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Powder coating removal process

adv.   null

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Q. I'm hoping you can answer my question. Our company is a custom metal fabricator and we have a customer's part that requires a blue powder coat finish. After the parts were completed, the customer decided that he wants a different shade of blue. My question is this: Are there any processes available that will remove the powder coating from this cold roll steel part.

Rip Nation
machine shop - Oklahoma City, Oklahoma


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A. Hi Rip,

Powder coatings can be removed with hot alkali solutions or with solvent-based products.

George Gorecki
- Naperville, Illinois


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Q. Hello,

George Gorecki, You have suggested " Powder coatings can be removed with hot alkali solutions or with solvent-based products ", but will you highlight followings :

1] The process 2] Whether any effect on surface finish, after the process is done, when the base material is Aluminum and MS ERW TUBES.

Madhav Sakhare
- Mumbai, Maharashtra, India


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A. Hi Madhav,

I don't understand your question/comment. Can you re-state?

George Gorecki
- Naperville, Illinois


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A. Mr. Nation,

Is the assumption everyone should make that you can't repaint these parts unless you remove the first coat of paint? Repainting powder is relatively easy if you have experienced operators. There are some powders that you can paint over without doing any surface prep, other powders you will have to lightly sand the surface for the second coat to adhere. Run some test panels before proceeding with this! If you have to remove the first coat because of tight tolerance issues, I'd go with someone that can do it with a fluidized, heated sand bed. When you use paint stripper, it can gunk up all of the threaded holes, and the cleanup can be a real mess. Burning it off is another suggestion that has it's drawbacks in removal of the ash and possibly changing the mechanical properties of the substrate. I've never used the hot alkali solutions, so I can't give an opinion.

Sheldon Taylor
   supply chain electronics
Wake Forest, North Carolina


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A. The removal of powdercoated paint can be done using a process called soda blasting. The process is environmentally safe and will clean the piece of all contaminants, including powdercoated paint, down to the substrate. There is NO DAMAGE to the piece being cleaned.

A.tilano "A.J." Molinar
- Rio Rancho, New Mexico, USA


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Q. Can you tell me what solvent can be used to remove Powder coating.

Debasish Nag
- Kolkata,West Bengal, India


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RFQ: Hello -

I would like to have motorcycle wheels that have been powder coated, stripped of the powder coat paint, so that they can then be polished.

I have tried chemical strippers available over the counter, such as jasco and airplane paint remover ... but the powder coating on these wheels is not touched by these chemicals.

In this thread, it is mentioned that hot alkali and/or soda blasting are effective methods to remove powder coated paint. Are there companies located in northern California, San Francisco Bay area, the offer these services?

Thanks,

Johndeleted
- cupertino, California usa
outdated

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March 19, 2009

A. Chemical option: Use Gasket Remover. Haven't tried it yet.

Sand Blasting is difficult on a good powder painting jobs and can leave a too-course surface if using a large aggregate. It will effect your final paint job if not properly prepped.

Tom Mahoney
sports - Dorrance, Kansas


May 9, 2009

A. I am commenting on what Tom from KS, had mentioned about possibly utilizing Gasket Remover to remove powder coating from parts, he had not tried it yet, however was contemplating it's use. Please review my comments prior to using Gasket Removers to remove powder coat.
My interest in this blog-article, describing the use of Gasket Remover for removing powder coating caught my interest, due to my own career. I have experience, formulating eco-friendly paint and powder coating removers for over 30-years.
Buyer Beware when handling and applying Gasket Removers for any application, including powder coating removal. What most people do not know without actually reviewing the Material Safety Data Sheets, Hazards Section, is that this Gasket Remover is made up primarily from a chlorinated solvent called DICHLOROMETHANE, which is suspected to cause cancer in animals as well as being toxic to your vital organs by breathing the volatile vapors during use. I believe these types of products also contain Hazardous Air Pollutants, which is not friendly to the atmosphere that we all breathe and share.
Past paint stripping technologies were based on this same chlorinated solvent, synonymously called Methylene Chloride. This is a chemical that I personally would stay away from utilizing to remove paint and powder coating, with all the safer alternatives available today.
There is good news, eco-friendly, Green type stripping solutions for stripping paint, varnish removers and to remove powder coating are available.

Best regards, Sam

Sam Miles
Kissimmee, Florida


December 3, 2012 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Planning to use gasket remover to strip powder coated handlebars for chrome plating. Will this cause any problems for chrome plating?

Brad de Leon
- Toronto, Ontario


March 30, 2013

Q. Can anyone tell me how to remove the powder coating from the copper tube? I had tried thinner, wire brush and sandpaper but nothing worked properly. Please suggest to me an effective method to remove the powder coating.

Parag Pemgirikar
- Pune, Maharashtra, India



March 26, 2014

Q. Hi everyone, I work on a paint line that uses powder coating for 90% of our product, when paint goes wrong we usually put them in a burn-off oven for 3 hours at 1200 degrees. That usually does the trick.
But lately we cannot keep up, the oven takes too long. I heard that there's a machine out there that uses hot sand to strip away the paint ... does anyone know what is it called? Or if that machine even exists?

Rafa

Rafael espino
- Hartford, Wisconsin


May 5, 2014

A. There is a hot sand machine that originally was developed in Europe. We do not use it at my company because it leaves sand particles in all over the place resulting in many rejects from the repaint process. We use a LARGE burn off oven, an alkaline process, and an acid process depending on the base material and special features.

Joel Cheek
- Fairburn, Georgia USA


May 6, 2014

A. I wonder if you are looking at the real problem?
Why is it necessary to strip so many rejects?
Is there a fundamental problem with your coating process?
There are certainly sand ovens and chemical means to remove coatings from various substrates.
Would it not be better to fix the real problem rather than accelerate reject repairs?
Let's hear more about what the reject rate is and the basis for rejection.
Regards,
Bill

William Doherty
Trainer - Newcastle NSW Australia

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