Corrosion resistance of ZnNiP+Ni composite coatings | Zendy

Kubisztal J. | Zendy; Niedbała J. | Zendy; Budniok A. | Zendy

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Corrosion resistance of ZnNiP+Ni composite coatings

Author(s) -

Kubisztal J.,

Niedbała J.,

Budniok A.

Publication year - 2010

Publication title -

surface and interface analysis

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.52

H-Index - 90

eISSN - 1096-9918

pISSN - 0142-2421

DOI - 10.1002/sia.3310

Subject(s) - corrosion , materials science , dielectric spectroscopy , composite number , nickel , metallurgy , alloy , oxide , electrochemistry , layer (electronics) , chemical engineering , composite material , chemistry , electrode , engineering

ZnNiP+Ni composite coatings were prepared by embedding nickel particles into ZnNiP alloy using ammonia solution in which Ni powder was suspended by stirring. Such coatings have been deposited on a 0H18N9 stainless steel substrate under galvanostatic conditions ( j = −40 mA cm −2 ), and at a temperature of 293 K. In order to investigate corrosion properties of the as‐deposited and annealed (593 K for 2 h in argon atmosphere) ZnNiP+Ni composite coatings in 5% NaCl environment potentiodynamic technique and electrochemical impedance spectroscopy (EIS) were used. It was stated that thermal treatment strongly improved the corrosion parameters of the examined ZnNiP+Ni composite coatings, and also that better corrosion properties result from i) improved corrosion properties of the oxide layer; and ii) the presence of new γNi 5 Zn 21 phase in composite matrix. Copyright © 2010 John Wiley & Sons, Ltd.

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