Study of steels used for production of equipment working in an aggressive medium
The paper considers the analysis of: corrosion hazard of the process; the technological process of separation of desliming; technological process of separation of vacuum crystallization plants, centrifugation and drying. The results of the study of the technical condition of the equipment of the dissolution department, as well as the results of the examination of the equipment for the department of desliming are presented. The probable causes of damage to the metal of the shells are described and explained. Illustratively the work shows: the signs of contact corrosion of the solvent B351-2 of the blade; corrosive damage to the weld metal of the elevator bucket chain; contact corrosion of the elevator bucket slats; corrosion damage to the axis with a metallization coating; ladle metal microstructure, heat-treated austenitic steel type 316Ti; the structure of austenitic-ferritic steel of elevator bucket; the microstructure of the metal case of “old” solvent B352; metal sample of solvent B352 with evidences of point and pitting corrosion; microstructure of austenitic-ferritic steel with indication of the localization of the points of study of the chemical composition of steel on the surface of the sample.