Info about Spray Phosphating Systems 

Letter 10001

We have Powder coating plants. Also we use metal pretreating line for this (rust removing). But the current method is not very efficient for us, because it is dipping method. Therefore we want to know about spray method.

INDIKA P
TRADING - SRI LANKA

Hi, Indika. Yes, spray systems are usually considered more efficient because the mechanical energy of the spraying makes for faster processing and sometimes better consistency.

There are a number of manufacturers of such phosphatizing systems, and these days you can get all-plastic construction if you wish. They essentially consist of nozzles for spraying the solution, inside of tunnels which collect the overspray and direct it back to the reservoir for pumping through the nozzles once again.

Good books about phosphating are Samuel Spring's "Preparation of Metal for Painting" [link is to info about the book at Amazon] and "Phosphating of Metals" [link is to info about the book at Amazon] by Werner Rausch. Good luck!

Regards,

Ted Mooney, P.E.  finishing.com Brick, New Jersey