Efecto de la fenformina sobre la corrosión electroquímica del hierro
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comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
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Title
Efecto de la fenformina sobre la corrosión electroquímica del hierroDate
1991Publisher
Instituto Español de Corrosión y ProtecciónISSN
0210-6604Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionAbstract
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)Rights
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- QFA_Articles [825]