Wetting of galinstan

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Anonymous Poster	Wetting of galinstan 12/11/2007 4:15 AM
	Gallium Indium Tin eutectic (other name: galinstan)wets glass. How to avoid this wetting, so that the glass remains clear?
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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: Wetting of galinstan 12/11/2007 5:34 AM
	Substitute a different material with a different surface tension. Mercury, for instance? __________________ "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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jacquesmf1 Participant Join Date: Nov 2007 Posts: 3	#2 In reply to #1 Re: Wetting of galinstan 12/11/2007 2:51 PM
	Substitute a different material with a different surface tension. Mercury, for instance? No, definitely no !!! : Using mercury instead of galinstan is NOT the good idea: on the contrary, as mercury is toxic (and particularly its organic compounds: cf Minemata, Japan..), the challenge is to replace mercury by galinstan...
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gigaconcept.com Guru Join Date: May 2006 Location: Montreal, Canada Posts: 632 Good Answers: 11	#3 Re: Wetting of galinstan 12/11/2007 11:40 PM
	A vapour deposited coating on the glass may help. I am guessing you are making thermometers or manometers and don't want to use plastic tubes. Parylene coatings are quite tin and will go inside small cavities. __________________ ''What the hell has my a** got to do with magic?" Don Quixote
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jacquesmf1 Participant Join Date: Nov 2007 Posts: 3	#5 In reply to #3 Re: Wetting of galinstan 12/12/2007 3:02 AM
	You are right !!! I am interested in manometers. So, I have to investigate in coatings. Thanks.
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Anonymous Poster	#7 In reply to #3 Re: Wetting of galinstan 03/17/2008 4:13 PM
	Just coat the glass tube with Galium oxide. (this is used in thermometers)
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vermin Guru Join Date: Jul 2006 Location: Silicon Valley Posts: 5356 Good Answers: 50	#4 Re: Wetting of galinstan 12/12/2007 1:54 AM
	Use a little very low viscosity oil... Like ethyl alcohol. __________________ "Perplexity is the beginning of dementia" - Professor Coriolus
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jacquesmf1 Participant Join Date: Nov 2007 Posts: 3	#6 In reply to #4 Re: Wetting of galinstan 12/12/2007 3:06 AM
	Ethyl alcohol is not be the solution:I need a liquid with density over 2, and vapor pressure very very low (under 10 mbar...)
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Anonymous Poster (1); gigaconcept.com (1); jacquesmf1 (3); PWSlack (1); vermin (1)

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