Chemical vapor coating of non-metallic and metallic parts has found increasing industrial application in recent years. Very thin, uniform coatings of chemicals on aluminum, stainless steel, gold, silver, and other metals parts offer important engineering and economic possibilities. Such coatings may increase corrosion and wear resistance, provide conductive surface on insulating materials, and high finishes for reflectors.
Such films are generally applied in an evacuated chamber containing the parts to be coated and the chemical vapor source. High frequency induction heating is ideally suited for heating the metal vapor source either to slightly below the melting temperature or frequently well above while it is held in a crucible.