Synergistic damage mechanisms of high-temperature metal corrosion in marine environments: A review

Abstract

Marine equipment power systems often operate under high-temperature conditions, and metal component corrosion in high-temperature environment can lead to failure of the entire system, substantial economic losses and environmental problems. High-temperature coatings can protect metals against corrosion through thermal insulation and shielding. However, compared with a normal temperature, a high-temperature marine environment significantly exacerbates coating damage and metal corrosion. The abundance of certain chemical factors, such as the presence of chloride ions, metal ions, and undissociated organic acids and acidic pH levels, and certain biological factors, such as corrosive microorganisms and toxic substances derived from the substrate pose serious challenges for high-temperature coatings and metal protection measures. Moreover, the type of coating, preparation process and type of substrate are closely related to metal corrosion in high-temperature environments. In this review, these potential corrosion enhancement factors and corrosion mechanisms are introduced, and engineering perspectives on the control of high-temperature metal corrosion (HTMC) are provided.