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Cleaning before coating

Cleaning before coating

Cleaning before coating

(OP)
Hello!

Can anybody give me some advice on cleaning?
In case of some extremely oily, greasy or otherwise soiled engine parts with rough surfaces, my coatings keep peeling of after deposition.
I have tried cleaning with benzine, an industrial washing machine, ultrasonic baths

and different commercial purifiers.

Do I need some special etching process?
What kind of process do you recommend? What parameters? Which cleaning agents might be best?

Thanks for any help!

RE: Cleaning before coating

What are the parts made from?

Benzene, if you are talking about the chemical,  is a poor choice for cleaning as it is potent carcinogen.

RE: Cleaning before coating

(OP)
E.g. we have 16MnCrS5 parts. It seems to be a problem concerning embedded oil in the surface because of the surface grounding process.
Thus I started a similar thread in the Materials Engineers / Paint/Coating engineering forum.

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