Reliability Assessment of Hull Steel Based on Thin Liquid Film Corrosion Simulation

Metal corrosion is one of the primary forms of material failure, particularly in marine environments characterized by high salinity and humidity, where shipboard equipment is prone to the formation of thin liquid films on its surface. These films significantly accelerate the corrosion process, thereby compromising the reliability and safety of the equipment. Existing research has predominantly focused on corrosion behavior under static liquid films, while studies on the evolution of dynamic liquid films and their synergistic effects with environmental factors on corrosion mechanisms remain limited. Based on dynamic environmental data collected during actual ship operations, this paper comprehensively analyzes the influence of factors such as temperature, humidity, and salt deposition on the evolution of thin liquid films and metal corrosion behavior. A model correlating dynamic liquid film evolution with corrosion degradation is developed, and reliability assessment is conducted using the Monte Carlo method. The study aims to elucidate the mechanisms of corrosion induced by dynamic liquid films, providing a theoretical foundation for corrosion protection and service life prediction of shipboard equipment.