热喷涂Zn-Ni复合涂层在海水中的腐蚀行为研究

中国腐蚀与防护学报

2013, Vol. 33

Issue (1): 29-35

技术报告

本期目录 | 过刊浏览

热喷涂Zn-Ni复合涂层在海水中的腐蚀行为研究

王应发^1,2 ,黄国胜² ,程旭东¹ ,李相波² ,邢路阔² ,郭娟^2,3 ,马焱⁴

1. 武汉理工大学材料复合新技术国家重点实验室武汉 430070;
2.中船重工七二五所青岛分部海洋腐蚀与防护重点实验室青岛 266101;
3. 山东大学化学与化工学院济南 250100;
4. 青岛双瑞海洋环境工程股份有限公司青岛 266101;

Research of Corrosion Behavior of Thermal Spraying Zn-Ni Composite Coating in Seawater

WANG Yingfa^{1, 2}, HUANG Guosheng², CHENG Xudong¹, LI Xiangbo², XING Lukuo², GUO Juan^{2, 3}, MA Yan⁴

1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;
2. Science and Technology on Marine Corrosion and Protection Laboratory, Luoyang Ship Material Research Institute(LSRMI), Qingdao 266101, China;
3. School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China;
4. Sunrui Marine Environment Engineering Co., Ltd, Qingdao 266101, China;

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摘要:

利用喷雾干燥法制备了不同Ni含量的团聚型Zn-Ni复合粉末，并在此基础上用氧乙炔火焰喷涂工艺制备了Zn-Ni复合涂层。通过动电位极化和电化学阻抗测试，并结合SEM、EDS和XRD分析，研究涂层在海水介质中的防护性能和腐蚀机理。结果表明：涂层的自腐蚀电位稳定值在-0.98~-0.95 V，Ni可起到稳定Zn(OH)₂，抑制其向疏松ZnO转化的作用，腐蚀产物的堆积使得涂层电阻R_c和电荷转移电阻R_t不断增大，腐蚀电流不断减小；不同Ni含量涂层的耐蚀性存在明显差异，其中Ni含量为20 mass%的涂层耐蚀性能最好。

关键词 ：氧乙炔火焰喷涂, Zn-Ni复合涂层, 动电位极化, 电化学阻抗, 耐蚀性能

Abstract：

In order to improve the corrosion resistance of coating and prolong its life in the marine environment. Zn-Ni composite coatings including different nickel content were prepared by oxyacetylene flame spraying process, with Zn-Ni composite powders which were prepared by spray-dried process. The protection performance and corrosion mechanism of the Zn-Ni composite coatings in seawater were tested by means of potentiodynamic polarization and electrochemical impedance, and with the analysis of SEM, EDS and XRD. Results shown that the stable corrosive potential of the coatings finally ranges from -0.98 V to -0.95 V. The presence of nickel can play a role that restrain the dense Zn(OH)₂ to be converted into the loose ZnO. At the same time, the coatings resistance R_c and charge transfer resistance R_t are both being increased and causing the coatings corrosion current being decreased gradually with the accumulation of corrosion products. Corrosion resistances of these coatings with different nickel content are obviously different, and the anti-corrosion properties of the coating with 20 mass% Ni is best.

Key words： oxyacetylene flame spraying Zn-Ni composite coating potentiodynamic polarization electrochemical impedance corrosion resistance

ZTFLH:

TG174.44

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引用本文:

王应发,黄国胜,程旭东,李相波,邢路阔,郭娟,马焱. 热喷涂Zn-Ni复合涂层在海水中的腐蚀行为研究[J]. 中国腐蚀与防护学报, 2013, 33(1): 29-35.
WANG Yingfa, HUANG Guosheng, CHENG Xudong, LI Xiangbo, XING Lukuo, GUO Juan, MA Yan. Research of Corrosion Behavior of Thermal Spraying Zn-Ni Composite Coating in Seawater. Journal of Chinese Society for Corrosion and protection, 2013, 33(1): 29-35.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I1/29

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