Room temperature zinc phosphating agent

包装：

桶装

规格：

25kg/桶

.Features: Room-temperature zinc-based phosphating agent is suitable for phosphating treatment of cold-rolled plates, galvanized plates, and aluminum plates.
The phosphating film layer is uniform, dense and gray in color, which can provide good bonding force for subsequent coating layers.
Simple operation and easy to control.
.Solution composition and operating conditions:
Raw materials and operating conditions
Standard cylinder volume
Range
Zinc phosphating agent
Kg/L
～kg/L
Neutralizer
Kilogram
～kg
Accelerator
.kg
.～kg
Temperature
℃
~3℃
Time
Minutes
Seconds and minutes

3. Prepare solution:
When opening the cylinder (liters), Add 3/3 of the volume of the prepared solution to the tank.
Turn on the pump circulation, add kilograms of zinc-based phosphating agent, and about kilograms of neutralizing agent (the neutralizing agent should be diluted with 2 times of water first, and then added slowly while stirring), and detect the free acid and total acid. to the required value.
Then add water to the working fluid level.
Add .kg accelerator before work.
.Solution analysis method:
Total acid: Take ml of bath solution, add ~1 drop of phenolphthalein indicator, and titrate with sodium hydroxide until a stable pink color just appears. The amount of sodium hydroxide consumed is Total acid points.
Free acid: Take 1 ml of bath solution, add ~1 drop of bromophenol blue indicator, add 1 ml of pure water, and titrate with sodium hydroxide to blue-green (under sunlight) or blue-violet (under incandescent lamp), hydrogen The number of sodium oxide consumed is the number of free acid points.
Accelerator: Fill the fermentation tube with tank liquid, then tilt the fermentation tube to remove the air from the closed end, add York sulfamic acid crystals and flow into the closed end. At this time, quickly stand the fermentation tube upright for three minutes and then take a reading.
.Control range
Total acid: ~
Free acid: .~
Acceleration degree: cold rolled sheet ~ galvanized sheet ~
. Equipment requirements
Project Requirements
Trough body, or high density.
Hanging fixture, or type 3 stainless steel.
Air agitation requires moderate and uniform air agitation.
Circulating, lined or type 3 stainless steel circulating pumps.
According to the requirements of the adding system, the material of the feeding pump is , or, which can withstand strong alkali.
The slag removal filtration system uses a filter press to continuously remove slag.