A METHOD OF SYNTHESIS OF AN ANTI-CORROSION ADDITIVE TO ORGANIC COATING COMPOSITIONS AND AN ORGANIC COATING COMPOSITION WITH AN ANTI-CORROSION ADDITIVE

摘要

A method of synthesis of an anti-corrosion additive to organic coating compositions, comprising preparing an aqueous reaction solution at a temperature lower than an ambient temperature. The aqueous reaction solution comprises: at least one acid selected from the group consisting of: phosphoric (V) acid, sulfuric (VI) acid, nitric (V) acid, hydrochloric acid, hydrofluoric acid, perchloric acid having a total concentration in aqueous solution from 0,1 to 8 M; at least one oxidant selected from the group consisting of: ammonium persulfate and hydrogen peroxide; aniline in the amount necessary to obtain the weight ratio of aniline:oxidant from 1:2,5 to 1:5; and an anion donor in the amount necessary to obtain the weight ratio of anion donor:aniline not less than 0,1:1. The method comprises, while preparing the aqueous reaction solution, introducing to the aqueous reaction solution: as the anion donor, a compound comprising anions selected from the group consisting of: hexacyanoferrates (III) [Fe(CN)₆^3-] and silicates (SiO₃^2-); at least one compound being iron (III) ion (Fe³⁺) donor in the amount necessary to obtain the concentration of iron ions (Fe³⁺) in the reaction mixture in a range from 0,05 to 0,15 M; next, stirring the reaction mixture until the precipitate is precipitated; filtering and drying the precipitate; to obtain a product of the reaction which is a hybrid PANI compound selected from the group consisting of: PANI hexacyanoferrate (III) and PANI silicate.