We show the possibility of application of environmentally friendly substances, such as xanthan gum, urotropin, extract of oak chips, and technical glycerol, as corrosion inhibitors for 20 steel, copper, brass, and aluminum in 5% solutions of hydrochloric and citric acids. On the basis of the extract of oak chips, technical glycerol, and urotropin, we create a composition with pronounced synergistic effect that makes the corrosion rate of 20 steel 12 times lower at a concentration of 2 g/liter. The proposed composition is also quite efficient for copper, brass, and aluminum not only in 5% HCl but also in 5% citric acid. The mechanism of protective action of the composition is adsorptive with inhibition of both electrode reactions.
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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 56, No. 5, pp. 28–32, September–October, 2020.
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Slobodian, Z.V., Mahlatiuk, L.А., Kupovych, R.B. et al. Corrosion Behavior of 20 Steel, Copper, Brass, and Aluminum in Inhibited Acid Solutions. Mater Sci 56, 608–612 (2021). https://doi.org/10.1007/s11003-021-00471-z
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DOI: https://doi.org/10.1007/s11003-021-00471-z