A description 


 Two deal with the process: 

 Degreasing → washing → (rust) → washing → Surface Conditioning → phosphate → washing → drying 

 Three working solution preparation in (a ton of Bath): 

 A treatment tank into the metering of water. 

 2 while stirring while adding the SD # 287 dose of 50-70 kg and accelerant 2-3 kg. 

 3 Determination of total acid, free acid and the concentration of accelerator. 

 Four operating parameters of the standard: 

 Engineering 
 Use of the bath 
 Concentration (PT) 
 Temperature 
 Processing time 
 Update cycle 

 Soak 
 5-7% of the zinc phosphating agent 
 Total acidity of 30 to 35 
 At room temperature ~ 50 ° C 
 8-10 minutes 
 6-12 months 

 0.2-0.3% of the accelerator 
 1.5 to 2.5 

 Spray 
 4-5% of the zinc phosphating agent 
 20 to 30 of the whole acidity 
 At room temperature ~ 50 ° C 
 2-5 minutes 
 1-2 months 

 0.3-0.5% of the accelerator 
 2 to 5 


 Five day-to-day management of the phosphating solution (with a ton of Bath) 

 1 due to normal production, the total acidity decreased, should complement plus DC # 287 bonderite, each adding 2 kg can increase the total acidity of a degree. 

 The free acid high, plus 0.5 kg neutralizer can be reduced to a degree of free acidity. 

 3 control of accelerator concentration, not more, adding method a few times appropriate, usually supplemented with 0.5 kg of the accelerator allows concentration increased by 1 degree.