METHOD FOR MANUFACTURING ALUMINUM SPRAY-COATED ANTI-CORROSIVE OPTICAL UNIT

摘要

Disclosed herein is a manufacturing method of an optical unit having an aluminum coating layer formed on the surface of a stainless-steel loose-tube. The method improves productivity and price competitiveness of products through spray-coating of aluminum using arc heat. That is, such a method comprises the step of producing fine aluminum powder by liquefying an aluminum preform using arc heat, and spray-coating the fine aluminum powder on the surface of the stainless-steel loose-tube by using high-pressure air.