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Zn-Ca series
mid-temperature phosphate coating agent
Zn-Ca series mid-temperature phosphate coating agent, Don’t need the surface modifier procedure, and do not need to add the neutralizer and the accelerator, so long as use it by diluting with water in proportion under the specified temperature scope, then it will form one even, compact perse phosphating film. This phosphating film has good anticorrosion performance, may provide the rust prevention for a long time, simultaneously the film has excellent adhesion to each kind of coatings, each overcoatability surpasses the national standards. The solution sediment are few, do not need the frequent clearing.
2 Usage
2.1 Working solution prepared( calculated by one ton)
a) Add about 500KG water to tank ,then add Zn-Ca phosphate coating agent 167KG, stir evenly and supply remaining water.(Phosphate coating agent : water=1:5)
b) Heat to specified processing temperature.
2.2 Working solution management:
Total acidity: 35-65
Free acidity: 3.5-6.5
Temperature: dipping 60-70 ℃
Time: dipping 4-15min
2.3 Supplement and adjustment of working solution(calculated by 1 ton):
The concentration of working solution changes continuously in the continuous processing process, so make a measure and add original liquid to assure the best status.
Generally add 4KG original liquid in one ton working solution, which can improve one points of total acidity each time.
3.Package
200Kg/barrel
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