Electrolysis / painting

Anonymous-0

Well-known Member
I have read about the process from several places and have tried it on some parts and it has worked very wellfor me. One question that I have is : when you are done and all the rust is gone, you are left with the black coating on the part, do you have to remove every spec of the black stuff before painting ?
Some describe how to clean the part after electrolysis by scrubbing with brush and water , Scotchbrite pads, wire wheel etc... I found the wire wheel works good for me as it does come off pretty quick, but some parts I am doing are pitted real bad, and I am concerned that I may miss some of the black stuff.
So do I need the part completey stripped of all residue ??? or ??
Thanks...Alan
 
Stop!!!
The Black stuff is what you want!!! that is the Iron deposits youv'e been waiting for when doing electrolysis. Dry it & prime it !
 
Wipe the surface with a damp white rag, if the rag turns dark, the residue is carbon.

Electroplaters refer to it as "smut", the carbon left behind when iron is dissolved from steel via electrocleaning or over pickling with acid.

It"s presence will affect paint adhesion.

A citric acid based cleaner will remove the black film from hard to reach surfces without causing flash rusting in most applications. Be sure to rinse throroughly with water and apply a solvent cleaner over the treated metal to displace any water or moisture.
 
Its been my experience you need to clean that off. It is iron but its not bonded to the service of the object you cleaned. If you don"t clean it off then the paint won"t bond to solid metal but rather to the iron laying on the surface.
 

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