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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: DIY cyro treatment? posted by gnugear on May 20, 2008 at 02:27:40:
Yes, some noticeably audible effects can be heard and they are rather permanent. Dry ice is about -100 degrees F and while probably not as effective at liquid nitrogen it will still give you a taste of cryogenics. I first used dry ice on certain products: RCA ends and other connectors, wall duplexes and such and liked what I heard. I then purchased a surplus lab freezer (-100 F) and used it with very good results.In speaking to an aircraft mechanic, he told me that landing gear axles need to be cryoed after a number of landing cycles. While here are no commercial cryogenic sites where I live ( except at the local university), I was curious as to where they had their work done. He informed me that they packed a large Igloo Styrofoam cooler with a layer of dry ice, placed the axles into the cooler and then covered the axles up with dry ice and then poured liquid nitrogen into the cooler. They would seal the lid with duct tape and allow the axles to come up to room temperature: roughly a week and the axles would have been treated.
Before purchasing the liquid nitrogen, I experimented with the cooler and dry ice. It works. It may not be as effective as a true cryogenic treatment, but it works. The key is a very slow cooling process, Don't open the cooler to check, just give your self the patience and let it sit. Styrofoam is used because if the pressure should build up from the solid to gaseous transformation, you won't get any potentially explosive pressures ( if you use the duct tape). Plus a friend who work sin the Biological labs at the local university told me that they use Styrofoam coolers all the time for liquid air transportation. A double nestled cooler system seems to work just as well as the much more expensive Dewar flasks, I was informed, although perhaps not for prolonged periods of storage.
Stu
PS: What Enophile says below can be very true. I believe the key is progressive temperature changes, both in cooling and in removal.
I have frozen some plastics with little negative effects, but also have been careful in the changing temperature gradients.
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Follow Ups
- RE: DIY cyro - unclestu52 05/20/0812:34:13 05/20/08 (0)
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