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Photocathodic protection properties of NiP/TiO2 bilayer coatings by a combined electroless plating and sol–gel method / M.-J. Zhou in Materials and corrosion, Vol. 63 N° 8 (Août 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 703–706 Titre : Photocathodic protection properties of NiP/TiO2 bilayer coatings by a combined electroless plating and sol–gel method Type de document : texte imprimé Auteurs : M.-J. Zhou, Auteur ; N. Zhang, Auteur ; Zhang, L., Auteur Année de publication : 2013 Article en page(s) : pp. 703–706 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Electroless  plating;  low  carbon  steel;  NiP/TiO2  bilayer  coating;  photocathodic  protection;  sol–gel Résumé : A combined electroless plating and sol–gel method was developed for preparing a NiP/TiO2 bilayer coating to achieve an especial photocathodic protection effect for A3 low carbon steel. Photocathodic protection properties of the coating were investigated by the electrochemical method. Surface morphology and structure of the coating were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that the open circuit potential (OCP) of the NiP/TiO2 coating electrode shifts to −0.42 V under UV irradiation, which is lower than the corrosion potential of A3 low carbon steel. When the light is turned off, the photocathodic protection effect cannot be maintained. In addition, the mechanism of photocathodic protection for the coating was also explored. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106060/abstract [article] Photocathodic protection properties of NiP/TiO2 bilayer coatings by a combined electroless plating and sol–gel method [texte imprimé] / M.-J. Zhou, Auteur ; N. Zhang, Auteur ; Zhang, L., Auteur . - 2013 . - pp. 703–706. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 8 (Août 2012) . - pp. 703–706 Mots-clés : Electroless  plating;  low  carbon  steel;  NiP/TiO2  bilayer  coating;  photocathodic  protection;  sol–gel Résumé : A combined electroless plating and sol–gel method was developed for preparing a NiP/TiO2 bilayer coating to achieve an especial photocathodic protection effect for A3 low carbon steel. Photocathodic protection properties of the coating were investigated by the electrochemical method. Surface morphology and structure of the coating were characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that the open circuit potential (OCP) of the NiP/TiO2 coating electrode shifts to −0.42 V under UV irradiation, which is lower than the corrosion potential of A3 low carbon steel. When the light is turned off, the photocathodic protection effect cannot be maintained. In addition, the mechanism of photocathodic protection for the coating was also explored. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201106060/abstract