Biomass Conversion Products as Steel Corrosion Inhibitors.

Autor: Mishurov, V. I., Shubina, E. N., Klushin, V. A., Chizhikova, A. A., Kashparova, V. P., Berezhnaya, A. G.
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Zdroj: Russian Journal of Applied Chemistry; May2019, Vol. 92 Issue 5, p620-624, 5p
Abstrakt: By-products formed in the conversion of vegetable biomass (multicomponent tar) were studied in comparison with the target products of the process (5-hydroxymethylfurfural, 2,5-diformylfuran) as inhibitors of corrosion of low-carbon steel in sulfuric acid at temperatures of 25-90°C. The gravimetric method was used to determine the inhibiting effect of additives. All these additives exhibit medium protective effects in an acid medium, with the degree of protection in 1 M sulfuric acid at room temperature exceeding 80%. The potentiody-namic polarization method was used to determine the influence exerted by the additives on partial reactions of the corrosion process. It was shown that the tar and 2,5-diformylfuran behave as additives of the cathodic type, and 5-hydroxymethylfurfural, as that of a mixed type. Temperature-kinetic calculations were used to determine the mechanism of action of the inhibitors. The corrosion process occurs in the presence of additives predominantly under the kinetic control. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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