Temperature Effect on the Corrosion Behaviour of Alloy 31 in polluted H3PO4 and Analysis of the Corrosion Products by Laser Raman Microscope

Electrochemical behaviour of Alloy 31, a highly alloyed austenitic stainless steel (UNS N08031), in a 40 wt.% H3PO4 solution polluted with 2 wt.% H2SO4, 0.06 wt.% KCl and 0.6 wt.% HF was evaluated by cyclic potentiodinamic curves at different temperatures (20, 40, 60 and 80 °C). Temperature was foun...

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Bibliographic Details
Published inInternational journal of electrochemical science Vol. 7; no. 7; pp. 5754 - 5764
Main Authors Escrivà-Cerdán, C., Blasco-Tamarit, E., García-García, D.M., García-Antón, J., Ben-Bachir, A.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2012
Subjects
Laser Raman microscope
Phosphoric acid
Stainless steel
Temperature
Phosphoric acid
Temperature
Laser Raman microscope
Stainless steel
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Summary:Electrochemical behaviour of Alloy 31, a highly alloyed austenitic stainless steel (UNS N08031), in a 40 wt.% H3PO4 solution polluted with 2 wt.% H2SO4, 0.06 wt.% KCl and 0.6 wt.% HF was evaluated by cyclic potentiodinamic curves at different temperatures (20, 40, 60 and 80 °C). Temperature was found to favour both cathodic and anodic reactions. The corrosion products forming on the surface of Alloy 31 were indentified in situ by Laser Raman microscope. Corrosion products were mainly iron and chromium oxides, although phosphates were also included as a corrosion product on the surface of Alloy 31.
ISSN:1452-3981
1452-3981
DOI:10.1016/S1452-3981(23)19440-5