A method for coating the internal cylinder bores of a cast aluminum engine block comprising the steps of casting an engine block of aluminum alloy, thermally spraying a wear-resistant coating onto cylinder walls in the engine block by melting the tip of a rotating iron-based alloy rod with a plasma torch...http://www.google.com.au/patents/US5466906?utm_source=gb-gplus-sharePatent US5466906 - Process for coating automotive engine cylinders
