TY - JOUR
T1 - Fundamental studies of copper anode passivation during electrorefining
T2 - Part III. The effect of thiourea
AU - Hiskey, J. Brent
AU - Cheng, Xuan
N1 - Funding Information:
The financial support of the Copper Research Center, University of Arizona, under the United States Defense Logistic Agency National Stockpile Center, Grant No. DN-004, is gratefully acknowledged. The authors also wish to thank the BHP Copper Company (formerly Magma Copper Company) for partial financial support.
PY - 1998
Y1 - 1998
N2 - Thiourea has been extensively used as a grain refiner in industrial copper electrorefining processes. The influence of thiourea on deposit structure and morphology has received considerable study; however, the effect of thiourea and its degradation chemistry on the passivation behavior of commercial copper anodes is still not fully understood. This study was conducted to provide useful information regarding the electrochemical response of a commercial copper anode in the absence and presence of thiourea. Chronopotentiometry measurements were performed in synthetic electrolytes containing different thiourea concentrations and in industrial electrolytes obtained directly from a commercial tank house. Passivation time (tp) and periodic passivation phenomena were found to be closely associated with thiourea concentration and degradation.
AB - Thiourea has been extensively used as a grain refiner in industrial copper electrorefining processes. The influence of thiourea on deposit structure and morphology has received considerable study; however, the effect of thiourea and its degradation chemistry on the passivation behavior of commercial copper anodes is still not fully understood. This study was conducted to provide useful information regarding the electrochemical response of a commercial copper anode in the absence and presence of thiourea. Chronopotentiometry measurements were performed in synthetic electrolytes containing different thiourea concentrations and in industrial electrolytes obtained directly from a commercial tank house. Passivation time (tp) and periodic passivation phenomena were found to be closely associated with thiourea concentration and degradation.
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U2 - 10.1007/s11663-998-0006-1
DO - 10.1007/s11663-998-0006-1
M3 - Article
AN - SCOPUS:0031988629
SN - 1073-5615
VL - 29
SP - 53
EP - 58
JO - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
JF - Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
IS - 1
ER -