The Formation Process of Black Trivalent Chromium Conversion Coating on Zn Electrodeposit

Hai Ping Liu; Si Fu Bi; Xiang Guo Teng; Yuan Chun Yu

doi:10.4028/www.scientific.net/AMR.503-504.676

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 503-504The Formation Process of Black Trivalent Chromium...

The Formation Process of Black Trivalent Chromium Conversion Coating on Zn Electrodeposit

Abstract:

A black trivalent chromium conversion coating (CCC) was obtained on Zn deposit in chromium trichloride solution at 55 °C. The formation process of trivalent CCC on Zn deposit were thoroughly investigated by using X-ray fluorescence spectrometer and X-ray photoelectron spectroscopy in combination with atomic force microscopy surface analysis. The trivalent CCC on Zn deposit is consisted of Zn, Cr, O, Ni, Co, P and N elements, with visible micro-cracks on the film’s surface. The growth rate, the surface color and the morphology of this conversion coating vary with the dipping time.

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Periodical:

Advanced Materials Research (Volumes 503-504)

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676-679

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.503-504.676

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Online since:

April 2012

Authors:

Hai Ping Liu, Si Fu Bi, Xiang Guo Teng, Yuan Chun Yu

Keywords:

Conversion Coating, Trivalent Chromium, Zn Deposit

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