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raymondj(at)frontiernet.n
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 Posted: Thu Apr 08, 2010 11:09 am Post subject: Chemical "nut busters" |
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William,
Elevated temperature will accelerate the rusting. Salt water, obviously.
Elevated O2 exposure.
For application of mixtures it would be interesting to see the
difference between 15 min. and 12-24 hr.
I'd like to see the wintergreen oil/diesel mixture added to the list.
Hope this is of use.
Raymond Julian
Kettle River, MN
do not archive.
William Greenley wrote:
[quote]
I have teach some advanced high school classes where the students are always
looking for interesting projects for science fairs. This research might be a
good fit. What thoughts does anyone have on how to "scientifically" within a
reasonable time frame get a bunch of comparably rusted bolts? Also, any
ideas on what application protocol for the "nut busters" would be most
useful?
Dr Greenley
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email(at)jaredyates.com
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| Posted: Thu Apr 08, 2010 11:43 am Post subject: Chemical "nut busters" |
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If you want to step up the educational content even more, you could promote the corrosion with a little electrolysis. That will also really speed the process up. Put a rusty piece of plain steel into a water bath with a little bit of sodium carbonate, and hook up the negative lead of a battery charger to the rusty metal. Put the positive lead on the head of the bolts, then submerge the nut end of the bolt (only that end) into the solution and turn on the power. Follow the general directions here:
http://jaredyates.com/pages/electrolysis/electrolysis.shtml
just be sure to substitute the negative and positive leads, since I wrote those instructions for rust removal, and you want to add rust. This all starts to enter the wonderful world of plating, which is a fantastic learning experience that includes chemistry and electricity and more. Look for a company called Caswell, since they make small home plating kits for all sorts of applications. They have a great plating manual that covers how to plate with various metals at home. I have found that learning about how all of this works has really transferred well to building planes too. It helps with understanding the why and how of things like alclad aluminum, cad plated hardware, gold plated electrical connections (or not) and more. This type of learning is what makes airplane home-building such a valuable source of education for understanding the world around us as a whole.
On Thu, Apr 8, 2010 at 3:02 PM, ray <raymondj(at)frontiernet.net (raymondj(at)frontiernet.net)> wrote:
[quote] --> AeroElectric-List message posted by: ray <raymondj(at)frontiernet.net (raymondj(at)frontiernet.net)>
William,
Elevated temperature will accelerate the rusting. Salt water, obviously. Elevated O2 exposure.
For application of mixtures it would be interesting to see the difference between 15 min. and 12-24 hr.
I'd like to see the wintergreen oil/diesel mixture added to the list.
Hope this is of use.
Raymond Julian
Kettle River, MN
do not archive.
William Greenley wrote:
[quote] --> AeroElectric-List message posted by: "William Greenley" <wgreenley(at)gmail.com (wgreenley(at)gmail.com)>
I have teach some advanced high school classes where the students are always
looking for interesting projects for science fairs. This research might be a
good fit. What thoughts does anyone have on how to "scientifically" within a
reasonable time frame get a bunch of comparably rusted bolts? Also, any
ideas on what application protocol for the "nut busters" would be most
useful?
Dr Greenley
--
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http://www.matronics.com/Navigator?AeroElectric-List |
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