Chromium-free passivator for aluminum alloy in Pearl River Delta

包装：

桶装

规格：

25kg/桶

Features:
The Pearl River Delta chromium-free passivator for aluminum alloy is specially suitable for passivation of aluminum and aluminum alloys.
It can form a colorless corrosion-resistant passivation layer on the aluminum surface, which can provide good bonding force for subsequent coating layers.
It is a green and environmentally friendly product.
Simple operation and easy to control.
Solution composition and operating conditions:
Raw materials and operating conditions
Standard cylinder opening volume
Range
Chromium-free passivation agent for aluminum alloy in the Pearl River Delta
< br/>
Temperature
℃
~3℃
Time



Preparation solution:
For each liter of tank liquid, first pour half of the pure water into the tank and turn on the pump to stir. Then add about kilograms of chromium-free passivator, and add water to liters.
Solution analysis method:
Take ml of free acid bath solution, add 3 ~ drops of bromophenol blue indicator, and titrate with sodium hydroxide. The end point is reached when the bath solution changes from yellow to blue-green. .The number of sodium hydroxide is the number of free acidity points.
Free acid range: Dip: - Spray:
To increase the free acidity: add chromium-free passivator to each bath.

Equipment requirements
Project requirements
Tank body made of stainless steel or lined with hard materials
Racks made of stainless steel or fluorine-resistant materials
Moderate air mixing is required , uniform air mixing
Circulation, lining or type 3 stainless steel circulation pump
Adding system needs, the feeding pump material is, or, can withstand strong alkali