The aim of this research is creation of the composition of the converter of the rust modifier with improved physical-mechanical and technical indicators, with high adhesion and anticorrosion properties, with more stability of phosphate layers. The objective is solved with that in the composition of the coveter of rust modifier, including 22% aqueous solution of orthophosphoric acid, furfuryl alcohol and addition of amine group, differing with that in addition includes nitro lignin and as addition of amine group-hexamethylenetetramine.