EFFECT OF NICKEL IN ZINC ELECTROWINNING UNDER PERIODICAL REVERSE CURRENT

被引：6

作者：

MASSE, N ^{[1
]}

PIRON, DL ^{[1
]}

机构：

[1] ECOLE POLYTECH,DEPT GENIE MET,MONTREAL H3C 3A7,QUEBEC,CANADA

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 1990年 / 20卷 / 04期

关键词：

D O I：

10.1007/BF01008874

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The effects of nickel impurities were investigated during the electrowinning of zinc in acidic media using periodical reverse current (PRC) along with anodic potential current response and cathodic current efficiency. The chemical and structural characteristics of the cathode deposit were also determined using nickel concentrations of 3, 5 and 10 mg l-1 in sulphuric acid (200 gl-1 H2SO4) containing 60 gl-1 of zinc. The cathodic current efficiency drop caused by nickel was less detrimental in PRC than DC. It was found that the morphology of the deposit plays an important role in the redissolution process caused by impurities. The levelling effect caused by PRC decreases the rate of zinc redissolution, which results in an increase of current efficiency. However for concentrations equal to or greater than 10 mgl-1, the levelling effect caused by PRC is no longer dominant. On the anode nickel did not affect the overpotential of the lead-silver electrode in PRC or DC modes. © 1990 Chapman and Hall Ltd.

引用

页码：630 / 634

页数：5

共 17 条

[1]

BERUBE LP, 1983, CAN METALL QUART, V22, P447

[2] ZINC ELECTROWINNING UNDER PERIODICAL REVERSE CURRENT (PRC) - BEHAVIOR OF THE ANODE AND ENERGY-CONSUMPTION [J].

BERUBE, LP ;

PIRON, DL .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1987, 134 (03) :562-570

[3]

BOCKRIS JOM, 1973, MODERN ELECTROCHEMIS, V2, P1218

[4]

BRATT GC, 1977, 1977 TASM C

[5]

CLASSENS PL, 1976, 105TH AIME ANN M LAS

[6]

ENCHEV ID, 1980, ZINC ELECTROWINNING

[7]

FARMER RH, 1968, DEC P EXTR MET DIV S, P242

[8] EFFECT OF NICKEL IMPURITIES ON ZINC ELECTRODEPOSITION [J].

FRATESI, R ;

ROVENTI, G ;

MAJA, M ;

PENAZZI, N .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1980, 10 (06) :765-774

[9]

JEPHSON AC, 1966, J MET, V8, P947

[10]

JERNSTEDT GW, 1947, MET FINISH, V45, P68

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