Product Categories / Metal Treatment / Additives

Duradd 13

Product description

Duradd 13 is a liquid blend of sodium nitrite and special additives which is used in zinc Phosphating bath as an accelerator.


  • Duradd 13 is zinc phosphate accelerator
  • Duradd 13 is used to accelerate the zinc phosphating process and


  • Duradd 13 is added to zinc phosphate main tank in spray and immersion processes.

Physical & chemical Properties

  • Appearance     Liquid. Color    Clear Yellowish PH(Direct) at    25oC 9.0 ± 0.5 at    25 oC 1.15 ± 0.05    Miscibility in water    Miscible


  • See the original zinc phosphate product TSDS Duraphos products.

Process Sequences


Operating Parameters

  • Duradd 13 is adding in range of 500 to 1500 ml/ 1000 just before starting the line and depend upon the substrate to be treated.

Initial Preparation