材料研究学报  2013, Vol. 27 Issue (2): 212-218

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冷喷涂Cu-Cu2O涂层在海水中的电化学行为

丁锐1, 2 李相波1 王佳2, 3 许立坤1

1. 海洋腐蚀与防护重点实验室 中船重工七二五所 青岛 266101 2. 中国海洋大学化学化工学院 青岛 266100; 3. 金属腐蚀与防护国家重点实验室 沈阳 110016

Electrochemical Activities of Cold Spray Cu-Cu2O Coating in Seawater

DING Rui1, 2* LI Xiangbo1 WANG Jia2, 3 XU Likun1

1. Science and Technology on Marine Corrosion and Protection Laboratory, Luoyang Ship Material Research Institute(LSRMI), Qingdao 266101 2. Ocean University of China, Qingdao 266003 3. State Key Laboratory for Corrosion and Protection, Shenyang 110016,

丁锐 李相波, 王佳, 许立坤. 冷喷涂Cu-Cu₂O涂层在海水中的电化学行为[J]. 材料研究学报, 2013, 27(2): 212-218.
. Electrochemical Activities of Cold Spray Cu-Cu₂O Coating in Seawater[J]. Chinese Journal of Materials Research, 2013, 27(2): 212-218.

摘要 参考文献 相关文章 Metrics 全文: PDF(829 KB)   摘要: 用冷喷涂技术制备Cu-Cu2O涂层, 研究了其在不同海水环境下的极化行为, 并建立了涂层的腐蚀过程数学模型。结果表明: 在浸泡的初期Cu2O促进了涂层的局部腐蚀; 随着浸泡时间的增加局部腐蚀产物进一步促进了表面氧化膜的形成; 在非搅拌的静态环境下, 涂层的腐蚀受CuCl2-扩散的控制; Cl-促进了涂层的腐蚀, 阻碍氧化膜的形成, 且Cl-对CuCl的络合是Cl-浓度的一级反应; 在CuCl向Cu2O转变的过程中产生H+, 使电极表面附近溶液的pH值降低, 阻碍氧化膜的形成和降低耐久性, 而在溶液中加入Na2B4O7-H3BO4缓冲体系, 能有效地提高氧化膜的击破电位。根据本文提出的反应过程数学模型进行计算的结果, 与实验结果具有很好的相符性。 关键词 ： 材料失效与保护,  冷喷涂,  电化学腐蚀,  数学模型     Abstract： The Cu-Cu2O coating was prepared by Cold Spray Technology, polarization behavior of the coating in seawater was investigated and the corresponding mathematical model was established. The esults show that Cu2O promoted localized corrosion in the beginning and with the increase of the soaking time local corrosion products can promote film-forming. The corrosion of coating was controlled by CuCl2- diffusion in a static environment. Cl- promoted the corrosion of coating and hindered film-forming. Cl - CuCl complex is first order reaction of the Cl - concentration. H+ was produced in the transform process from CuCl to Cu2O, which reduced the pH value of solution nearby electrode surface and affected the forming and durability of the oxide film adversely. Existence of buffer solution can increase break potential of oxide film effectively. Mathematical model was established based on reaction course coincides with experimental results well. 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