Abstract: A carbon scraper, a method of manufacturing a system with a carbon scraper, and method of scraping carbon from a piston of an internal combustion engine are provided. The carbon escaper includes an outer annular metallic shell portion having an annular recess therein. The annular scraper also includes an inlaid thermal barrier coating portion positioned within the annular recess of the outer annular metallic shell portion such that the inlaid thermal barrier coating portion is concentric with an outer annular metallic shell portion.

Abstract: A carbon scraper, a method of manufacturing a system with a carbon scraper, and method of scraping carbon from a piston of an internal combustion engine are provided. The carbon escaper includes an outer annular metallic shell portion having an annular recess therein. The annular scraper also includes an inlaid thermal barrier coating portion positioned within the annular recess of the outer annular metallic shell portion such that the inlaid thermal barrier coating portion is concentric with an outer annular metallic shell portion.

Abstract: The impellor, housing, flow channels, inlet and outlet flow passages of a pump used to pump a highly abrasive liquid at high volume. The flow surfaces are prepared, a primer is applied, and polyurea is applied on top of the primer to provide a protective coating rivaling extremely hard surfaces. The coating thus applied has at least the durability of expensive-to-apply hard coatings such as tungsten carbide, and siloxirane ceramic and ceramic metal filled epoxies. In addition, it minimizes the occurrence of cavitation within the pump housing, flow channels and passages.