极化电位对铜系防污涂层性能的影响
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摘要
采用电化学阻抗谱研究了外加0.0、-0.7和-0.9 V(相对于饱和甘汞电极)极化电位对铜系防污涂层在青岛海域海水中防护性能的影响,采用三维电子显微镜对涂层腐蚀形貌进行观察,以原子吸收分光光度计测量介质中铜元素的含量来表征防污剂(氧化亚铜)的溶解速率,并进行了6个月的实海试验。结果表明,极化电位加速了涂层的阴极剥离过程,明显降低了其防腐和防污性能。
The effect of polarization potential, i.e. 0.0,-0.7, or-0.9 V(vs. saturated calomel electrode), on protective property of copper-based antifouling coating in seawater around Qingdao was studied by electrochemical impedance spectroscopy. The surface corrosion morphology was observed using three-dimensional electron microscope. The dissolution rate of antifouling agent, i.e. copper(I) oxide, was characterized by determination of copper content in the medium by atomic absorption spectrophotometry. A real sea trial was conducted for 6 months. The results showed that the application of polarization potential accelerated the cathodic delamination of the coating and reduced its anticorrosion and antifouling properties greatly.
The effect of polarization potential, i.e. 0.0,-0.7, or-0.9 V(vs. saturated calomel electrode), on protective property of copper-based antifouling coating in seawater around Qingdao was studied by electrochemical impedance spectroscopy. The surface corrosion morphology was observed using three-dimensional electron microscope. The dissolution rate of antifouling agent, i.e. copper(I) oxide, was characterized by determination of copper content in the medium by atomic absorption spectrophotometry. A real sea trial was conducted for 6 months. The results showed that the application of polarization potential accelerated the cathodic delamination of the coating and reduced its anticorrosion and antifouling properties greatly.
引文
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[14]于雪艳,王科,陈正涛,等.防污涂料中氧化亚铜的渗出速率及降解行为研究[J].涂料工业, 2012, 42(7):45-48, 52.
[15]SUN H Y, LIU S, SUN L J. A comparative study on the corrosion of galvanized steel under simulated rust layer solution with and without 3.5wt%NaCl[J].International Journal of Electrochemical Science, 2013, 8(3):3494-3509.
[16]刘栓,孙虎元,孙立娟. pH值和温度对镀锌钢在模拟锈层溶液中电化学腐蚀行为的影响[J].功能材料, 2013, 44(6):858-861, 865.
[2]高志强,江社明,张启富,等.含氟低表面能海洋防污涂料的研究进展[J].电镀与涂饰, 2017, 36(6):273-279.
[3]周佳骏,李学玲,李霞,等.有机硅改性环保海洋防污涂层的发展现状[J].涂料工业, 2016, 46(6):75-80.
[4]董磊,于良民,姜晓辉,等.氧化亚铜的疏水改性及其对防污涂料性能的影响[J].中国腐蚀与防护学报, 2008, 28(1):20-24.
[5]DE SARAVIA S G G, DE MELE M F L, VIDELA H A, et al. Bacterial biofilms on cathodically protected stainless steel[J]. Biofouling, 1997, 11(1):1-17.
[6]PEREZ M, GERVASI C A, ARMA R, et al. The influence of cathodic currents on biofouling attachment to painted metals[J]. Biofouling, 1994, 8(1):27-34.
[7]LIU S, GU Y, WANG S L, et al. Degradation of organic pollutants by a Co3O4–graphite composite electrode in an electro-Fenton-like system[J]. Chinese Science Bulletin, 2013, 58(19):2340-2346.
[8]LEBRINI M, FONTAINE G, GENGEMBRE L, et al. Corrosion behaviour of galvanized steel and electroplating steel in aqueous solution:AC impedance study and XPS[J]. Applied Surface Science, 2008, 254(21):6943-6947.
[9]LIAO X N, CAO F H, ZHENG LY, et al. Corrosion behaviour of copper under chloride-containing thin electrolyte layer[J]. Corrosion Science, 2011, 53(10):3289-3298.
[10]HUANG H L, DONG Z H, CHEN Z Y, et al. The effects of Cl-ion concentration and relative humidity on atmospheric corrosion behaviour of PCB-Cu under adsorbed thin electrolyte layer[J]. Corrosion Science, 2011, 53(4):1230-1236.
[11]曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社, 2002:154-166.
[12]LIU S, SUN H Y, SUN L J, et al. Effects of pH and Cl-concentration on corrosion behavior of the galvanized steel in simulated rust layer solution[J].Corrosion Science, 2012, 65(5):520-527.
[13]王玉琼,刘栓,刘兆平,等.石墨烯掺杂水性环氧树脂的隔水和防护性能[J].电镀与涂饰, 2015, 34(6):314-319.
[14]于雪艳,王科,陈正涛,等.防污涂料中氧化亚铜的渗出速率及降解行为研究[J].涂料工业, 2012, 42(7):45-48, 52.
[15]SUN H Y, LIU S, SUN L J. A comparative study on the corrosion of galvanized steel under simulated rust layer solution with and without 3.5wt%NaCl[J].International Journal of Electrochemical Science, 2013, 8(3):3494-3509.
[16]刘栓,孙虎元,孙立娟. pH值和温度对镀锌钢在模拟锈层溶液中电化学腐蚀行为的影响[J].功能材料, 2013, 44(6):858-861, 865.
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