New Insights on the Corrosion–Erosion Behavior of 904L Stainless Steel in Phosphoric Acid Containing Impurities

This research aims to provide a new interpretation of the corrosion–erosion behavior of 904L stainless steel in a phosphoric acid environment, containing impurities promoting corrosion (4 wt% H 2 SO 4 , 0.42 wt% KCl) and solid particles favoring the mechanical effects. Electrochemical and spectrosco...

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Bibliographic Details
Published in:Journal of bio- and tribo-corrosion 2024-03, Vol.10 (1), Article 13
Main Authors: Aftimi, S., Kerroum, Y., Guenbour, A., Bellaouchou, A., Idrissi, H., Boulif, R., Semlal, N., Warad, I., Zarrouk, A.
Format: Article
Language:English
Subjects:
Biomaterials
Chemistry and Materials Science
Corrosion
Corrosion and Coatings
Impurities
Materials Science
Phosphoric acid
Potassium chloride
Reaction kinetics
Solid Mechanics
Stainless steel
Stainless steels
Sulfuric acid
Surface analysis (chemical)
Synergistic effect
Tribology
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Summary:This research aims to provide a new interpretation of the corrosion–erosion behavior of 904L stainless steel in a phosphoric acid environment, containing impurities promoting corrosion (4 wt% H 2 SO 4 , 0.42 wt% KCl) and solid particles favoring the mechanical effects. Electrochemical and spectroscopic analyzes were performed in this investigation. The results showed that solid particle concentrations affect the passivity of stainless steel, which turns it into a less stable layer, proving an increase in corrosion kinetics and passive current density. During this process, the passive film formed under these corrosion–erosion conditions presents a strong diffusion of metallic vacancies and the difficulty of self-healing of the passive film, the results of gravimetric measurements at 24 g/L of solid particles showed that this is due to the synergistic effect which has about 50%, and the mechanical effects have about 46%, of which the surface analysis proved that the surface became heterogeneous and rough.
ISSN:2198-4220
2198-4239
DOI:10.1007/s40735-024-00818-4