Determination of diffusion factors according to the distribution of coating components at isothermal hold-up

Calculation equations for estimate of coating metal diffusion coefficients are derived. The experimental checking of derived dependences is carried out. Studies have been made on flat samples of 2x10x15 mm dimensions made of armco iron with W,Mo,Cr, Ga, Ge coatings. The initial distribution of saturation elements determined experimentally, and approximated by functions, is presented. By the method of placing of values of initial distributions into the calculated dependences determined are the coefficients of diffusion for above elements in armco iron. For experimental ckecking of the problem made is a program of computer calculation for two-phase chromium coating on armco iron. Cr diffusion coefficients in α- and γ-phase are determined at 950 deg, which constitute 5.692x10-10 cm2/s and 1.365x10-10 cm2/s. respectively. The control tests have shown that the application of calculated diffusion coefficients permits to describe with high accuracy the redistribution of saturation element in matrix of the saturating metal