Solubility in Quaternary Systems FeCl2-H3PO4-H2O and ZnCl2-H3PO4-H2O

Abstract

This paper looks at solubility in systems FeCl₂-H₃PO₄-H₂O and ZnCl₂-H₃PO₄-H₂O at temperatures 25, 60 and 80 ºC. Phase diagrams of these mutual quaternary systems are constructed and crystallization fields of ferrous and zinc mono-, di- or trisubstituted phosphates and chlorides are defined. The new scientific data obtained allows us to justify optimal parameters of processes that take place in such systems. In particular this pertains to preparation of monosubstituted iron and zinc phosphates used in production of anticorrosive phosphate protective coatings.