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Portugaliae Electrochimica Acta
versión impresa ISSN 0872-1904
Port. Electrochim. Acta v.29 n.1 Coimbra 2011
Preparation and Physicochemical Characterization of Natural Phosphate and Kaolin Coatings in Stainless Steel
R. Najih,1 A. Chtaini2,* and H. Oulfajrite2
1 Laboratoire Valorisation et Sécurité des Produits Agro-Alimentaires, Faculté des Sciences et Techniques de Beni Mellal, Maroc
2 Equipe dElectrochimie Moléculaire et Matériaux Inorganiques, Faculté des Sciences et Techniques de Beni Mellal, Maroc
DOI: 10.4152/pea.201101039
Abstract
The inhibition efficiency of natural phosphate and kaolin systems in controlling corrosion of stainless steel in HClO4 (0.1 M) solution has been evaluated by electrochemical polarization methods, and electrochemical impedance spectroscopy. The electrochemical data show that the corrosion resistance is greatly enhanced after surface modification. The best protection is obtained with natural phosphate. The uniform coatings of phosphate and kaolin on iron substrates were obtained by electro deposition.
Keywords: electrodeposition; natural phosphate; kaolin; impedance; polarization; stainless steel.
Full text only available in PDF format.
Texto completo disponível apenas em PDF.
References
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* Corresponding author. E-mail address: chtainia@yahoo.fr
Received 7 September 2010; accepted 18 December 2010