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Ted Mooney, P.E. RET
Pine Beach, NJ

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Electro-phosphating on steel wire

Q. Hi,

I am trying to do electro phosphate coating (Zinc Phosphate coating) on high carbon steel wires. It will be a continuous in line process and not a batch process. The surface area of steel to be coated will be 500 to 600 Sq.cm. I need some inputs on the following points.
1. What type of anodes should I use and what should be the surface area ? (anode to cathode ratio)
2. What should be the current density to achieve 6 to 8 gm/sq.mtr coating ?

Please clarify.

Muralidharan R.
- Chennai, Tamil Nadu
March 30, 2012

A. Hi, Mualidharan.

Sorry, but I'm unfamiliar with electro-phosphating offhand, so I can't help. Hopefully another reader can.

Regards,

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
April 4, 2012

April 6, 2012

A. Electrochemical phosphating has been used to modify steel surface.

US patent 6346186 [ed. note: "Method for electrochemical phosphating of metal surfaces", www.freepatentsonline.com/6346186.html] describes about electrochemical phosphating of stainless steel.

Any metal finishing consultant will help you to establish the process for you.

T.S.N. Sankara Narayanan
- Chennai, Tamilnadu, India
(ed.note: The good doctor offers a fascinating blog, "Advancement in Science" )

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