Efecto de la fenformina sobre la corrosión electroquímica del hierro
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Títol
Efecto de la fenformina sobre la corrosión electroquímica del hierroData de publicació
1991Editor
Instituto Español de Corrosión y ProtecciónISSN
0210-6604Tipus de document
info:eu-repo/semantics/articleVersió
info:eu-repo/semantics/publishedVersionResum
Voltammetry provides quick information about the evolution of the iron electrodes subjected to different chemical treatments. Temporarily the dichromate protects it in acid medium whereas the protective action of the ... [+]
Voltammetry provides quick information about the evolution of the iron electrodes subjected to different chemical treatments. Temporarily the dichromate protects it in acid medium whereas the protective action of the diprotonated phenformine is more persistent and efective, as it is observed through Scanning Electronic Microscopy (SEM). Cr (VI) passivates iron in potassium chloride medium and phenformine complexes Fe (II) forming a surface film that protects it from corrosion. The chromate forms the surface film in basic medium. This film makes it impossible to detect by voltammetry the peaks of the Fe (II) + 2e ↔ Fe (O) system. The phenformine, in basic form, forms insoluble white complexes that settles on the electrode surface protecting it from electrochemical oxidation. [-]
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Revista iberoamericana de corrosión y protección, 1991, 22 (4-5-6)Drets d'accés
Copyright © Revista iberoamericana de corrosión y protección
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