Zinc Phosphating Process (POWDER COATING)

Zinc Phosphating Process (POWDER COATING)

Zink Phosphate is a chemical process which is used for improve the life of product which is power coated.
Zink Phosphate may be 3 tank process, 7 tank process and 11 tank process.
If you want to know the zink phosphating process then you should know about the materials where which will be used or installed. Most of the powder coated material application used for outside applications.
So Zinck phosphate process is the process of creating a layer of zink phosphate on material which is prevent to materials from rust .

1. DE-Greasing 

2. Water Rinse-1 

3. DE-Rusting

4. Water Rinse-2 

5. Surface Activation 

6. Phosphate 

7. Passivation

Control Parameter

1. DE-Greasing

*Materials:-RB-235 +DM Water

*Operation Parameters:-

    Conc      :  5-6%

    Temp      : 60-65° C

    Dip time  :10-15 min

    Pointage :50-60
As you know that degreasing process does remove the oil content from the product. 

zink Photostatting process

2. Water Rinse-1

When we dip the materials in Degreasing tank the chemicals of this tank is stick with the product so we dip the materials in Water Rinse-1 tank for cleaning the chemicals from the product. 

*Materials:-  Water*Operation Parameters:-    pH Value      :-7.0-9.0    Temp            : Room Temp    Dip time       : 1 min

    

3. De-Rusting

After cleaning the materials in tank 2 materials which dip de rusting tank for removal the Rust from the product if materials or product is rusted. 

*Materials:-TRR-311 + DM Water*Operation Parameters:-    Conc       :  20-25%    Temp       : Room Temp    Dip time  : 10-20 min    Pointage :20-24 

4. Water Rinse-2

As we know the de rusting tank contains so chemical solution it also stick at product so only for cleaning purposes we dip the materials or product in water Rinse 2 tank.

*Materials:-Water

*Operation Parameters:- 
 pH Value     : 5.0-7.0   

 Temp           : Room Temp   

 Dip time       : 1 min

5. Surface Activation

After cleaning the materials in tank 4 we dip the materials there is removal of week boundry layer also extra fine cleaning, reduction of metal oxide .

*Materials:-RBA-401 + DM Water

*Operation Parameters:- 

 Conc     :  0.1-0.2%   

 Temp     : Room Temp   

 Dip time : 1-2 mint   

 PH         : 9-10

6. Phosphate

*Materials:rustbond-523C+DM Water

*Operation Parameters:- 

 Conc     :  4-5%  

Temp     :  35-55° C 

 Dip time: 10-12min  

Pointage: TA :-  24-28     

              FA :- 0.8-1.2       

            TV :- 2-4

7. Passivation

*Materials: RB-667+DM Water
*Operation Parameters:-  
Conc       :-  0.3-0.5%  
Temp       :-  Room Temp  
Dip time   : 1-2min  
PH           : 4.5-5.5

  

Chemical tank

After the pre-treatment we go for the next process drying to product by fan or manual further we go for powder coating .
we will explain the every details of powder coating soon.

please check the more knowledge about Industrial work below.

1.Requirements of Quality control/Assurance 
2.7 Quality control tools(7QC)
3.Layout Inspection
4.Panel Checkers Part Inspection In sheet metal (Automobile)