SELECTION OF CONDITIONS FOR THE APPLICATION OF COATINGS BY THE DIFFUSIOPHORESIS TECHNIQUE

The main stages involved in the formation of coatings by diffusiophore sis are considered and the principles of designing optimum composition s for the application of this method are determined. The function of e ach component of the composition is discussed and the interrelation be tween the components is substantiated. New compositions, in which hydr ofluoric acid (undesirable for ecological reasons) is replaced by orth o-phosphoric and some other acids, are developed. It is demonstrated t hat the main process that accounts for the growth of the deposit is th e diffusiophoretic drift of polymer particles toward the surface of me tal, which leads to concentration of the particles near the surface, f ollowed by their coagulation.