Stainless steel heat exchanger - is coated with copper to prevent corrosion of steel in contact with water

摘要

At least part of the surface of a stainless steel heat exchanger, which is in contact with liquid, is covered with a thin layer of copper (alloy). The Cu (alloy) protects stainless steel against pitting and crevice corrosion in contact with water contg. Cl ions so that cheaper (semi)-ferritic stainless steels (which have good thermal conductivity) can be used to construct condensers and heaters including solar energy heaters.