Thermal spray techniques have been extensively used to deposit coatings of varying compositions on a variety of industrial components for life enhancement under wear and corrosion prone environments at ambient and high temperatures. A number of components used in power generation systems most commonly encounter high-temperature erosion–corrosion. This review article briefly summarizes various thermal spray techniques and coating characteristics that are relevant to erosion–corrosion applications followed by detailed discussion on the erosion–corrosion fundamentals and testing methods. Further, ambient and high-temperature erosion–corrosion behavior of WC- and CrC-based cermet coatings and oxide coatings have been investigated, compared, analyzed and presented. Based on the analysis of results reported so far, the methodologies to enhance the erosion–corrosion resistance of coatings have been proposed both for ambient and high temperature applications. The future scope of work that needs to be explored to contribute further developments has also been identified and presented.

热喷涂技术已被广泛用于在各种工业部件上沉积各种组成的涂层，以延长环境和高温下易磨损和腐蚀环境下的寿命。发电系统中使用的许多组件最常遇到高温腐蚀。这篇综述文章简要总结了与腐蚀-腐蚀应用相关的各种热喷涂技术和涂层特性，然后详细讨论了腐蚀-腐蚀的基本原理和测试方法。此外，已经研究，比较，分析和介绍了基于WC和CrC的金属陶瓷涂层和氧化物涂层的环境和高温腐蚀腐蚀行为。根据到目前为止报告的结果分析，已经提出了用于环境和高温应用的增强涂层耐腐蚀性能的方法。还确定并提出了需要探索以促进进一步发展的未来工作范围。