How to control roughness of coatings
09-03-2008, 01:40 PM,
#1
How to control roughness of coatings
Hi,friends!
I want to control roughness of coatings when I spray it!
Can I achieve the target? What parameters I should pay attention to?

Thank you!
Reply
09-03-2008, 02:01 PM,
#2
RE: How to control roughness of coatings
Which process are you spraying with (flame, arc, plasma, HVOF or other).

What materials?

Are you looking to make a coating more rough or smoother?

Do you have any roughness figures in mind?

Maybe an explanation of the potential application may help.

Sorry for so many questions but it will help all respondents to give you the most suitable reply.
Stuart Milton
Metallisation Ltd
https://www.metallisation.com
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09-03-2008, 03:57 PM,
#3
RE: How to control roughness of coatings
Hi Zhangqiuping

Sign0016 to the Surface Engineering Forum.

As Stuart says we need a bit more information so we can answer without writing a whole book on the subject. Smile
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09-04-2008, 07:57 AM,
#4
RE: How to control roughness of coatings
Thank you for your advices!
I spray with air compressor and spray gun!
I wish I can control roughness of coatings during the process I operate with hand!
The material is composed of fluorocarbon varnish and pigment!
I spray coating on aluminium in order to study the connection between the roughness and the optical performance!
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09-04-2008, 11:13 PM,
#5
RE: How to control roughness of coatings
Hi Zhangqiuping

I think we wrongly assumed this was a thermal spray question Happy0193

Not really my area of expertise, but I think the following factors will be important:

* composition and nature of your spray material
* viscosity
* air pressure/flow rate
* nozzle design
* Spray/stand off distance
* substrate/coating temperature
* substrate roughness
* post spraying baking/curing
Reply
09-05-2008, 10:42 AM,
#6
RE: How to control roughness of coatings
Thanks!
I will try it according to your suggestion!
Reply




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