Precision cold drawn and bright seamless steel tube is used as the tube to be phosphated. The phosphated is realized with the imported environmentally-friendly chemical fluid to form a black film. The antirust oil is absorbed by means of the micropore on the film to prevent from the rust.

Features: Bright black, Color is homogeneously distributed on the tube surface. The tube has good property of antirust.

Application: Used in cars, coach, locomotive and construction machinery vehicles(such as digger, bulldozer, overhead working truck, sweeper, concrete pump truck etc)