纳米氢氧化铜-油酸复合结构对铜的防腐蚀研究  

Corrosion Protection of Copper by Nano Copper Hydroxide-Oleic Acid Composite Coating

作　　者：高磊 孙志刚 刘少通 刘井坤 黄国胜[2] 程旭东[1] 曹棋 欧阳义波 GAO Lei;SUN Zhigang;LIU Shaotong;LIU Jingkun;HUANG Guosheng;CHENG Xudong;CAO Qi;OUYANG Yibo(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory for Marine Corrosion and Protection,Luoyang Ship Materials Research Institute,Qingdao 266237,China)

机构地区：[1]武汉理工大学材料科学与工程学院,湖北武汉430070 [2]中国船舶重工集团公司第七二五研究所海洋腐蚀与防护重点实验室,山东青岛266237

出　　处：《电镀与精饰》2020年第4期11-17,共7页Plating & Finishing

摘　　要：本文采用电化学沉积和氧化法制备了针状氢氧化铜纳米结构,经过高温反应形成了纳米氢氧化铜-油酸复合涂层。采用扫描电镜(SEM)、接触角测试仪(WCA)等检测手段对涂层不同阶段的形貌结构、润湿性进行了分析。采用电化学阻抗谱和极化曲线等方法研究了氢氧化铜和油酸在不同温度下制备涂层的耐腐蚀性能以及机械性能。结果表明,在80℃温度下制备的涂层,低频阻抗(Z0.01 Hz)比裸铜提高了4个数量级,并且自腐蚀电流密度下降5个数量级。此外,对涂层进行35次机械破坏试验后,腐蚀电流密度仍然为裸铜的1/5。因此,涂层能对铜起到较好的防腐蚀效果。In this paper,the needle nanostructured copper hydroxide was prepared by electrochemical deposition and oxidation,and the nano-copper hydroxide-oleic acid composite coating was formed after high temperature reaction.The morphology and wettability of the composite coating were studied by scan ning electron microscope(SEM)and water contact angle(WCA)tester,respectively.The corrosion re sistance and mechanical properties of the composite coatings prepared at different temperatures were in vestigated by electrochemical impedance spectroscopy(EIS)and polarization curve.The results showed that the low frequency impedance(Z0.01 Hz)of the coating prepared at 80℃was four orders of magnitude higher than that of bare copper and five orders of magnitude at corrosion current density.In addition,the corrosion current density of coated Cu was still 1/5 of bare Cu after 35 mechanical failure tests.There fore,the coating has a good corrosion prevention effect on Cu.

关 键 词：氢氧化铜 油酸 腐蚀 机械破坏 

分 类 号：TG174.4[金属学及工艺—金属表面处理]