氯化亚铜氧化反应的化学动力学初探  

A PRELIMINARY APPROACH TO THE CHEMICAL KINETICS OF CuCl OXIDIZATION

作　　者：范崇正[1] 王昌燧[1] 赵化章[1] 王胜君[1] 

机构地区：[1]中国科学技术大学近代化学系,合肥230026

出　　处：《物理化学学报》1992年第5期685-689,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金;中国科技大学结构分析开放实验室课题

摘　　要：多数被发掘的古代青铜文物表面都附着有某些钢锈,其中以粉状锈(Cu_2(OH)_3Cl)对铜器的腐蚀最为严重.迄今已有一些文献介绍粉状锈的生成机理,但对其反应过程的动力学研究尚未见报导。作为青铜合金中含量最丰的元素铜,被氧化腐蚀是分步进行的.本工作主要用X-光衍射及分光光度法对一价铜锈CuCl在潮湿环境中进行氧化反应的速度常数及表观活化能进行测定核算;对反应的中间产物及伴随现象进行分析探讨。XRD and SPM techniques were used to identify the products and reaction ratesfor CuCl oxidization. The results showed tbe reaction between CuCl,O_2 and H_2O israpid at ambient conditions. The bronze powder-corrosion with Cu (Ⅱ) formedthrough the corrosion with Cu(Ⅰ)such as(CuCl),as soon as the Cu_2(OH)_3Cl once for-med, Cu(Ⅱ) ion occured in the mean while; the fresh corrosion products dispersedin solution as colloidal dispersions, and CuCl transformed into Cu_2(OH)_3Cl throughCu_2O. The experimental phenomena were discussed. Tbe reaction order, reaction rate,and apparent activation energy of these reactions were calculated.

关 键 词：青铜 腐蚀 氯化亚铜 氧化反应 

分 类 号：TG178[金属学及工艺—金属表面处理]