'Simple green is also supposedly corrosive to aluminum. Source: Either Aviation Consumer or Light Plane Maintenance.
Bob
[Non-text portions of this message have been removed]'
Re: Belly Cleaning
Re: Belly Cleaning
'The warning is from the airforce that did an "accelerated" test by hanging unpainted aluminum in a vat of heated to 100 degrees of Simple Green for 168 hours. After all that, the sample was scrubbed clean with a nylon bristle brush. Found mild corrosion by weighing.
http://www.avweb.com/other/usaf0020b1.pdf is a copy of the report.
If you look at the report, there are several serious flaws. One was they used tap water to dilute to less than the specified dilution. The table is misleading as they weight the test coupon in grams but reported the loss due to corrosion and abrasion in milligrams. Incidentally they did not scrub before they weighed the samples.
If you don't dilute and scrub the hell out of your plane, don't rinse and place your plane in an oven at 100 degrees while it is immersed in liquid simple green then you will have problems if the aluminum is unpainted. Give me a break.
I'll bet that if you immersed aluminum in 100 degree heated tap water for a week, then scrubbed to "clean" it; your sample would show weight loss also.
One reason aluminum fairs so well in the non-corrosive department is the bare metal is never exposed to the elements. There is always a layer of corrosion (aluminum oxide) on the surface that once formed, protects it from further oxidation. This thin film fortunately reforms when damaged. That is why a polished prop or plane must continually be re-polished.
http://www.avweb.com/other/usaf0020b1.pdf is a copy of the report.
If you look at the report, there are several serious flaws. One was they used tap water to dilute to less than the specified dilution. The table is misleading as they weight the test coupon in grams but reported the loss due to corrosion and abrasion in milligrams. Incidentally they did not scrub before they weighed the samples.
If you don't dilute and scrub the hell out of your plane, don't rinse and place your plane in an oven at 100 degrees while it is immersed in liquid simple green then you will have problems if the aluminum is unpainted. Give me a break.
I'll bet that if you immersed aluminum in 100 degree heated tap water for a week, then scrubbed to "clean" it; your sample would show weight loss also.
One reason aluminum fairs so well in the non-corrosive department is the bare metal is never exposed to the elements. There is always a layer of corrosion (aluminum oxide) on the surface that once formed, protects it from further oxidation. This thin film fortunately reforms when damaged. That is why a polished prop or plane must continually be re-polished.
'----- Original Message -----
From: Bob Webster
To: fairchildclub@yahoogroups.com
Sent: Sunday, December 15, 2002 10:46 AM
Subject: [fairchildclub] Belly Cleaning
Simple green is also supposedly corrosive to aluminum. Source: Either Aviation Consumer or Light Plane Maintenance.
Bob
[Non-text portions of this message have been removed]
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[Non-text portions of this message have been removed]
-
WALTER ALBERT
- Posts: 88
- Joined: Thu Feb 15, 2001 5:31 pm
Re: Belly Cleaning
'elbow grease is quite good...
'----- Original Message -----
From: Bob Webster
To:
Sent: Sunday, December 15, 2002 11:46 AM
Subject: [fairchildclub] Belly Cleaning
> Simple green is also supposedly corrosive to aluminum. Source: Either
Aviation Consumer or Light Plane Maintenance.
>
> Bob
>
>
> [Non-text portions of this message have been removed]
>
>
> To unsubscribe from this group, send an email to:
> fairchildclub-unsubscribe@yahoogroups.com
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>