Product Categories / Metal Treatment / Steel Treatment / Iron Phosphating
Duraphos 656
Product description
Duraphos 656 is a manganese iron phosphate product used to produce heavy iron manganese layer in immersion process.
Feature:
- Duraphos 656 provide corrosion protection during storage and transportation.
- Duraphos 656 produce heavy porosity layer of manganese phosphate, improves corrosion resistant, decrease wear friction, and enhance the oil absorption properties of surface.
- Duraphos 656 is used with accelerator.
Application:
Duraphos 656 is used in immersion applications on steel and mild steel.
Physical & Chemical Properties:
Appearance : Liquid.
Color : light pink color
PH for (1%) at 25°C : 2.7 ± 0.2
Total Acid point (1%) : 1.45 ± 0.1
Free Acid point for (1%) : 0.5 ± 0.1
Sp.gr at 25°C : 1.068 ± 0.05
Miscibility in water : Miscible
Equipment:
The main process tank can be fabricated from stainless steel or acid resistant material. All other equipment in contact could be of stainless 316(L)
Operating Parameters:
Concentration (v/v %) : 20
Temperature (°C) : 80 to 95
Time (min) : 20 to 50
Free acid point : 3 ± 0.3
Total acid point : 17 ± 3
Process Sequences:
- Acid cleaning and pickling with HCl or H2SO4
- Water Rinse.
- Water Rinse.
- Activation
- Manganese Phosphating with Duraphos 656
- Water Rinse.
- DI Water Rinse.
- Drying
Initial Preparation :
For each 1000 liter operating bath:
- Add 200 liter of Duraphos 656, add chemical to water.
- Add 100 liter of Accelerator Duradd 65.
- Add 40 liter of Duradd 14 slowly to bath while mixing,
Reagents & Equipments
- 0.1N Sodium Hydroxide Solution.
- Bromophenol blue Indicator or Methyl orange
- Phenolphthalein Indicator.
- 50% Sulfuric acid solution.
- Conical flask 100 ml.
- Glass Burette 50 ml.
- 10 & 50 ml pipette.