Gordon England Surface Engineering Forum



Re: T800 Coating Thickness limit by HVOF

Posted by Gordon England (62.252.0.12) on 15:04:11 26/01/06

In Reply to: T800 Coating Thickness limit by HVOF posted by Alex

Hi Alex
Up to about 0.5 mm thick should be safe. Up to 1 mm may be possible with care. The actual coating thickness limitation depends very much on the T800 powder grade, spraying parameters, thermal history of coating/substrate and geometry of substrate. Take care with some product literature as I have come across some rather overly generous thickness limitation claims which certainly can't be applied in practice.
Coating failure on flat surfaces commonly show edge lifting, while coatings on external diameters usually show cracking.
Regards Gordon


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