Determination of water heating system durability based on oxygen permeability and corrosion calculation
Abstract
Determination of water heating system durability based on oxygen permeability and corrosion calculation
Incoming article date: 07.11.2025This paper highlights the problem of determining the durability of water heating systems based on a comprehensive analysis of oxygen permeability and corrosion processes. The focus is on electrochemical corrosion of the steel elements of the system. Such types of corrosion as general, local, pitting and ulcerous are considered. Various experimental data were analyzed and quantitative dependences of corrosion rate, corrosion permeability and depth of ulcer corrosion depending on coolant temperature and dissolved oxygen concentration were obtained from them. For water heating systems with polymer pipes without an oxygen barrier, a methodology for calculating the dynamics of oxygen concentration in the coolant has been proposed. A criterion for assessing the durability of the system has been developed, which connects the accumulated depth of peptic ulcer corrosion with the wall thickness of the most thin-walled element. It has been shown that the durability of the system directly depends on the initial oxygen content and oxygen permeability of polymer pipes. The proposed method makes it possible to predict durability and plan equipment replacement, preventing accidents.
Keywords: corrosion, pitting corrosion, heating systems, polymer pipes, heat carrier, oxygen permeability, durability