Zn-Ni-Ag复合镀层在硫酸盐还原菌条件下的腐蚀特性
Corrosion Characteristics of Zn-Ni-Ag Composite Coating under Sulfate Reducing Bacteria Condition
摘 要
采用电沉积方法在20钢表面制备了Zn-Ni-Ag复合镀层，并通过静态挂片试验及电化学测试研究了Zn-Ni-Ag镀层以及20钢在硫酸盐还原菌（SRB）条件下的腐蚀行为。结果表明：Zn-Ni-Ag镀层对SRB的生长有一定的抑制效果，挂片试验10 d后，20钢体系中SRB数量为13×107个/mL，而Zn-Ni-Ag镀层体系中的SRB数量为5.0×107个/mL；在SRB环境中，Zn-Ni-Ag镀层具有良好的耐蚀性，腐蚀速率始终保持在较低水平，且一直低于20钢的腐蚀速率。在SRB环境中，Zn-Ni-Ag镀层的耐腐蚀性能稳定，可以对碳钢提供保护作用。
硫酸盐还原菌(SRB)
20钢
防腐蚀
Zn-Ni-Ag composite coating
sulfate reducing bacteria (SRB)
20 steel
corrosion protection
Abstract
A Zn-Ni-Ag composite coating was prepared on the surface of 20 steel by electrodeposition method, and the corrosion behavior of the Zn-Ni-Ag coating and 20 steel under sulfate reducing bacteria (SRB) conditions was studied through static coupon test and electrochemical test. Results showed that the Zn-Ni-Ag coating had a certain inhibitory effect on the growth of SRB. After 10 days of coupon test, the number of SRB in 20 steel system was stable at 13×107/mL, while the number of SRB in Zn-Ni-Ag coating system was stable at 5.0×107/mL. In the SRB environment, the Zn-Ni-Ag coating had good corrosion resistance, and the corrosion rate was always kept at a low level, and was always lower than that of 20 steel. The corrosion resistance of the Zn-Ni-Ag coating was stable in the SRB environment. Therefore, the Zn-Ni-Ag coating could provide protection for carbon steel in the presence of SRB.
中图分类号 TG178 DOI 10.11973/fsyfh-202211004
所属栏目 试验研究
基金项目 四川省油气应用化学重点实验室开放项目（YQKF201406）
收稿日期 2020/9/30
修改稿日期
网络出版日期
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引用该论文: TAN Peng,ZENG Yuxiang,QIU Haiyan,YUE Ming,LAN Guihong,XU Bo. Corrosion Characteristics of Zn-Ni-Ag Composite Coating under Sulfate Reducing Bacteria Condition[J]. Corrosion & Protection, 2022, 43(11): 17
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【7】ZHAI X F, MA X M, MYAMINA M, et al.Electrochemical study on 4, 5-dichloro-2-n-octyl-4-isothiazolin-3-one-added zinc coating in phosphate buffer saline medium with Escherichia coli[J].Journal of Solid State Electrochemistry, 2015, 19(8):2213-2222.
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【11】吴迪, 孟祥春, 张瑞泉, 等.胶态FeS颗粒在电脱水器油水界面上的沉积与防治[J].油田化学, 2001, 18(4):317-319, 341.
【12】蔡靖, 郑平, 张蕾.硫酸盐还原菌及其代谢途径[J].科技通报, 2009, 25(4):427-431.
【13】GALLAGHER K L, KADING T J, BRAISSANT O, et al.Inside the alkalinity engine:the role of electron donors in the organomineralization potential of sulfate-reducing bacteria[J].Geobiology, 2012, 10(6):518-530.
【14】SANTANA RODRÍGUEZ J J, SANTANA HER-NÁNDEZ F J, GONZÁLEZ GONZÁLEZ J E.Comparative study of the behaviour of AISI 304 SS in a natural seawater hopper, in sterile media and with SRB using electrochemical techniques and SEM[J].Corrosion Science, 2006, 48(5):1265-1278.
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【17】于利宝, 闫茂成, 马健, 等.富Fe红壤中管线钢的硫酸盐还原菌腐蚀行为[J].金属学报, 2017, 53(12):1568-1578.
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