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Durapass 790
Product description
Durapass.790 is a concentrated chromate based product for passivation of aluminum and steel iron coil coating mprocess lines
Application
Durapass.790 is especially made for coil coat using
Squeegee technology or Chemcoater technology.
Features
- Durapass.790 is used prior to application of an organic
coating. - Durapass.790 provides excellent corrosion protection
and adhesion properties, without effecting the
brightness and smooth surface.
Physical & Chemical Properties
Appearance Dark Black Green Liquid
Sp. gr at 25oC 1.095 ± 0.05
PH for (1%) at 25oC 3.2± 0.2
Total Acid point (1%) 1.47 ± 0.08
Miscibility with water Miscible at all ratio
Equipments
Durapass.790 tanks, pumps, piping should be made of
acid resistant stainless steel, PVC.
Process Sequences
- Degreasing /cleaning.
- Warm water Rinse
- Warm water Rinse
- Application using Durapass 790
- Air Dry
Operating Parameters
Concentration 20 % to 25 %
pH at 25 oC 2.3±0.4
Total acid point 29 to 37
Temperature (OC) 25 to 45
Initial preparation
- Add 200 to 250 liter Durapass.790 and continue
to 1000 liter of water. - Durapass.790 operating temperature should be
within the range 25o
to 45oC - Prepare the solution in preparation tank before
dose to tray.