germany standard black phosphated seamless steel tube for automobile
synopsis of process routing
cold drawn and bright NBK seamless steel tube is used as the tube to be phosphated, the phosphated is realized with th imported chemical fluid to form a black film, te antirust oil is absorbed by means of the micro pore on the film to prevent from the rust, two ends of tube are covered by the flap to prevent from the dust.
color of tube: bright black, color is homogeneously distributed on the tube surface, the tube has good property of antirust.
main application
used in hydrauli system, nested card connector (pipe joints) with matching
Types of inspection documents according to EN 10204 3.1.B Inspection certificate (inspector representing the manufacturer)
