AMT及其复配剂对青铜合金的缓蚀机理研究  

Study on Corrosion Inhibition Effect and Mechanism of AMT and Its Compound on Bronze Alloy

作　　者：毕江元 宋述鹏[1,2] 丁兴 柯德庆[1] 周和荣[1] BI Jiangyuan;SONG Shupeng;DING Xing;KE Deqing;ZHOU Herong(State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;College of Materials Science and Metallurgical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081 [2]武汉科技大学材料与冶金学院,武汉430081

出　　处：《材料导报》2024年第11期173-178,共6页Materials Reports

基　　金：国家重点研发计划(2020YFC1522000)。

摘　　要：青铜文物是国之瑰宝,其组织成分主要是青铜合金,本工作以青铜合金为研究对象,对合金表面的缓蚀效率及机理进行实验探索,为青铜文物保护材料的性能研究提供实验支持。采用失重法和电化学极化测试研究了2-氨基-5-巯基-1,3,4-噻二唑(AMT)复配尿素和三聚氰胺作为青铜合金缓蚀剂的缓蚀效率。失重实验结果表明,随着AMT浓度的增大,试样在三组实验腐蚀溶液中缓蚀效率均上升,其中1%AMT复配尿素组在NaCl溶液中的缓蚀效率为最大。电化学分析结果表明,随着加入电解液中AMT浓度的增加,1%AMT复配尿素组的腐蚀电位比1%AMT组上升了0.08 V,缓蚀效率为89.8%。采用SEM和XPS对试样表面含Cu的AMT缓蚀膜进行了分析,并对缓蚀机理进行探讨,结果表明,铜离子与AMT反应生成Cu(I)-AMT络合物,吸附在青铜表面起到缓蚀作用。Bronze cultural relics were the national treasure, and its structural composition was mainly bronze alloy. This article taken bronze alloys as the research object to explore the corrosion inhibition efficiency and mechanism of alloy surfaces, provided experimental support for the research on the performance of bronze heritage protection materials. The slow-release efficiency of 2-amino-5-mercapto-1, 3, 4-thiadiazole (AMT) combined urea and melamine as corrosion inhibitor for bronze alloy was studied by weight-loss method and electrochemical polarization test. The results showed that with the increase of AMT concentration, the slow-release efficiency of the sample in the three groups of experimental corrosion solution increased, and the slow-release efficiency of the 1%AMT compound urea group was the highest ones in NaCl solution. The results of electrochemical analysis showed that with the increase of AMT concentration in the electrolyte, the corrosion potential of 1%AMT combined urea group was 0.08 V higher than that of 1%AMT group, and the corrosion inhibition efficiency was 89.8%. SEM and XPS were used to analyze the AMT corrosion inhibitor film containing Cu on the surface of the sample, and the slow release mechanism was discussed. The results show that copper ions react with AMT to form Cu (I) - AMT complexes, which act as corrosion inhibitors on the surface of bronze.

关 键 词：青铜合金 缓蚀效率 尿素 三聚氰胺 缓蚀机理 

分 类 号：TG178[金属学及工艺—金属表面处理]