Total acidity: this is an important indicator of the total acid content in the phosphating bath solution, usually between 70 and 130 points. Free acidity: the content of free acid has a direct impact on the phosphating effect, usually between 6 and 18 points.
Phosphate tank fluid control parameters
Author: Robby
The main control parameters of phosphating tank solution include.
Total acidity: this is an important indicator of the total acid content in the phosphating bath solution, usually between 70 and 130 points.
Free acidity: the content of free acid has a direct impact on the phosphating effect, usually between 6 and 18 points.
Temperature: The phosphating reaction needs to be carried out within a certain temperature range, usually between 75 and 85 degrees Celsius.
Time: The duration of the phosphate treatment is usually between 10 and 20 minutes.
These parameters have an effect on the phosphating results:
Total and free acidity: These parameters directly affect the chemical activity of the phosphating solution. Too high or too low an acidity will affect the quality and thickness of the phosphated film. Appropriate acidity can ensure that the phosphating film is uniform and dense, and improve the ability to prevent rust.
Temperature: temperature directly affects the speed and effect of phosphating reaction. The appropriate temperature can ensure that the phosphating reaction is fully carried out, the formation of high-quality phosphating film.
Time: the length of the treatment time will affect the thickness and quality of the phosphating film. Appropriate time can ensure that the surface of the workpiece is fully covered by the phosphating solution to form a uniform phosphating film.
Maintenance and management of phosphating tank solution:
Regular testing and adjustment of acidity: With the increase in the number of workpieces to be treated, the total and free acidity of the tank solution will gradually decline, and need to be tested and adjusted regularly. Usually, the total acidity is increased by adding phosphate solution, and the free acidity is reduced by adding soda ash.
Control temperature: ensure that the phosphating tank liquid in the appropriate temperature range for the reaction, if necessary, can be adjusted by heating equipment to adjust the temperature.
Control time: Ensure that the treatment time is within the specified range, which can be controlled by a timer or automated equipment.