带锈青铜表面超疏水薄膜的制备及防腐性能研究  

Preparation and Anti-corrosion Performance of Super-hydrophobic Film on the Surface of Bronze Covered with Patina

作　　者：汪敏[1] 蔡兰坤[1] 唐艺婧 蔡晶芳 周浩[2] 吴来明[2] 闫莹[1,3] WANG Min;CAI Lan-kun;TANG Yi-jing;CAI Jing-fang;ZHOU Hao;WU Lai-ming;YAN Ying(State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,East China University of Science and Technology,Shanghai 200237,China;Key Scientific Research Base of Museum Environment,State Administration for Cultural Heritage,Shanghai Museum,Shanghai 200050,China;Shandong Key Laboratory of Corrosion Science,The Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266000,China)

机构地区：[1]华东理工大学国家环境保护化工过程环境风险评价与控制重点实验室,上海200237 [2]上海博物馆馆藏文物保存环境国家文物局重点科研基地,上海200050 [3]中国科学院海洋研究所山东省腐蚀科学重点实验室,山东青岛266000

出　　处：《表面技术》2020年第11期50-57,123,共9页Surface Technology

基　　金：国家自然科学基金(51671117);国家重点研发计划(2020YFC1522502);山东省腐蚀科学重点实验室开放课题;大学生创新创业训练计划项目。

摘　　要：目的研究带Cu2O锈青铜表面超疏水薄膜的制备工艺及其防腐性能。方法采用直接浸泡法,在带氧化亚铜锈层青铜试片表面制备了超疏水薄膜,通过单因素实验分别考察了正十二硫醇-十四酸混合溶液配比以及浸泡时间对超疏水膜层构建及耐蚀性能的影响,并采用接触角测试、电化学方法及表面分析手段对膜层性质、结构及稳定性进行了评价。结果正十二硫醇和十四酸的疏水长链成功组装到带Cu2O锈青铜表面。混合溶液含5.0 nmol/L的正十二硫醇和1.0 nmol/L的十四酸,浸泡时间为1 h,是超疏水薄膜的最佳制备条件,此时表面接触角为157.2°,缓蚀效率高达97.21%。同时,电化学阻抗谱结果显示,电荷转移电阻相较于超疏水处理前增大了2个数量级,表明该膜层具有良好的耐蚀性能。该膜层在大气模拟液中浸泡30 d后,缓蚀效率仍有96.56%,说明其稳定性优异。结论带Cu2O锈青铜表面构建的超疏水薄膜能够有效提高其耐腐蚀性和疏水性。The work aims to study the preparation process and anti-corrosion performance of super-hydrophobic(SH)film on the surface of bronze with Cu2O.Straightforward immersion method was adopted to prepare the SH film on the surface of bronze with Cu2O.The effect of the ratio of n-dodecyl mercaptan to myristic acid and immersion time on the construction and corrosion resistance of SH film was investigated by single factor experiments.The contact angle test,electrochemical measurement method and surface analysis means were used to evaluate the surface properties,structure and stability of SH film.Hydrophobic long chains of n-dodecyl mercaptan and myristic acid were assembled on the surface of bronze with Cu2O.The optimal preparation conditions of SH film included a mixed solution of 5.0 nmol/L n-dodecyl mercaptan and 1.0 nmol/L myristic acid and an immersion time of 1.0 h.Under the above conditions,the contact angle and corrosion inhibition efficiency reached 157.2°and 97.21%respectively.At the same time,the electrochemical impedance spectroscopy suggested that,the SH film had good corrosion resistance when the charge transfer resistance increased by two orders of magnitude.The corrosion efficiency of the SH film still reached 96.56%after immersion in atmospheric simulation solution for 30 d,indicating the excellent stability.The SH film constructed on the surface of bronze with Cu2O can effectively improve the corrosion resistance and hydrophobicity.

关 键 词：青铜 超疏水 直接浸泡 耐蚀性 稳定性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]