HH-DW-1 Film-Forming Agent
Category:
Product Features:
★ Operates at lower temperatures, reducing energy consumption;
★ The phosphating film exhibits excellent corrosion resistance;
★ The film-forming crystals are uniform and dense;
★ Free of heavy metals, helping to mitigate environmental pollution.
Used as a primer before coating to enhance the adhesion of the overlying film and the corrosion resistance of the coating.
Service Hotline: +86-513-88442062
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Product Details
This product is a low-temperature, low-residue, heavy-metal-free conversion coating agent that exhibits excellent compatibility with various coating systems, making it an ideal primer for coating applications.
Typical Data
| Project | Quality indicators |
| Appearance | Colorless, transparent liquid |
| Total Acidity | 18–25 points |
| Free acidity | 0.8 to 1.5 points |
| Accelerator | 2 to 3 o'clock |
Precautions
How to use
1. Process Flow
Pre-degreasing → Main degreasing → Water rinsing → Water rinsing → Surface conditioning → Phosphating → Water rinsing → Water rinsing → Passivation → Drying
2. Preparation of the plating bath (per 1 cubic meter)
Inject 80% of the total water into the tank; add 150 kg of tank conditioner HH-DW; add 1.6 kg of neutralizing agent ZH, dilute it with water, and then slowly introduce it into the tank while stirring continuously; top up with additional water to reach the final volume of 1,000 mL and mix thoroughly; heat the treatment solution to the specified temperature and measure its acidity; prior to starting the treatment, add 2–3 kg of AC promoter and mix uniformly, then determine the promoter concentration.
3. Tank Solution Refilling and Adjustment
To increase the total acidity of the working solution, add HH-DM-1 phosphating solution; typically, adding 3.5 kg of HH-DW-1 phosphating solution will raise the total acidity by 1 unit.
To increase the free acidity of the working solution, HH-DW-1 phosphating solution should also be added; typically, adding 2 kg of HH-DW-1 phosphating solution raises the free acidity by 0.1 unit. To decrease the free acidity, neutralizing agent ZH should be added; for every 0.16 kg of ZH added, the free acidity decreases by 0.1 unit.
Control of the AC accelerator: After a period of use, the concentration of the accelerator in the working solution decreases; therefore, its concentration should be measured regularly, and 0.2 kg of accelerator should be added to increase the concentration by 1 unit.
Precautions
1. The temperature must be maintained within the specified range during use;
2. Total acidity and free acidity must be maintained within the normal range during use;
3. The dosage of the accelerator must be strictly controlled during the process;
4. Do not allow oil contaminants to enter the phosphating solution;
5. The degreasing, derusting, and water rinsing processes performed on the workpiece prior to phosphating must comply with the process flow; otherwise, the quality of the subsequent phosphating will be affected.
Packaging, Storage, and Transportation
30 kg, 1,000 kg (Note: Packaging shall be in plastic drums or iron drums.)
Packaging, storage, and transportation shall comply with non-hazardous goods requirements.
Shelf life: one year
Keywords:
HH-DW-1 Film-Forming Agent
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Nantong Kexing Chemical Co., Ltd.
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