.Process characteristics:
The Pearl River Delta aluminum alloy corrosion-resistant zinc immersion liquid is a zinc immersion agent that requires additional trace substances to be used in conjunction.
It can produce a dense and uniform thin zinc layer on the surface of aluminum alloy, providing good bonding force for subsequent processes such as direct copper plating, nickel plating, tin plating, chemical nickel plating, etc.
Especially suitable for electroplating aluminum alloy wheels.
.Solution composition and operating conditions
:
<= dd Raw materials and operating conditions
Standard cylinder volume
Range
Pure water
Milliliters /L
- mL/L
Pearl River Delta Aluminum Alloy Corrosion Resistant Zinc Dip Liquid
mL/L
- mL/L
Temperature
-℃< br/> -℃
Time
- Seconds
- Seconds
.Solution maintenance
:
Low load applications can directly use corrosion resistance For every additional .g/liter of sodium hydroxide added to the zinc precipitating agent for strong corrosion-resistant aluminum materials, .ml/liter of zinc precipitating agent for aluminum materials with strong corrosion resistance can be added. One liter of solution can handle 1,000 square meters of workpiece without addition.
In high-load applications (such as aluminum alloy wheel hub electroplating), zinc sinking agent can be used to supplement the metal components and adjust the alkalinity respectively.
Add according to the specific gravity of the solution: .% (volume ratio) or .% (volume ratio) zinc precipitating agent supplement and .% (volume ratio) supplement can be added to increase the specific gravity of the unit.
Add according to the analysis results:
Add according to the titration value: per increase. The titration value can be added. ml/liter
Add according to the sodium hydroxide concentration: per increase. g/liter of hydrogen Sodium oxide content can be added in ml/l.
Notes:
When adding supplements to strong alkaline solutions, they need to be added in small amounts and multiple times with stirring to avoid local overheating of the solution during work.
If the working fluid contains chemicals, be careful to avoid mixing them with acids to avoid danger.
Do not add a large amount of additives during production. Add small amounts multiple times to mix the working solution evenly and avoid roughening the working surface.
The working temperature should be less than ℃. Too high temperature will make the zinc crystal crystal rough and reduce the bonding force between the substrate and the subsequent electroplating layer.
Equipment requirements
Project requirements
Tank, or high density
Hanger, or stainless steel
Air mixing does not require moderate and uniform aeration and mixing
Circulation needs - one cycle
Filtration system needs continuous circulation filtration
Exhaust needs
Cooling system needs
Heating system needs
Pearl River Delta Aluminum Alloy Corrosion Resistant Zinc Dip