The effects of temperature and pH on the dissolution and passivation processes of copper in carbonate-bicarbonate solutions

Journal of the Brazilian Chemical Society

Folquer, M.E.¹  Ribotta, S.B.¹ 

关键词: copper;    pH;    temperature;    voltammetry;   

DOI  :  10.1590/S0103-50531997000200013

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

Electrochemical studies of polycrystalline copper electrodes in carbonate-bicarbonate solutions analyzing both temperature and pH effects were carried out, covering a wide range of electrolyte composition in the 5-65 °C range. Hydrodynamic conditions were also considered. The results are explained on the basis of a modification of the characteristics of the film through solution stirring and high temperature. In this situation, a less hydrated passive layer is obtained, reducing the dissolution process. The ionic strength becomes an additional factor that affects the general state of the system.

【 授权许可】

Unknown