Which Coating is Suitable for -50 to +50 Degree Temperature?

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Anonymous Poster	Which Coating is Suitable for -50 to +50 Degree Temperature? 08/16/2010 3:19 AM
	Hello folks, Which coating technology is suitable for part if operating temperature varies from -50 to + 50 degree Cecilius? ie teflon coating or any other process... Please help...
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 3:30 AM
	Oh, let's see: Paint Epoxy resin PTFE Galvanising Electroplating bitumen waxes "Cling Film" (other wrappings suitable for food use are available) sugar ~~chocolate dipping~~ oh no, only good to +35degC egg white lubricating oil Densotape Duct tape etc., etc..... __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#2 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 3:32 AM
	What are you coating and why are you coating it?
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Anonymous Poster	#3 In reply to #2 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 3:39 AM
	0.5mm steel "C" Channel for space application...
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#4 In reply to #3 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 3:46 AM
	OK, it's steel. Why are you coating it? Electrical insulation? Thermal control? Or?
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Anonymous Poster	#5 In reply to #4 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 4:17 AM
	Sir, It is for Thermal protection..
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#6 In reply to #5 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 4:29 AM
	Is the "thing" exposed directly to solar radiation? Or is electrical heat dissipation the goal? Is it inside another package? Are there optics or mechanical contacts in this package? In other words, is outgassing and possible condensation of outgassing products on the spacecraft surfaces a consideration? This is starting to sound like 20 questions. What is your goal? Why did you ask the question?
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Anonymous Poster	#7 In reply to #6 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 4:54 AM
	It is exposed directly to solar radiation n' there is mech and optics contacs.
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#8 In reply to #7 Re: Which coating is suitable for -50 to +50 dergee temp? 08/16/2010 8:49 AM
	Is there anything else the forum needs to know to be able to advise? Rather than drip-feeding the post, it would save a lot of effort if all the pertinent information were posted at once! __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#9 Re: Which Coating is Suitable for -50 to +50 Degree Temperature? 08/16/2010 9:14 AM
	The last time I did this I used a black urethane thermal control paint over an acid wash primer. I'd suggest you consult : Outgassing Data for Selecting Spacecraft Materials System or ASTM-E-595. Good luck.
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BruceFlorida Guru Join Date: Jul 2008 Posts: 1688 Good Answers: 145	#10 Re: Which Coating is Suitable for -50 to +50 Degree Temperature? 08/16/2010 12:39 PM
	Don't spacecraft have materials requirements imposed on them that are a little tougher than "suggested by a CR4 poster"? Is this "real" or "school"? __________________ Few things limit our potential as much as knowing answers and setting aside questions.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#11 In reply to #10 Re: Which Coating is Suitable for -50 to +50 Degree Temperature? 08/16/2010 1:14 PM
	Bruce, The requirements for materials for spacecraft applications are well know to many. Anyone who takes the word of a total stranger on somethng of this nature is, well, looking for trouble. The two documents to which I referred are useful tools for selection of materials, but there are many more factors to be considered. Thanks, CR4 poster.
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Anonymous Poster (3); BruceFlorida (1); lyn (5); PWSlack (2)

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