MECHANISM OF CORROSION RESISTANCE OF Zn—Ni ALLOY PLATING

J Chin Soc Corr Pro

1989, Vol. 9

Issue (2): 87-94 DOI:

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MECHANISM OF CORROSION RESISTANCE OF Zn—Ni ALLOY PLATING

An Maozhong Tu Zhenmi Zhang Jingshuang and Yang Zhelong (Harbin Institvte of Technology)

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Abstract The corrosion mechanism of Zn-Ni alloy coating has been investigated. The composition, distribution and chemical states of the alloy coating and corrosion products have been measured by means of X-ray diffraction, Auger Electro Spectroscopy, X-ray photoelectron spectroscopy and Ion Microanalysis. The Zn-Ni alloy plating containing about 13％(wt) Ni has the best corrosion resistance in salt spray test. The structure of the alloy with about 13％ Ni is γ phase and has the composition of NiZn_3 or Ni_5Zn_(21).The main corrosion product of 13％ Ni alloy deposit is ZnCl_2·4Zn(OH)_2 which can restrain the corrosion process.

Received: 25 April 1989

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An Maozhong Tu Zhenmi Zhang Jingshuang and Yang Zhelong (Harbin Institvte of Technology). MECHANISM OF CORROSION RESISTANCE OF Zn—Ni ALLOY PLATING. J Chin Soc Corr Pro, 1989, 9(2): 87-94.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1989/V9/I2/87

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