BY-915 medium temperature precision pull tube phosphating agent
To reduce production costs and improve the stability of the agent, BY-915 is usually used at higher temperatures (55-70 ° C) and at more dilute concentrations.
First, the composition of BY-915 phosphating agent is (three components):
BY-915 tanking agent
BY-915 supplement
BY-131 accelerator
Second, the ratio of BY-915 phosphating agent in the medium temperature condition (55-70 ° C) is:
BY-915 dispensing agent 50kg
BY-131 accelerator 1 liter / m3
For example: When preparing a 1m3 phosphating solution, add about 50 kg of BY-915 tanking agent and add water to about 1 m3. About 1 liter of BY-131 accelerator was added about half an hour before phosphating, and the steel pipe was treated by uniformly stirring and heating to 60-70 °C.
Third, BY-915 phosphating agent phosphating steel pipe working conditions or control process is:
Free acidity: 0.5-1 point
Temperature: 60-70 ° C
Time: 10-15 minutes
Promoter: >1 point
Fourth, the use of instructions:
1. Consumption (kg): 5-6%
2, free acid (point): 0.5-1.2
3, total acid (point): 12-20
4, accelerator (point): ≥ 1 point
5, temperature (°C): 60-70 ° C
6, time (minutes): 5-10
7. Applicable scope: precision drawn tube, cold drawn steel
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