Study of corrosion rate and deposit accumulation under circulating water concentration in industrial applications

Abstract

*Кафедра технологии воды и топлива **Кафедра технологии неорганических веществ и экологии Одесский национальный политехнический университет пр. Шевченко, 1, г. Одесса, Украина, 65044

The study of inhibiting structural material corrosion in water recycling systems by sodium hydroxide

“…3) heat transfer surfaces are made of various metals and the temperature gradient is not uniform in different cycle locations [4]; 4) the corrosion process is associated with the phenomena of thermal stability and biogeneity [10,11].…”

“…Carbonate deposits and the action of microorganisms often cause ineffectiveness of the methods used in corrosion protection of circulating water supply systems [10]. Deposits of calcium and magnesium carbonates protect metal from corrosion but their thick layers on the metal surface worsen heat transfer [4].…”

“…In the course of water use at plants, its mineralization often grows causing an increase in its corrosivity [3,4]. Therefore, circulating water is periodically discharged to sewage systems or partially replaced with fresh water.…”

“…For rapid and complete reaction, methanol and alkaline catalyst are used in the process of transesterification [4][5][6]. After the transesterification reaction, separation of a glycerol phase and a phase containing fatty acid methyl esters occurs.…”