What is zinc phosphate surface treatment?
Zinc phosphate is a commonly used metal surface treatment method, mainly used to prevent corrosion of metal materials and improve the adhesion of coatings. Zinc phosphate treatment is to form a zinc phosphate coating on the metal surface, which can provide a certain degree of corrosion resistance and coating adhesion.
The steps of zinc phosphate surface treatment are generally divided into the following:
1. Cleaning: First, clean the metal surface to remove oil, impurities, etc. Commonly used cleaning agents include alkaline cleaning agents and acid cleaning agents. You can choose the appropriate cleaning agent according to the characteristics of the material and the degree of contamination.
2. Pickling: After cleaning, there may still be some oxide layers or corrosion products on the metal surface, which require pickling. Pickling usually uses dilute sulfuric acid or hydrochloric acid solution to dissolve the oxides and corrosion products on the metal surface.
3. Zinc phosphate treatment: The metal surface after pickling is immediately treated with zinc phosphate. The zinc phosphate solution contains phosphate and zinc salt. The metal reacts with the salt in the solution to form a zinc phosphate coating. This coating can improve the corrosion resistance of the metal and the adhesion of the coating.
4. Rinse with clean water: After zinc phosphate treatment, the metal surface needs to be fully rinsed with clean water to remove excess zinc phosphate solution.
5. Zinc removal (optional): Zinc removal can be performed as needed. Zinc removal generally uses a pickling agent to remove zinc from the zinc phosphate coating, further improving the adhesion and corrosion resistance of the coating.
The specific process parameters and solution formula of zinc phosphate surface treatment will vary according to the requirements and use environment of different metal materials. Therefore, in practical applications, it is necessary to make reasonable selections and adjustments according to specific circumstances. Anhui Bona New Materials Technology Co., Ltd. was established in June 2017. It is located in Dongzhi Economic Development Zone, Anhui Province, covering an area of 153 acres. The total investment is 500 million yuan to build a new annual production of 158,000 tons of special environmental protection additives and functional materials. The company is mainly engaged in the production of special environmental protection additives (water-based thickeners, water-based silicone additives, oils, rubber and plastic additives, powder additives and special functional additives, etc.) and the production of functional materials (solvent-free resins, curing agents, water-based acrylics, water-based polyurethanes, various water-based adhesives and coatings, powder coatings, automotive adhesives, etc.).
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