The wet corrosion of molybdenum thin film -. Part I: Behavior at 25°C

The corrosion and passivation behaviour of molybdenum thin films obtained by Physical Vapor Deposition (PVD) was investigated in aerated chloride and sulfate solutions at different pH values. Open circuit potential (ocp) measurements, polarisation experiments and electrochemical impedance spectrosco...

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Bibliographic Details
Published in:Materials and corrosion 2004-08, Vol.55 (8), p.602-609
Main Authors: De Rosa, L., Tomachuk, C. R., Springer, J., Mitton, D. B., Saiello, S., Bellucci, F.
Format: Article
Language:English
Subjects:
Applied sciences
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Corrosion
Corrosion environments
Corrosion mechanisms
EIS
Exact sciences and technology
Metals. Metallurgy
molybdenum thin-films
photovoltaic modules
polarisation curves
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Summary:The corrosion and passivation behaviour of molybdenum thin films obtained by Physical Vapor Deposition (PVD) was investigated in aerated chloride and sulfate solutions at different pH values. Open circuit potential (ocp) measurements, polarisation experiments and electrochemical impedance spectroscopy (EIS) were employed. The experimental results suggest that the metal surface is covered by a passive film; however, corrosion still occurs. For the samples assessed during the current research, the acidic electrolytes tended to be less corrosive; however, a limited passive region was associated with the most basic sulfate or chloride solution. The effect of the pH was found to be more pronounced than the effect of the ion (chloride or sulfate).
ISSN:0947-5117
1521-4176
DOI:10.1002/maco.200303785