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topic 21623

High heat resistance powder coating

Current question and answers:

April 22, 2021

Q. I have read that the highest temperature that Powder Coating can endure generally is 550 °C. I have some parts that will take the direct heat off of a variety of heat sources including engines that operate between 600-800 °C. Do I have to skip the idea and move instead to ceramic coating? I have seen one that can take over 1000 °C in the UK.

Please let me know as soon as possible as I am in the midst of a project and need to make a decision soon.

Ray Stevens
- Monaco, MC
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April 2021

A. Hi Ray. Read on and it sure looks like ceramic coating it should be :-)

Luck & Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
Aloha -- an idea worth spreading
finishing.com - Pine Beach, New Jersey
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April 29, 2021

The term "Powdercoating" describes a means of application of a coating rather than the material coated onto a substrate. Many different polymers can be used to powder-coat things, mostly metals but also some timbers.
The coating is usually heat cured, typically at 200 °C or thereabouts. The coating is then not a heat proof coating, and one of the methods of removal of it, it to "burn" it off in a pyrolysis oven, often at about 450 °C. At this temp, most powder applied coatings turn to dust, and fall off.
So if you want to use your coated item at 600 °C as mentioned, powder applied coatings are not the right route.

geoff_crowley
Geoff Crowley
Crithwood Ltd.
supporting advertiser
Westfield, Scotland, UK
crithwood logo

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Previous closely related Q&A's starting in:

2003

Q. I am looking for a high heat resistant powder coating, preferably around 1300 °F (700 °C). I have been told that there is no such powder coating available, is this true?

Allen Burbank
Powder Coatings - Raleigh, North Carolina, U.S.
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2003

A. Yes, this is true. Up to 400 - 450 °C is possible with thermosetting powders. The only possibility would be to use enamel powder coating.

Good luck,

Remmelt Bosklopper
Remmelt Bosklopper
- Enschede, The Netherlands
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2003

A. Hi Allen. I think you would need to flame spray a porcelain/ceramic coating for that kind of temperature resistance.

Regards,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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affil. link
"High Temperature Coatings"
from Abe Books

or

2006

Q. To whom it may concern,

I am a student of the Faculty of Technology and Metallurgy, Belgrade (Serbia), Department of Organic Chemical Technology and Polymer Engineering.
I have to do seminar work about heat resistant coating, up to 600 °C. I would appreciate it if you could give me some information about it.

Your faithfully,

Nikola Kocic
- Belgrade, Serbia
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2006

A. Hi Nikola. Some high temperature paints might do if this is maximum and short term. But ceramic coatings become more and more appropriate as temperatures get higher because they don't contain plastics/solvents/organics. Good luck.

Regards,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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To minimize search efforts and to offer multiple viewpoints, we combined previously separate threads onto this page. Please forgive any resultant repetition, failures of chronological order, or what may look like readers disrespecting previous responses -- those other responses may not have been on the page at the time :-)



High temperature PVC for Powder Coating

November 8, 2012

Q. Hello all,

I'm looking for a high temperature PVC powder that can withstand short term (1 min) temperatures of 1000 °F, everything I've come across will break down at short term temps over 500 °F. Has anyone ever seen anything like this?

Thanks

Andrew Liptak
- Agawam, Massachusetts, USA
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November 12, 2012

A. Hi Andrew.

Why PVC instead of a higher temperature polymer?

Regards,

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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simultaneous First of two simultaneous responses -- November 14, 2012

A. Silicone powder coatings withstand temperatures up to 1200 °F for a short while.

Anna Telk
- Berlin, Germany
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Second of two simultaneous responses -- November 14, 2012

A. PVC will not withstand 1000 degrees!
Choose another option.
Hope this helps.
Bill

William Doherty
Trainer - Salamander Bay, Australia
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November 27, 2012

thumbs up signThanks for the input so far. We currently use a polymer adhesive but it would be more economically beneficial for us to use a powder coating, rather than the 2 layer primer/polymer system we use now. I have seen TPO powders that work at these temperatures which is why I thought there may be a PVC solution out there.
I will definitely look into the silicone coatings.

Andrew Liptak
- Agawam, Massachusetts, USA [returning]
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December 8, 2012

A. If you want high temperature for a short length of time you'll need a silicone polyester coating. This is what is used on things like stove pipe.

Ronald Zeeman
Coil coating - Brampton, Ontario, Canada
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----
Ed. note: Readers of this thread may be interested in topic 22541, "Ceramic Coating vs. Powder Coating vs. Ceramic-powder Coating".

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

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