A STUDY OF THE MECHANISM OF DEZINCIFICATION OF α+β BIPHASE BRASS

J Chin Soc Corr Pro

1983, Vol. 3

Issue (2): 59-67 DOI:

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A STUDY OF THE MECHANISM OF DEZINCIFICATION OF α+β BIPHASE BRASS

Can Fuxing Zou Jinyan and Yao Luan(The Electrochemistry Laboratory; Wuhan University)

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Abstract By means of electrochemical and trace amount analysis techniques the dezincification behavior of α+β biphase brass in a deaerated acidified solution of sodium chloride under condition of continuous introduction of Cu~+ into solution was studied. The changes of the indicator electrode potential with time could provide information of the copper deposition on the brass surface. Similar results were obtained by trace amount analysis method. Experimental results show that corrosion of biphase brass under experimental conditions follows the dissolution-redeposition mechanism. It was shown that the reduction of Cu~+ was compensated by the dissolution of Zinc from brass. Thus, serious dezincification took place on the surface of biphase brass. Experimental results indicated that the limiting concentration of Cu~+ which caused copper redeposition was below 10~(-4) M. Apparent rate constant of copper redeposition was 3.7×10~(-4) sec~(-1). A model was suggested and compared with experimental results.

Received: 25 April 1983

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Can Fuxing Zou Jinyan and Yao Luan(The Electrochemistry Laboratory; Wuhan University). A STUDY OF THE MECHANISM OF DEZINCIFICATION OF α+β BIPHASE BRASS. J Chin Soc Corr Pro, 1983, 3(2): 59-67.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1983/V3/I2/59

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