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Evolution of the dicalcium phosphate-dihydrate (DCPD) coating created by large amplitude sinusoidal voltammetry (LASV) on corrosion resistance of the ZW3 magnesium alloy in chloride containing environment Cover

Evolution of the dicalcium phosphate-dihydrate (DCPD) coating created by large amplitude sinusoidal voltammetry (LASV) on corrosion resistance of the ZW3 magnesium alloy in chloride containing environment

Open Access
|Feb 2018

Abstract

The contribution is focused on the preparation of coating based on the dicalcium phosphate-dihydrate (DCPD) on the surface of ZW3 magnesium alloy. For the preparation of the coating a cathodic electrodeposition technique called Large Amplitude Sinusoidal Voltammetry (LASV) was used. The DCPD layer was prepared at the temperature of 22 ± 2 °C in electrolyte composed of 0.1M Ca(NO3).4H2O, 0.06 M NH4H2PO4 and H2O2. Electrochemical characteristics were evaluated by electrochemical impedance spectroscopy (EIS) in 0.1M NaCl solution. The obtained data in form of Nyquist plots were analysed by the equivalent circuit method. It is clear from the measured values of polarization resistance Rp that dicalcium phosphate-dihydrate (DCPD) layer prepared by LASV electro-deposition technique improved corrosion resistance of ZW3 alloy in the chosen environment.

DOI: https://doi.org/10.2478/kom-2018-0003 | Journal eISSN: 1804-1213 | Journal ISSN: 0452-599X
Language: English
Page range: 14 - 18
Published on: Feb 16, 2018
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2018 D. Kajánek, B. Hadzima, F. Pastorek, M. Neslušan Jacková, published by Association of Czech and Slovak Corrosion Engineers
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.