Study on the Thermal Fatigue Effect of Carboxymethylcellulose Solution Media Dissolved in Water as a Quenching Cooling Medium

The degradation of a quenching cooling medium is a particularly important technical aspect in the technology of primary and final thermal treatments. This paper studied the effect of the thermal cycles of heating and cooling on a tempering medium type of 2.5% carboxymethyl cellulose solution in water. The main characteristic of a cooling medium is the absorption of heat from the part, which is influenced by the physico-chemical characteristics of the cooling liquid according to the degree of thermal fatigue. For this, the main properties of the environment are analyzed, such the chemical composition, corrosion capacity, wetting capacity and cooling characteristics. To analyze the change in properties during the operation, we studied the effect of thermal cycles on the physico-chemical characteristics of the quenching medium to determine the optimal period when the quenching medium could function in good parameters without the necessary corrections. For this purpose, cyclic and linear corrosion tests, FTIR compositional analyses and contact angle measurements were conducted.