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| Effect of surface treatment on pitting corrosion resistance of 316L stainless steel for offshore engineering |
| ZHONG Qiang1,2, QIAN Jiong1,2, WU Jing-na1, ZHAO Xin-hua1, MA Rong-li1, LIU Zheng-dong1 |
1. Zhejiang Jiuli Hi-Tech Metals Co., Ltd., Huzhou 313028, Zhejiang, China;
2. Jiuli International Science and Technology Cooperation Base for Special Alloy Material Corrosion and Protection, Huzhou 313028, Zhejiang, China |
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Abstract 316L stainless steel is a commonly used corrosion-resistant alloy material, however, it is prone to pitting corrosion in the marine and atmospheric service environment. The pitting corrosion resistance of 316L tubes after various surface treatments (bright annealing, polishing and pickling passivation) was evaluated by pitting rate, critical pitting temperature, pitting potential and polarization curve test. The results show that different surface treatments have no significant influence on the critical pitting temperature, but the pitting rate and pitting potential will differ. Polishing and pickling passivation can effectively improve the pitting corrosion resistance of 316L stainless steels, of which the pickling passivation state has the best pitting resistance, so it is recommended that the 316L stainless steel products for offshore engineering should be pickling passivation treatment before use.
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Received: 21 February 2022
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2022, Vol. 32 
