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Effect of abrasive particles on electrochemical behaviour of passive film formed on Alloy 59 in contaminated phosphoric acid

Abstract : The effect of abrasive on electrochemical behaviour of passive film formed on a austenitic stainless steel alloy 59 (UNS N-06059) in polluted phosphoric acid without and with abrasive grit was investigated by potentiodynamic and potentiostatic electrochemical measurements, electrochemical impedance spectroscopy and Mott-Schottky analysis. The results indicated that this alloy exhibited well passive behaviour with and without abrasive. In polluted phosphoric acid, the abrasion causes an electrochemical process acceleration leading to a decrease in the resistance and an increase in the capacity of material. The film formed on steel surface was of p-type and n-type semiconductors in the potential range below and above the flat band potential, respectively. The alloy 59 shows good resistance in the abrasion-corrosion according to his high chromium content, 22.65% Cr provided by the inner oxide film, while the outer film was more defective. © 2017, University of Mohammed Premier Oujda Morocco.
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https://hal.archives-ouvertes.fr/hal-01804242
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Submitted on : Thursday, May 31, 2018 - 3:12:49 PM
Last modification on : Wednesday, July 8, 2020 - 12:42:42 PM

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  • HAL Id : hal-01804242, version 1

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S. Skal, Y. Kerroum, A. Guenbour, A. Bellaouchou, H. Tabyaoui, et al.. Effect of abrasive particles on electrochemical behaviour of passive film formed on Alloy 59 in contaminated phosphoric acid. Journal of Materials and Environmental Science , Mohammed Premier University, 2017, 8 (9), pp.3234-3246. ⟨hal-01804242⟩

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