Product Categories / Metal Treatment / Aluminum Treatment / powder-coating

Durachrome 1000

Product description

Durachrome 1000 is a homogeneous liquid
blend of chromium salts with special stabilizer.

Features

  •  Durachrome.1000 produces laminar
    golden yellow chrome conversion layer of
    0.6.to.1.2.g/m2 depending upon operating time and concentrations.

  •  Durachrome.1000 though operates at low temperature but provides excellent
    corrosion protective base for final finish.

  •  Durachrome.1000 is suitable for aluminum
    substrates, zinc alloy.

Application

  • Durachrome1000 is a specially formulated
    product for spray and immersion processes to form laminar golden yellow corrosion protective
    film on aluminum, galvanized steel and zinc alloys prior to final finish.

Physical & chemical Properties

Appearance          Liquid.
Color            Dark red
pH (1%) at 25 oC          1.9 ± 0.2
Sp. gr at 25 oC          1.25 ± 0.05
Cr (VI) Points (1%)          6.7±0.2
Free Acid Points (1%)        5.6 ± 0.2
Miscibility in water             Miscible.

Equipments

The main process tank must be of stainless steel or mild
Steel lined with PP, PVC or lead rubber or fiber. All other
parts in contact with the Durachrome 1000 solution
(Spraying nozzles, Chain guard, hosing) must be of
stainless steel resistant to acids.

Process Sequences

  •  Degreasing and etching.
  •  Water rinse.

  • Chromating with Durachrome 1000.
  •  Water rinse.
  •  DI water rinse
  •  Drying.

Operating Parameters

                                           Spray                   Dip
Concentration (v/v %)      1.2 to1.7             1.2 to1.7
Cr (VI) points                      7 to 11            7 to 11
Pointage (FAP)                    5.0 to 9.0       5.0 to 9.0

PH                                    1.7 to 2.3           1.7 to 2.3

Temperature (o C)          15 to 40            15 to 40
Time (min)                        0.5 to 2              1.0 to 3.0
Nozzle pressure (Bar)      1.0 to 1.5                 –
Drying temp ( o C)          70 to 90                70 to 90

  • Drying time min                  10 to 20             10 to 20
    Operating parameters could be changed according to
    different line applications and operating conditions.          

Initial Preparation

Add 12 to 17 liter of Durachrome 1000 per 1000 liter of operating volume for both spray and immersion systems.