十八硫醇自组装膜对青铜-银电偶腐蚀的抑制作用(稿号12100).PDF

中国腐蚀与防护学报 Journal of Chinese Society for Corrosion and Protection 十八硫醇自组装膜对青铜-银电偶腐蚀的抑制作用 (稿号 12100) 1 2 2 2 2 万俐 杜伟 李佳佳 丁毅 陈步荣 (1．南京博物院 南京 210016；2．南京工业大学材料科学与工程学院 南京 210009) 摘 要：针对错银铜器的青铜－银电偶腐蚀问题，采用十八硫醇(ODT) 的乙醇溶液在青铜和银表面制备了自组装膜 （SAMs ）。通 过测量青铜－银的电偶电流和室内加速变色试验，研究了自组装前后的电偶腐蚀性能，采用X 光电子能谱 （XPS ）、Tafel 极化曲 线法和微分电容法初步研究了ODT SAMs 的作用机理。结果表明：ODT 分子通过硫原子与基体形成硫醇盐，吸附在青铜和银表 面形成自组装膜，该自组装膜在3.5%NaCl 溶液和含硫大气中，能够有效抑制青铜和银之间的电偶腐蚀，属于混和型缓蚀剂。 关键词：十八硫醇；自组装膜；电偶腐蚀；青铜；银 1 中图分类号：TG172.3 文献标识码： A 文章编号： v 8 INHIBITION EFFECTs OF THE ODTADECANETHIOL SELF-ASSEMBLED 6 4 0 MONOLAYERS FOR BRONZE-SILVER GALVANIC CORROSION 0 . 1 2 2 2 2 1 WAN Li , DU Wei , LI Jiajia , DING Yi , CHEN Burong 1 6 1. Nanjing Museum, Nanjing 210016 China; 1 0 2. College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009 China 2 : v Abstract ：In order to solve the galvanic corrosion problem between bronze and silver, the self-assemble i X monolayers(SAMs) of odtadecanrthiol (ODT) was prepared on the surfaces of bronze and silver. The galvanic a corrosion between bronze and silver were investigated by couple corrosion current and accelerated discoloration test. n Corrosion inhibition and function mechanism of ODT SAMs were investigated by X-ray photoelectron spectroscopy i h (XPS), polarization curves and differential capacity methods. The results showed that ODT molecular adsorbed on the c surface of bronze and silver to form SAMs through the formation of thiolate. In a solu