Corrosion behaviour of a highly alloyed austenitic alloy UB6 in contaminated phosphoric acid

6533b853fe1ef96bd12acb6f

RESEARCH PRODUCT

Corrosion behaviour of a highly alloyed austenitic alloy UB6 in contaminated phosphoric acid

M. Boudalia A. Bellaouchou Abdellah Guenbour José García-antón R.m. Fernández-domene

subject

Materials science Article Subject Alloy Iron oxide engineering.material Electrochemistry INGENIERIA QUIMICA Corrosion chemistry.chemical_compound lcsh:TA401-492 General Materials Science Corrosion behaviour P type semiconductor Phosphoric acid Interfacial impedance Potentiodynamic curves Austenite business.industry Process Chemistry and Technology Metallurgy Semi-conducting property Dielectric spectroscopy Electroquímica Electrochemical behaviour Semiconductor Semiconductors chemistry engineering Mott-Schottky analysis lcsh:Materials of engineering and construction. Mechanics of materials business Flat band potential

description

The influence of temperature (20–80°C) on the electrochemical behaviour of passive films anodically formed on UB6 stainless steel in phosphoric acid solution (5.5 M H3PO4) has been examined by using potentiodynamic curves, electrochemical impedance spectroscopy, and Mott-Schottky analysis. UB6 stainless steel in contaminated phosphoric acid is characterised by high interfacial impedance, thereby, illustrating its high corrosion resistance. The obtained results show that the films behave as n-type and p-type semiconductors in the potential range above and below the flat band potential, respectively. This behaviour is assumed to be the consequence of the semiconducting properties of the iron oxide and chromium oxide regions which compose the passive film.

year	journal	country	edition	language
2013-01-01

10.1155/2013/363826 https://hdl.handle.net/10251/87500

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