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Phosphate ions used as green inhibitor against copper corrosion in tap water
Three dosages of PO4(3-) ions are evaluated as corrosion inhibitors of copper in artificial tap water by measuring the corrosion potential, polarization resistance, electrochemical impedance and reflectance spectra. The water is moderately hard, highly carbonated and chloride-rich. The results show that the surface film is composed by Cu2O. When the inhibiting agent is added, the film becomes thicker, denser and more compact. This behaviour is attributed to CuO incorporating into the passive layer. The optimal dosage of inhibitor is 10 mg l-1 P when the polarization resistance increases three times. The inhibitor retards the pit initiation, without hindering pit growth.
Phosphate ions used as green inhibitor against copper corrosion in tap water
Three dosages of PO4(3-) ions are evaluated as corrosion inhibitors of copper in artificial tap water by measuring the corrosion potential, polarization resistance, electrochemical impedance and reflectance spectra. The water is moderately hard, highly carbonated and chloride-rich. The results show that the surface film is composed by Cu2O. When the inhibiting agent is added, the film becomes thicker, denser and more compact. This behaviour is attributed to CuO incorporating into the passive layer. The optimal dosage of inhibitor is 10 mg l-1 P when the polarization resistance increases three times. The inhibitor retards the pit initiation, without hindering pit growth.
Phosphate ions used as green inhibitor against copper corrosion in tap water
Phosphationen als umweltfreundlicher Inhibitor bei der Kupferkorrosion in Trinkwasser
Valcarce, M.B. (author) / Vazquez, M. (author)
Corrosion Science ; 52 ; 1413-1420
2010
8 Seiten, 10 Bilder, 4 Tabellen, 42 Quellen
Article (Journal)
English
Phosphate ions used as green inhibitor against copper corrosion in tap water
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