Issue 12, 2015

Synergistic effects of passivation treatment and nano-electrodeposition technologies on corrosion protection performance of the electrogalvanized steel

Abstract

It is well known that surface nanocrystallization and passivation treatment are effective ways of improving corrosion resistance properties of the electrogalvanized steel, but their synergistic effects have rarely been studied. In this study, the effect of surface nanocrystallization on the chromium-free passivation film of electrodeposited zinc coating is investigated. Meanwhile, the formation mechanism of the chromium-free passivation film on electrodeposited zinc coating changing with the reduction of grain sizes from micro to nano-meters is analyzed and a model for the formation mechanism is proposed. The chromium-free passivation film of nanocrystalline zinc coating combines the advantages of passive films and nano-materials, and has better corrosion protection performance than the chromium-free passivation film of coarse-grained zinc coating and nanocrystalline zinc coating as well as a mirror decorative effect with light blue color. The corrosion resistance properties of coarse-grained zinc coating are heightened almost five times due to the synergistic effects of passivation treatment and nano-electrodeposition technologies.

Graphical abstract: Synergistic effects of passivation treatment and nano-electrodeposition technologies on corrosion protection performance of the electrogalvanized steel

Supplementary files

Article information

Article type
Paper
Submitted
24 Aug 2015
Accepted
15 Oct 2015
First published
19 Oct 2015

New J. Chem., 2015,39, 9903-9909

Author version available

Synergistic effects of passivation treatment and nano-electrodeposition technologies on corrosion protection performance of the electrogalvanized steel

Q. Li, W. Ge, J. Zhang, P. Yang and M. An, New J. Chem., 2015, 39, 9903 DOI: 10.1039/C5NJ02249E

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