Ceramic flame powder coating result in Black colour
09-06-2008, 01:45 AM,
#1
Ceramic flame powder coating result in Black colour
Dear all,
Does anyone has any experience to spray ceramic flame powder coating by using Metco 5PII gun spray the results / powder coated to material is in Black Colour ??, we have used Titanium oxide powder but the colour is grey one, since my customer is a textile factory very fanatic with black colour result of sprayed ceramic powder, cause the original is black-coloured.
Thanks in advance.
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09-06-2008, 06:27 PM,
#2
RE: Ceramic flame powder coating result in Black colour
Hi iwan-sedaryawan

Titanium dioxide (titania) and various alumina/titania (13-50%) can produce black or blue/black coloured coatings (Metco 102, 110, 130, 131VF). Amazing considering titania powder is white and is often used as a white pigment in paints etc. Smile

The colour can be effected by your gun set-up and spraying procedure. Increasing numbers of poorly heated particles in the coating will make coating lighter and more grey/blue. Preheating substrate to 100-120*C and not allowing lower temperatures during spraying are important. Experiment with your speeds and feeds. To get and maintain good black colour can be a bit of an art Rolleyes Also sealing will improve appearance. Are you using the cross air jet accelerator unit on the 5P-II?
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09-07-2008, 03:00 AM,
#3
RE: Ceramic flame powder coating result in Black colour
(09-06-2008, 06:27 PM)Gordon Wrote: Hi iwan-sedaryawan

Titanium dioxide (titania) and various alumina/titania (13-50%) can produce black or blue/black coloured coatings (Metco 102, 110, 130, 131VF). Amazing considering titania powder is white and is often used as a white pigment in paints etc. Smile

The colour can be effected by your gun set-up and spraying procedure. Increasing numbers of poorly heated particles in the coating will make coating lighter and more grey/blue. Preheating substrate to 100-120*C and not allowing lower temperatures during spraying are important. Experiment with your speeds and feeds. To get and maintain good black colour can be a bit of an art Rolleyes Also sealing will improve appearance. Are you using the cross air jet accelerator unit on the 5P-II?
Hi Gordon,
Appreciated to your quick reply, will check to our operator for the air jet accelerator, how about chrome oxide effected to the colour ? can be achieve black coloured than Titania/Alumina ?
Thanks & Regards,
Iwan Sedaryawan - Website : https://www.ciptaagung.com
Happy0193
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09-07-2008, 12:30 PM,
#4
RE: Ceramic flame powder coating result in Black colour
Hi iwan-sedaryawan

Chromium oxide coatings tend to be more of a dark grey than black (depends on your definition of a black coating Happy0193 ). Note also that deposit efficiency through the 5P-II are very low (<20%). Chromium oxide/silica (136F) or chromium oxide/titania (111) may be better.

Best to experiment with spray technique and a few different powders and see which ones your customer prefers.
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09-08-2008, 01:55 AM,
#5
RE: Ceramic flame powder coating result in Black colour
Hi Gordon,
Okay, will do as per your suggestion above and hv a nice Monday......
Thanks & Regards,
Iwan Sedaryawan - Website : https://www.ciptaagung.com
Happy0193
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09-11-2008, 04:26 PM,
#6
RE: Ceramic flame powder coating result in Black colour
I agree that the spray parameter is very important to the color. I have never used a flame spray gun to burn ceramic only plasma guns. I produced a very black coating with Norton/St Gobain #108. I was also able to get a mostly black(some greyish) with a Chrome oxide powder from Stark. I cannot remember the powder ID off the top of my head but can find it if you like.-
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09-12-2008, 01:56 PM,
#7
RE: Ceramic flame powder coating result in Black colour
Appearance may also differ depending on post spraying treatments. Colour of as-sprayed coating may look quite different when sealed or finished ground/polished. I use to like looking at rolls/shafts with ground/polished coatings of this type, where the appearance was more like wood, showing light and dark "wood" grain patterns. Not a desired effect but pretty Happy0193 This is where various layers of differing qualities are exposed on the surface.
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