Product

Primer treatment and rust-proof treatment for aluminium coating

 

 

1.Process drawing

2.Examples

Process Degreaser Corrosive agent Phosphatizing agent After treatment
Chromium-free coating first coat FC-315 CL-391 CT-3796 LN-5049
Chromium-free un-coated CT-3762
Free of hexavalent chromium CT-3700

3.Degreaser

Degreaser Type Treatment condition Features
Method Temperature (℃) Time (min)
FC-315 Weak base Soak 65～70 1～10 Non-corrosive, free of N (contains boron)
RL-53 Medium alkali Soak 50～80 5～10 Non-corrosive (silicate series)
FC-E3011 Weak base Spray/soak 45～55 2～5 Non-corrosive, direct decomposition type surfactant (silicate series, free of boron)
FC-E3012 Medium alkali Spray/soak 45～55 2～5 Corrosive, direct decomposition type surfactant (silicate series, free of boron)
FC-346 Medium alkali Soak 50～65 3～5 Non-corrosive
FC-4418 Strong base Spray 60～70 1～20S  

4.Corrosive agent

Corrosive agent Type Treatment condition Features
Method Temperature (℃) Time (min)
CL-391 Strong base Soak 60～80 Appropriate Alkaline corrosive agent for aluminium materials
  Strong base (phosphoric acid series) Soak 42～48 3～6 Adopts acidic corrosive agent (rust remover)

5.Phosphatizing agent

Phosphatizing agent Type Film appearance Coating weight (mg/m2) Treatment condition Features
Method Temperature (℃) Time (min)
CT-3700 Trivalent chromium Colorless～interference color Cr5～10 Spray/soak 45～55 1～3 Free of hexavalent chromium, in first coat
CT-3762 Zircon salt Colorless Zr10～100 Soak 50～70 30 sec.～3 Free of chrome, in wear-resistant first coat
CT-3796 Zircon salt Colorless～interference color Zr10～100 Spray/soak 45～55 1～3 Free of chrome, in first coat

6.After treating agent

After treating agent Type Film appearance Treatment condition Features
Method Temperature (℃) Time (min)
LV-5049 Organic Colorless Soak Normal temperature～55 10 sec.～1分 Free of chrome, contains resin, after treating agent
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