Several industrial bolts are treated by phosphating as well as fueled oil, usually zinc phosphating as well as manganese phosphating. Phosphating is less costly than galvanized and also poor rust resistance. Fueling oil should be used after phosphating. The deterioration resistance is very closely related to the performance of the oil. As an example, the neutral salt spray test only takes 10 ~ 20 hrs after using basic anti-rust oil after phosphating, and 72 ~ 96 hrs for good anti-rust oil. Zinc phosphating lubrication is far better than manganese phosphating, manganese phosphating corrosion resistance, good wear resistance. It can be used at 107 ~ 204 β. Phosphating torque - preload consistency is excellent, often utilized in some fundamental parts of the link, such as steel structure connection pair, engine attaching rod screws, nuts, cylinder head, major bearing, flywheel screws, wheel bolts and also nuts. Phosphating of high stamina bolts avoids hydrogen embrittlement, so phosphating surface treatment is typically used for screws of quality 10.9 or above in the commercial field.