This article presents an in-depth investigation into the susceptibility of boilers to corrosion at both low and high temperatures. The article highlights the adverse impact of corrosion on efficiency and maintenance costs and provides a comprehensive overview of various coating methods, materials, and key parameters for different exposure conditions. Additionally, the article delves into the significance of porosity in corrosion, addressing its impact on material integrity and its role in regulating the corrosion process. The findings, derived from recent studies, offer valuable insights into different coating methods, environmental variations, oxygen flow rates during different spraying methods, comparison of hybrid and conventional coating methods, and strategies for mitigating porosity-related corrosion. The collective efforts of numerous researchers highlighted in this article offer valuable insights into the optimal selection of materials and processes for future boiler corrosion research. The information presented in this article can significantly aid in enhancing the efficiency and longevity of boilers while reducing maintenance costs.