| Autor: |
Khadidja Belassadi, Abd Raouf Boulebtina, Malika Diafi, Nadjette Belhamra, Abdelouahed Chala |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Diffusion Foundations. 18:19-26 |
| ISSN: |
2296-3642 |
| DOI: |
10.4028/www.scientific.net/df.18.19 |
| Popis: |
The purpose of this paper was to investigate the effect of Al2O3 and TiO2 nanoparticles contents on structural proporties, microhardness and corrosion resistance of Zn-Ni alloy coationg. Zn-Ni, Zn-Ni-Al2O3 and Zn-Ni-TiO2 composite coatings were electrodeposited on steel substrate by direct current in sulphate bath.The structure of the coatings was studied by X-ray diffration and by scaning electron miroscopy. The results showed the appearance of Ni5Zn21 phases and that the incrorporation of Al2O3 and TiO2 in the Zn-Ni coating refined the crystal grain size.The corrosion performance of coating in the 0.6M NaCl as a corrisive solution was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy EIS methods. It was found that the incorporation of nanoparticules in Zn-Ni alloy coating have better corrosion resistance and the values of Rct and Zw increase, while the values of Cdl decrease with increasing of nanoparticules. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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