Composition of zinc oxide in phosphating solution

2022-06-17

Low-temperature zinc-based phosphating liquid zinc oxide is suitable for various primers, liquid and powder products before coating. It can be phosphated by immersion or spraying, and is suitable for automotive and appliance coatings. It features fast phosphating speed, less sludge, and wide applicability: ultra-low temperature rapid phosphating, no heating required, immersion and spraying, simple management, suitable for various workpieces and processes; long cycle, less frequent addition, simple and convenient to use.

　　Composition of zinc phosphate in phosphating solution

　　Brush phosphating is a special pretreatment method, namely brushing Zinc phosphate in phosphating solution Through brushing (application) or immersion, it contacts the metal surface and undergoes complex chemical and electrochemical reactions to form a certain amount of zinc phosphate on the metal surface. The thickness (film weight 2-6g/m2) is an insoluble dense coating film mainly composed of phosphate. Its particularity lies in the fact that brush phosphating zinc phosphate can be used on workpieces with oil and rust, so brush phosphating zinc phosphate must have excellent oil and rust removal functions.

　　The quality of the brush phosphating film depends on its degreasing, derusting and phosphating effects. In order to obtain a high-quality brush phosphating film, it is necessary to scientifically optimize the combination of degreasing agent, derusting agent and zinc phosphate in phosphating solution, which is also a difficulty in brush phosphating Zinc phosphate in phosphating solution One of the difficulties in development. Due to the unique advantages of brush phosphating (simplified process, reduced equipment and operating area, shortened working hours, improved labor productivity, on-site operation, etc.), within a certain range (such as large steel components or partial phosphating, etc.).


Composition of zinc phosphate in phosphating solution


　　Low-temperature zinc system Zinc phosphate in phosphating solution Suitable for various primers, liquid and powder products before coating, can be immersed or sprayed phosphating treatment, suitable for automotive, electrical coating, phosphating speed is fast, less slag, wide range of applications, etc.: ultra-low temperature rapid phosphating, no heating, immersion and spraying, simple management, suitable for various workpieces and processes; long cycle, less addition times, simple and convenient to use. Suitable for various iron, zinc, aluminum workpieces and processes. The phosphating film is dense and has good alkali resistance. Suitable for low-temperature, medium-temperature, and wide-temperature conditions, and can be used for spraying and immersion of workpieces. Suitable for various iron, zinc, aluminum workpieces and processes, especially high-end coating processes. The zinc phosphate in phosphating solution used in primers before coating has fast phosphating speed, good corrosion resistance, and good compatibility with paint; good rust prevention and phosphating corrosion performance, copper sulfate dripping can reach 5-30 minutes; used for friction reduction and lubrication phosphating of cold drawing and cold extrusion parts; wear resistance, friction reduction and phosphating treatment of precision parts, load-bearing bodies and moving bodies.

　　Phosphating solution is basically a film-forming substance, and the phosphating film is formed by the deposition of metal phosphate, the main component of which is metal phosphate. Different types of phosphating solutions have different compositions. For steel zinc phosphating, the film-forming components of the phosphating solution mainly include free phosphoric acid and zinc dihydrogen phosphate; for manganese phosphating, the alkaline film-forming components in the phosphating solution are phosphoric acid and manganese acid phosphate; zinc calcium phosphate phosphating solution contains free phosphoric acid, zinc dihydrogen phosphate and calcium dihydrogen phosphate.


关键词:

上一条:

Formulation and component analysis of zinc oxide in phosphating solution

下一条:

Zinc oxide manufacturers for phosphating solutions: What influences the price of zinc oxide for phosphating solutions and its sun protection mechanism?