Хімічне розчинення берилієвої бронзи при розмірному травленні в різних електролітах

Abstract

The process of chemical ionization of Cu98Be alloy in solutions of various composition based on FeCl3 was investigated. On the base of our first investigations of determination of the ionization rate of Cu98Be alloy in various electrolytes, the solution of FeCl3 was chosen as a basic component of etching solution. The series of five composition of etching solutions which provide high etching rate and uniform dissolution of beryllium bronze components was selected. With the aim of determination of beryllium bronze chemical dissolution selectivity, the etching process in ferric chloride solutions during the long period of time was studied. As the quantitative indexes of Cu98Be alloy etching evenness the coefficients of alloy components dissolution selectivity were determined. While the full etching solutions exhausting the low-soluble compounds were formed. The mineralogical composition of low-soluble compounds in exhausted etching solutions was determined by X-rayphase analysis. The compounds of beryllium and copper (I) were absent in precipitate. The optimal compositions of etching solutions providing high-quality etching of beryllium bronze according to several criteria – high process speed, uniform dissolution of alloy components, high capacity for both components of beryllium bronze were proposed. The obtained results are of great importance in practical use because they allow selecting the composition of the etching solution, which in turn helps to optimize the technological etching process.