Effect of protonation on anticorrosion properties of polyheteroatomic inhibitors of acid corrosion of steel

doi:10.32434/0321-4095-2020-130-3-101-107

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2021

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“…This change can significantly affect the redistribution of charges, the ability to adsorb or form complexes, the patterns of protective layers formation. Nevertheless, it has not been an object of a thorough research yet [11].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of formation of during inhibition of steel by sulfanilamide in solutions of hydrochloric acid with different pH

Kurmakova

Bondar

Holub

et al. 2021

Phys. Chem. Solid St.

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Experimentally proved by the method of polarization resistance formation of protective layers during inhibition steel corrosion by Sulfanilamide in aqueous solutions of hydrochloric acid with different pH. It is shown the difference due to the predominance of the protonated or unprotonated form of the molecule. It was found that at predominance of protonated forms of molecules (pH £2,4) formed dense protective films and predominance of unprotonated forms of molecules (pH ³2,4) are formed layers that do not inhibit diffusion processes. Sulfanilamide provides high and stable inhibition efficiency (<90%) in acid chloride solutions in case of formation protective layers consisting of protonated molecules what to consider when use it.

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Section: Introductionmentioning

confidence: 99%