Biomass Conversion Products as Steel Corrosion Inhibitors |
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Authors: | Mishurov V I Shubina E N Klushin V A Chizhikova A A Kashparova V P Berezhnaya A G |
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Institution: | 1.Don State Technical University, Rostov-on-Don, 344002, Russia ;2.Platov South-Russian State Polytechnic University (NPI), Novocherkassk, Rostov-on-Don oblast, 346428, Russia ;3.Southern Federal University, Rostov-on-Don, 344006, Russia ; |
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Abstract: | 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. |
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