Recuperation of etching solutions with obtaining pigments on the basis of ferrum oxide

Abstract

The problem of the utilization of etching solutions was investigated. The effect of different cations on colour characteristics of the pigments obtained from used etching solutions was studied. We studied the system Fe — Al — Cu. The areas of the formation of red, white, yellow and brown pigments are determined. The simplex latticed planning was used in order to make diagrams of composition and properties. Using the X-ray analysis, the phase composition of compounds that determine colour characteristics of pigments was found. The influence of heat treatment on colour characteristics of pigments was established.)