Thermal Barrier |
10-22-2008, 07:53 PM
Post: #1
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Thermal Barrier
We require to coat mild steel bolts with a nonconductive/thermal barrier the thickness of coating requires to be thin enough for the threaded end of the bolt still to except a nut, temperature range -10 to plus 30 degrees, so quite a small range, and the coating requires to be anti corrosive, any surggestion as to materials and best process to appliy
please William Alexander | |||
10-22-2008, 08:43 PM
Post: #2
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RE: Thermal Barrier
(10-22-2008 07:53 PM)William Alexander Wrote: We require to coat mild steel bolts with a nonconductive/thermal barrier the thickness of coating requires to be thin enough for the threaded end of the bolt still to except a nut, temperature range -10 to plus 30 degrees, so quite a small range, and the coating requires to be anti corrosive, any surggestion as to materials and best process to appliy Hello, I suggest you to use Al2O3 (Metco 101NS, Metco 105NS.........) with the plasma spray process. Regards, Ion | |||
10-22-2008, 09:56 PM
Post: #3
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RE: Thermal Barrier
Hi William
![]() Not really sure what you are after here, may be you can fill us in with a few more details. I don't think a thermally sprayed ceramic coating or for that matter any other thermal barrier coating system will work on a thread/nut mating surfaces effectively. Just thinking aloud, assuming a panel separating hot side from cold side, fasteners in this case steel nut and bolt provide unwanted heat conduction path. Ideally I suppose, fastener could be made from more thermally restrictive materials like plastic or ceramic . Possibly just placing a insulating cap over nut and/or bolt end should be effective and relatively cheap solution (you are also not so restricted so much by the thickness of insulation). Coating bolt and possibly nut I think will be expensive and not very effective. Regards Gordon www.gordonengland.co.uk www.surfaceengineer.co.uk Photography Obsession | |||
10-23-2008, 10:07 AM
(This post was last modified: 10-23-2008 10:10 AM by William Alexander.)
Post: #4
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RE: Thermal Barrier
(10-22-2008 09:56 PM)Gordon Wrote: Hi William Thanks for your reply, I take your point as to the threaded section of the bolt, however would it be possable to coat the shaft of the bolt,and may be the threaded section whith a reletivly thin coating of non conductive/heat resistant material Thanks for your reply, I take your point as to the threaded section of the bolt, however would it be possable to coat the shaft of the bolt,and may be the threaded section whith a reletivly thin coating of non conductive/heat resistant material Sorry for the double entry, still learning (10-22-2008 08:43 PM)plasmajet1990 Wrote:(10-22-2008 07:53 PM)William Alexander Wrote: We require to coat mild steel bolts with a nonconductive/thermal barrier the thickness of coating requires to be thin enough for the threaded end of the bolt still to except a nut, temperature range -10 to plus 30 degrees, so quite a small range, and the coating requires to be anti corrosive, any surggestion as to materials and best process to appliy Thanks for your advice I will contact a supplier | |||
10-23-2008, 12:59 PM
Post: #5
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RE: Thermal Barrier
(10-22-2008 07:53 PM)William Alexander Wrote: We require to coat mild steel bolts with a nonconductive/thermal barrier the thickness of coating requires to be thin enough for the threaded end of the bolt still to except a nut, temperature range -10 to plus 30 degrees, so quite a small range, and the coating requires to be anti corrosive, any surggestion as to materials and best process to appliyProbably no answer in thermal spraying for your ask. ![]() | |||
10-23-2008, 06:07 PM
Post: #6
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RE: Thermal Barrier
Hi William
Quote:Thanks for your reply, I take your point as to the threaded section of the bolt, however would it be possable to coat the shaft of the bolt,and may be the threaded section whith a reletivly thin coating of non conductive/heat resistant materialTo be honest, I can't really see what you are trying to achieve and this makes it difficult to give sensible suggestions, though I understand if you can't give too much info away ![]() Yes, you could thermal spray or paint on slurry mix and bake a ceramic coating. But I would mask and not coat the threads where the nut goes. Plastic or resin coatings may also be an option, which would be a lot more conformable if coating the thread. Regards Gordon www.gordonengland.co.uk www.surfaceengineer.co.uk Photography Obsession | |||
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