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Detailed operational parameters for 7-tank phosphating process [India] 

July 19, 2008

DEAR SIR,

Please give me the details of each seven tank i.e. types of solution, its pH, its temperature etc. This information to help me to installation of seven tank in my small scale paint aplication unit.

Thanks.

Sujitkumar Prajapati
Paint shop - Baroda, Gujarat, India

Hi, Sujitkumar. Most people installing a phosphatization line would go to a specialty supplier for a co-ordinated cleaner, zinc phosphate, and final dip. We would advise you to strongly consider that route as you would not only receive detailed operational instructions, but the quality of your product would be better, the vendor would be keeping you abreast of changing requirements like RoHS compliance, and the smaller the shop the less practical it is to formulate your own chemistry.

But if you will be formulating your own processes and trying to optimize them, I think you will find the kind of information you seek in Samuel Spring's "Preparation of Metal for Painting " or "Phosphating of Metals" by Rausch & Rauch. Good luck.

Regards,

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

SIR
I HAVE FORMULATED 3 IN 1 CHEMICAL FOR PRE TREATMENT CHEMICAL BUT MY CUSTOMER IS INTERESTED IN 7 TANK PROCESS AS MY 3 IN 1 HAS PROBLEM OF GETTING REDDER TONE AFTER APPLICATION AS SURFACE GETS ACCTIVATED.KINDLY GUIDE IN ABOVE LINE OR LET ME KNOW IF 7 TANK SYSTEM IS MORE APPLICABLE THAN 3 IN 1(DEGRESING DERUSTING & PHOSPHATE COATING)

DEVANG CHHAPAWALA
MANUFATURER - ANKLESHWAR, GUJARAT, INDIA