Heat exchanger, especially a coiled tube heat exchanger of a water heater, is coated using a plasma stream containing added silicon dioxide, aluminum oxide, silicon compound and-or titanium compound

摘要

Heat exchanger coating uses a plasma stream containing added SiO2, Al2O3, Si compound and/or Ti compound. A heat exchanger is coated by exposure to a plasma stream which flows through the heat exchanger preferably in the direction of the off-gases and which contains SiO2, Al2O3, Si compound and/or Ti compound added in the liquid or gaseous state.