Corrosion protection of stainless steel by separate polypyrrole electrode in acid solutions / J. Hu in Materials and corrosion, Vol. 62 N° 1 (Janvier 2011)  

Public ISBD [article]  inMaterials and corrosion > Vol. 62 N° 1 (Janvier 2011) . - pp. 68–73 Titre : Corrosion protection of stainless steel by separate polypyrrole electrode in acid solutions Type de document : texte imprimé Auteurs : J. Hu, Auteur ; H. Zhu, Auteur ; Y. Ma, Auteur Année de publication : 2011 Article en page(s) : pp. 68–73 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : 410-stainless steel Acid solution corrosion Galvanic anodic protection Polypyrrole Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Galvanic anodic protection (GAP) of stainless steels by doped polypyrrole (PPy) was investigated using chemically synthesized PPy. Separate PPy powder-pressed electrodes with different surface areas were prepared. Electrochemical properties of PPy electrodes were studied by open circuit potentials (OCPs) and potentiostatic polarization. PPy powder-pressed electrodes were coupled with 410-stainless steel electrodes in different concentrations of sulfuric acid solutions, 5 M phosphoric acid solution, and industrial phosphoric acid solution (5 M phosphoric acid + 0.05% chloride ion). Remarkable shift of OCP to the positive direction and sharp decrease of corrosion rate were observed during the coupling experiments, which implies that 410-stainless steel was transferred to passive state. Results also showed that PPy electrode with sufficient surface area can provide corrosion protection to 410-stainless steel electrode in highly corrosive acid solution. Based on the experiment results, GAP provided by PPy and PANi (synthesized under similar conditions) was compared. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905344/abstract [article] Corrosion protection of stainless steel by separate polypyrrole electrode in acid solutions [texte imprimé] / J. Hu, Auteur ; H. Zhu, Auteur ; Y. Ma, Auteur . - 2011 . - pp. 68–73. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 1 (Janvier 2011) . - pp. 68–73 Mots-clés : 410-stainless steel Acid solution corrosion Galvanic anodic protection Polypyrrole Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Galvanic anodic protection (GAP) of stainless steels by doped polypyrrole (PPy) was investigated using chemically synthesized PPy. Separate PPy powder-pressed electrodes with different surface areas were prepared. Electrochemical properties of PPy electrodes were studied by open circuit potentials (OCPs) and potentiostatic polarization. PPy powder-pressed electrodes were coupled with 410-stainless steel electrodes in different concentrations of sulfuric acid solutions, 5 M phosphoric acid solution, and industrial phosphoric acid solution (5 M phosphoric acid + 0.05% chloride ion). Remarkable shift of OCP to the positive direction and sharp decrease of corrosion rate were observed during the coupling experiments, which implies that 410-stainless steel was transferred to passive state. Results also showed that PPy electrode with sufficient surface area can provide corrosion protection to 410-stainless steel electrode in highly corrosive acid solution. Based on the experiment results, GAP provided by PPy and PANi (synthesized under similar conditions) was compared. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.200905344/abstract

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