The process of Screw Phosphate Coating is the corrosion-resisting phosphate coating produced on the iron materials’ surfaces during the chemical process. No matter traditional producing line or automatic producing line, it can produce two kinds of screw products of gray and black phosphorous.
The Screw Phosphating is widely used on the final finished products, such as Screws, Nuts, vehicle parts… Its features are included：
1.The surface of product is smooth and dense：
The smooth and dense coating can make the surface have highly corrosion-resisting and shiny after smearing anti-rust oil on the surface.
2.The management of chemicals is easy and convenient： It is easy for the works to operate and can lower the labor costs and labor errors. 3.Great production and excellent corrosion-resisting：
The speed of chemical reaction is fast. It also raises the quantity and quality, as well as the great corrosion-resisting. 4.Low cost and high economic benefit： You can only use little quantity of chemical. It saves money and has great economic benefit.
