Review on Improvement the Turbine Oxidation and Hot Resistant against Corrosion by Nickel–Based Superalloy

Abstract

High-temperature oxidation has been an important scientific and technological subject for many years since it is a life-limiting factor in most equipment operating at high temps. Turbine blades used in Iraqi electrical gas power stations frequently require expensive maintenance by traditional processes. These blades are made of nickel superalloys such as IN738LC, where this alloy was used as a substrate material in this research to repair its corroded surfaces. Currently, coatings used for high temps involve thermal barrier coatings (TBC), overlay, and diffusion. The protective properties of diffusion coatings are related to forming SiO2, Cr2O3, and Al2O3 scales on the silicide, chromite, or aluminide at high temperatures. Diffusion coatings were first created and are the most often utilized