氯离子对铜腐蚀影响的质谱方法学研究  

Study on Influence of Chloride Ions on Copper Corrosion by Mass Spectrometry

作　　者：吴雨华 WU Yu-hua(School of Chemistry and Chemical Engineering,Xi'an Shiyou University,Shaanxi Xi'an 710065,China)

机构地区：[1]西安石油大学化学化工学院,陕西西安710065

出　　处：《广州化工》2023年第20期86-91,共6页GuangZhou Chemical Industry

摘　　要：青铜器在长时间的埋藏或保存过程中易受到环境等因素的影响存在着不同程度的腐蚀现象,导致文物价值降低。为了保护这些珍贵文物,有必要深入研究影响青铜器腐蚀的因素。采用便携式纸基电喷雾电离源质谱技术在负离子模式下考察了NaCl和H_(2)O两个因素对铜腐蚀的影响,结果发现随着NaCl和H_(2)O含量的增加腐蚀呈现出先增加后减小的趋势,其中当含有0.05%NaCl和1%H_(2)O时铜的腐蚀最严重;同时发现腐蚀初期Cu+易与Cl-结合形成CuCl-2,进而转化为CuCl_(3)^(-),最后再转化为Cu_(2)Cl_(3)^(-),说明了Cl-对铜腐蚀有着较为严重的影响,该方法具有分析灵敏度高,操作简单的优点。如上结果为指导青铜器腐蚀防治提供了新的理解和参考,也为了解青铜器的制作工艺和历史价值提供了新的线索和证据。In the process of long-term burial or preservation,bronzes were susceptible to environmental factors,and there were different degrees of corrosion,which led to the decline of cultural relics value.In order to protect these precious cultural relics,it was necessary to deeply study the factors affecting the corrosion of bronzes.The effects of NaCl and H_(2)O on copper corrosion were investigated by using portable paper-based electrospray ionization source mass spectrometry in negative ion mode.The results showed that with the increase of NaCl and H_(2)O content,the corrosion tended to first increase and then decrease,and the corrosion of copper was the most serious when the content of 0.05%NaCl and 1%H_(2)O was increased.At the same time,it was found that Cu+was easily combined with Cl-to form CuCl-2 at the initial corrosion stage,and then transformed into CuCl_(3)^(-) and finally into Cu 2 Cl_(3)^(-),indicating that Cl-had a relatively serious impact on copper corrosion.The method had the advantages of high sensitivity and simple operation.The above results provided a new understanding and reference for guiding the corrosion prevention of bronzes,and also provided new clues and evidence for understanding the production process and historical value of bronzes.

关 键 词：质谱 负离子模式 铜腐蚀影响因素 NACL H_(2)O 

分 类 号：O657.7[理学—分析化学]