摘要
本工作采用不同浓度的乙二胺四乙酸(EDTA)和酒石酸钾钠(PST)溶液对青铜合金表面锈蚀进行清洗实验,并对清洗效果进行探讨和评价。电化学测试结果表明,相同浓度的EDTA溶液对基体的腐蚀速率小于酒石酸钾钠,两者的腐蚀速率均随着溶液浓度的增大而增大;SEM和XRD结果表明,168 h酒石酸钾钠完全有效清除绿色有害锈层,试样表面露出了Cu_(2)O和SnO_(2)锈层,EDTA部分有效清除绿色锈层,两种溶液清洗后试样表面均无新物质生成。EDTA和酒石酸钾钠均为螯合剂,两者螯合配位形式和成环结构不同,造成对Cu^(2+)吸附能力不同,导致两者的实际清洗效果存在差异。
In order to analyze the rust removal effect of simulated bronze corrosion and discuss its mechanism,different concentrations of EDTA and potassium sodium tartrate were investigated.Electrochemical test results show that the corrosion rates of both increases with the increase of solution concentration,and EDTA solution with the same concentration are lower than that of potassium sodium tartrate.SEM and XRD results show that 168 h potassium sodium tartrate effectively removes the green harmful rust layer,and the surface of the sample reveals the Cu_(2)O and SnO_(2)rust layer,while EDTA partly remove the green rust layer,no new substances formed on the sample surface after cleaning.Both EDTA and potassium sodium tartrate are chelating agents.The chelation coordination form and ring formation structures are different,which result in diffe-rent adsorption capacity for Cu^(2+),and make obvious different cleaning effect.
作者
毕江元
宋述鹏
丁兴
柯德庆
周和荣
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)
出处
《材料导报》
CSCD
北大核心
2023年第19期182-187,共6页
Materials Reports
基金
国家重点研发计划(2020YFC1522000)。
