Corrosion resistance of Ni/Zn-Fe/Zn and Ni/Zn/Zn-Fe compositionally modulated multilayer coatings

Authors: M. Rahsepar, M. E. Bahrololoom

Source: Corrosion Engineering, Science and Technology

Publisher: Maney Publishing

Abstract:

Compositionally modulated multilayer coatings of Ni/Zn, Ni/Zn-Fe/Zn and Ni/Zn/Zn-Fe, for corrosion protection performance, were deposited on steel substrates using a dual bath technique. The coating protection performance was evaluated using Tafel extrapolation, anodic polarisation and salt fog corrosion tests. The performance of Ni/Zn-Fe/Zn and Ni/Zn/Zn-Fe multilayers was found to be better than that of Ni/Zn multilayer. Considering the corrosion mechanism, this can be attributed to an improvement in the corrosion resistance of the sacrificial layers by substitution of zinc within the Zn/Zn-Fe or Zn-Fe/Zn layers.

Document Type:

DOI: 10.1179/10.1179/147842208X388771

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