Abstract
We study the properties of the quaternary salts of pyridinium, imidazopyridinium and imidazoazepinium as inhibitors of the corrosion of St3ps steel caused by sulfate-reducing bacteria of the Desulfovibrio genus. These bacteria can be regarded as the main component of the corrosive natural communities of soil. It is shown that the role of criterion of the efficiency of quaternary salts in the case of biocorrosion of low-carbon steels can be played by their reaction ability characterized by the electric charges on adsorption-reactive centers, dipole moment, and energy gap. A good correlation dependence of the degree of protection on the energy gap is discovered.
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