At present, the automotive pretreatment industry is full of challenges and competition. With the increasingly strict environmental protection regulations, the increasing cost of energy and raw materials, and the rising labor cost, the suppliers of raw materials are constantly carrying out technological innovation. The invention of zirconia conversion film technology has brought a new development prospect to the automotive pretreatment industry.

Before painting, steel usually needs to be pretreated, including degreasing, rust removal, etc. chemical pretreatment methods usually need to form a layer of chemical conversion film on the surface of steel. The conversion film has a certain anti-corrosion ability, which can avoid rusting in a short time before spraying, increase the surface roughness of parts, and enhance the binding force between coating and substrate. At present, most of the phosphating process is used. With the continuous promotion of energy saving and emission reduction, the new phosphorus free conversion film (ceramic film) is quietly replacing the traditional phosphating film. Ceramic liquid should be the so-called zirconium system, zirconium titanium system, silane system, zirconium silane system, etc.

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