Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 27    No. 9    September 2017

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Effect of cooling ways on properties of Al/Pb-0.2%Ag rolled alloy for zinc electrowinning
Xiang-yang ZHOU1, Shuai WANG1, Juan YANG1, Zhong-cheng GUO2,3, Jian YANG2, Chi-yuan MA1, Bu-ming CHEN2

1. School of Metallurgy and Environment, Central South University, Changsha 410083, China; 2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; 3. Kunming Hendera Science and Technology Co., Ltd., Kunming 650106, China

Abstract:In order to study the new anode materials for zinc electrowinning, Al/Pb-0.2%Ag rolled alloy was produced by composite casting and hot rolling. Then the effect of cooling ways on properties of Al/Pb-0.2%Ag rolled alloy was investigated. As the results of metallographic test indicated, with the increasing of cooling intensity, both Vickers hardness and yield strength of Al/Pb-0.2%Ag rolled alloy increase. Furthermore, the Al/Pb-0.2%Ag rolled alloy, cooled by ice salt, presents the finest grain size and shows the lowest oxygen evolution potential (1.5902 V), while that of alloy cooled by water and air are 1.6143 V and 1.6288 V, respectively. However, the corrosion current density and corrosion rate of the Al/Pb-0.2%Ag rolled alloy, cooled by ice salt, are the highest. This can be attributed to its largest specific surface area, which promotes the contact between the anode and electrolyte.

 

Key words: Al/Pb-0.2%Ag rolled alloy; cooling way; electrocatalytic activity; electrochemical property; corrosion resistance; zinc electrowinning

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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