Mass Transfer of Phosphorus-Containing Corrosion Inhibitors in Epoxy Protective CoatingsстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 28 февраля 2020 г.
Аннотация:Mass transfer of phosphorus-containing corrosion inhibitors in epoxy matrices, which form the
layers of anticorrosion primers and coatings, has been investigated. It has been shown that diffusion profiles
of phosphonic acid distribution are stepwise, which has been previously observed in a broad range of mineral
and organic acids. Penetration rate constants λ of phosphonic acids are comparable with the values that are
intrinsic for inorganic acids. The acid-to-water ratio in internal solution in polymer is higher than in outer
diffusant solution upon diffusion of phosphonic acids to amine-hardened epoxy matrices. A selective diffu-
sion of phosphate anions has been observed in the solutions of acidic monosubstituted phosphates.