The authoritative public forum
  for Metal Finishing since 1989
  

  -----

Choosing between Phosphating methods

2007

We are manufacturers of machine tools. We are setting up a pretreatment and powder coating plant for processing of our machine guards made of 3mm mild steel sheets.

I would like to know , which phosphating methods out of the three should we design our pretreatment system for:

1. Hot di-cationic process(70 degC)
2. Low di-cationic process (25-30 deg C)
3. Tri-cationinc process (30 deg C)

Regards
Kapil Dhand

Kapil Dhand
Own factory - Ghaziabad, UP & India

---

Dear Mr. Dhand

Go for Tri-cation Zinc Phosphate, this is the best process and is widely used in India.

It has less processing time and saves energy.

Best Regards,

Anurag Kanaujia
- New Delhi
2007

---

2007

Dear Mr. Kanaujia,

thanks for the reply,
In case we go for tri-cationic zinc phosphate,

1.At what temperature should we do the phosphating?

2. What kind of agitation should we do
a) air agitation, or
b) recirculation using pumps

Kapil Dhand
- India

---

Good Day

My Dear the suitable way for your application the third one you will take Excellent Quality

Yasser Metwalli Osman
- U.A.E, Ajman
February 11, 2008