Localized Corrosion Mechanism of Q125 Casing Steel in Residual Acid Solution during Oil Reservoir Acidizing
نویسندگان
چکیده
This paper aims to investigate the localized corrosion mechanism of Q125 casing steel in residual acid solution with Mannich base type inhibitors during oil reservoir acidizing process. The behavior fresh (20% HCl) and (pH 1.0 pH 3.0 without 3-(4-chlorophenylimino)-1-(piperidine-1-ylmethyl) indolin-2-one (Mannich type, Mb) inhibitor was studied by electrochemical test, weight loss, surface analysis. morphology composition products were analyzed SEM/EDS XPS; local rate or obtained 3D profilometry. It determined that had higher inhibition efficiency conditions than conditions. Under condition acid, decrease molecular coverage on substrate promotes occurrence corrosion. Pitting detected containing inhibitor, which may be related fact FeCO3 hinders adsorption molecules surface.
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ژورنال
عنوان ژورنال: Coatings
سال: 2023
ISSN: ['2079-6412']
DOI: https://doi.org/10.3390/coatings13040710