文献类型：期刊文献

英文题名：A study on corrosion products and processes of patinated tin bronze in formic acid

作者：Yan, Ying[1];Zou, Cong[1];Zhang, Lehua[1,3];Zhu, Yan[1];Wu, Laiming[2];Zhou, Hao[2];Cai, Lankun[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Coll Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Shanghai Museum, Shanghai 200050, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200237, Peoples R China

年份：2020

卷号：46

期号：11

起止页码：5087

外文期刊名：RESEARCH ON CHEMICAL INTERMEDIATES

收录：;EI(收录号：20203909240717);WOS:【SCI-EXPANDED(收录号:WOS:000572594500001)】；

基金：This work was sponsored by the National Nature Science Foundation of China (51671117). The authors would like to acknowledge the teachers at Analysis and Testing Center, East China University of Science and Technology, for their help in XRD/SEM/Raman examination.

语种：英文

外文关键词：Tin bronze; SEM; XRD; Raman; Formic acid corrosion

摘要：The corrosion processes of bare bronze and three types of patina-bearing tin bronze in the presence of formic acid have been explored through laboratory exposure. Following exposure time of 4, 14 and 28 days, the morphology and composition of the corrosion products on the sample were characterized to investigate their evolution by using SEM, XRD and Raman. The results indicated that Cu2O was first generated on the bare bronze surface, then Cu(OH)(2)was formed at the early stage of the corrosion and as the exposure time increased, Cu(OH)(HCOO) and Cu(HCOO)(2)were further generated. Bronze with Cu2O layer was destroyed by formic acid and converted into Cu(HCOO)(2), which was similar to the conversion process of corrosion products of bare bronze, except that, the account of products of bronze patinated with Cu2O was more than that of bare bronze, indicating that the Cu2O layer on the sample surface was destroyed and further transformed. The main corrosion product of bronze with CuCl patina was Cu-2(OH)(3)Cl, which was consistent with the reaction process of powdery rust. For bronze with mixed patina, two corrosion processes of Cu2O patina and CuCl patina proceed at the same time, and the corrosion products were Cu(HCOO)(2)and Cu-2(OH)(3)Cl, which were basically consistent with the corrosion behavior of bronze covered with a Cu2O and a CuCl patina.