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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
(Ted is available for instant or longterm help)

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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