Avaliação do efeito da concentração de carbonato na eletrodeposição de cobre sobre discos de aço-carbono

Química Nova

Angélica Inês Ferreira Da Silva²  Júlio Carlos Afonso²  Luis Gonzaga Santos Sobral¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Química Departamento de Química AnalíticaRio de Janeiro RJ ,Brasil

关键词: copper plating;    carbonate;    blanket;   

DOI  :  10.1590/S0100-40422008000700041

来源: SciELO

【 摘 要 】

Mild steel blankets were covered with electrolytic copper thin layer, from cyanide bath, being evaluated the influence of the carbonate concentration in the physiochemical properties of those deposits. The cell voltage decreased as the current intensity decreased, but the adherence of the deposit was not enhanced, showing that the increment of carbonate concentration causes substantial problems. Chemical solubilization reactions of air-bearing carbon dioxide and oxidation of free cyanide ions through dissolved oxygen evolved in the anodic processes contribute to the copper plating to occur in an inefficient way. The best optimal conditions require a carbonate concentration below 50 g L-1.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License