New low-cost iron aluminide coatings can increase corrosion resistance in harsh media to four times of mild steel

What is the News?

Scientists have developed low-cost iron-based intermetallic powders that can be used as a corrosion-resistant coating for materials exposed to harsher environments like high temperature in thermal power plants where oxidation, corrosion and wear and tear takes place simultaneously.

Background

Wear and corrosion cause major damage to materials that are exposed to harsher environments like high temperatures. Hence, there is a need to protect these materials for enhanced economic viability. 

At present, thermally sprayed Chromium Carbide-Nickel Chromium Powder coatings have been widely used to protect the material surface. However, the powder is expensive due to the presence of Co and Ni elements.

What have the scientists developed?

Scientists have developed low-cost iron-based intermetallic powders that can be used as a corrosion-resistant coating for materials exposed to harsher environments like high temperatures.

The coatings have demonstrated an increased wear resistance by 30-40% than the mild steel under solid particle erosion wear mode implying that iron-based coatings can be used for high-temperature erosion resistance applications.

Source: The post is based on the article “New low-cost iron aluminide coatings can increase corrosion resistance in harsh media to four times of mild steel” published in PIB on 10th May 2022