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Rising fuel prices and more stringent vehicle emissions requirements are increasing the pressure on engine manufacturers to utilize technologies to increase efficiency and reduce emissions. As a result, interest in cylinder surface coatings has risen considerably in the past few years. Among these are SUMEBore® coatings from Sulzer Metco. These coatings are applied by a powder-based air plasma spray (APS) process. The APS process is very flexible, and can process materials which wire-based methods cannot, particularly metal matrix composites and pure ceramics. Applications range from small 2-stroke engines, motorcycles, and lightweight passenger car engines, up to high-speed diesel truck engines and medium-speed diesel engines. The compositions of the coatings can be tailored to the specific challenges in an engine, e.g., excessive abrasive wear, scuffing, corrosion caused by adulterated fuel, improved heat transfer from the combustion chamber into the water jacket, etc.

Rising fuel prices and more stringent requirements in the field of the vehicle emissions such as nitrogen oxides, particulate matter and carbon dioxide will increase the pressure on the engine manufacturers to utilize technologies which contribute to a reduction in these emissions. As a result, interest in cylinder surface coatings has increased considerably in the last few years, also in the SUMEBore® coating solution from Sulzer Metco. SUMEBore coatings are applied by a powder-based air plasma spraying (APS) process. Such an APS process is very flexible and can also process materials to which wire-based methods do not have any access, particularly metal matrix composites and pure ceramics. The compositions can be tailored to the specific challenges in an engine, e.g., excessive abrasive wear, scuffing, corrosion caused by adulterated fuel or high exhaust gas recirculation (EGR) rates, etc.