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CED coating process questions

July 18, 2008

Q. Sir please can you tell me the standard process for CED coating.

keshav nandamuri
- chennai-Tamilnadu, India

July 19, 2008

A. In simple steps: Pre treatment (iron phosphate, zinc phosphate or newer nano coatings), E-coat and Bake. Not a rule but generally online de-rusting is not present in the pre treatment line. Depending upon the component and the performance expected Passivation / Sealer dip may or may not be present. A typical line could look like - Degrease, Degrease, WR, WR, Activation / Surface conditioning, Phosphating, WR, DI WR, DI WR, E-coat, Permeate Rinse, Permeate Rinse, DI WR and then bake. I hope this answers your question.

Gurvin Singh
Coatec India
supporting advertiser
Mohali, Punjab, India

October 17, 2012

Q. Sir, can you tell me why "Activation" process is needed in CED coating?

Paresh Patil
- India

October 17, 2012

Q. Hi All,
We currently subcontract our panels for cataphoresis. Recently we have had rejects from our customer with a "marbling/running effect" down to face of the parts. Our supplier is adamant that it is the material which is at fault, but we have checked the material and can find no issue with this whatsoever. Has anybody seen/heard this issue before and found the root cause?

Material is 1 mm thick stainless steel.

Peter Baird
- Scotland

December 28, 2012

A. If the raw uncoated steel does not have the same grain pattern as you are seeing over the painted surface, then the paint job or phosphating pretreatment is not good enough.

Khozem Vahaanwala
Saify Ind supporting advertiser
Bangalore, Karnataka, India

saify logo

November 21, 2014

Q. We are Job Coaters based in Pune, India. One of our customers wants CED coating on Brass components. What is the pretreatment recommended for this?


Sriram Vangal
- Pune, Maharashtra, India

Permeate ooze-out in CED coating

November 30, 2015

Q. Hello my dears ... I have working on CED system for car bodies. How to reduce the permeate ooze-out (cathodic electrodeposition) during electro deposition? Please help me.

Munusamy Perumal
tamilnadu, kanchipuram, India

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