycorrosion resistance |
| spellingShingle | Na Li Hangxin Yan Xuyuan Wang Lei Xia Yuchuan Zhu Yan Li Zhengyi Jiang Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless Steel Metals 301 austenitic stainless steel copper hot-rolled microstructure stacking fault energy corrosion resistance |
| title | Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless Steel |
| title_full | Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless Steel |
| title_fullStr | Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless Steel |
| title_full_unstemmed | Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless Steel |
| title_short | Effect of Copper on Microstructure and Corrosion Resistance of Hot Rolled 301 Stainless Steel |
| title_sort | effect of copper on microstructure and corrosion resistance of hot rolled 301 stainless steel |
| topic | 301 austenitic stainless steel copper hot-rolled microstructure stacking fault energy corrosion resistance |
| url | https://www.mdpi.com/2075-4701/13/1/170 |
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