[R-390] More chemicals from the dark side

[Roy Morgan]

On Feb 4, 2011, at 12:30 PM, rbethman wrote:
>
> The Karcher Corp. that makes pressure washers, ...
> When directly contacted, they said Simple Green was just fine.
...
>
> If it was so detrimental to aluminum, then why is it so highly
> recommended and used by General Aviation owners?

The Army published a prohibition against Simple Green in one of it's  
mechanics magazines quite some time ago.

Quoting:
"Never use an cleaning product on your aircraft that has not been  
approved by the Army. SIMPLE GREEN has not been approved and is not  
authorized for use as an aircraft wash.
   It is highly corrosive on aircraft aluminum.  It also makes high- 
strength aircraft alloys brittle. If your unit is using SIMPLE GREEN  
as an aircraft wash, STOP!"
from a publication called PS 573, AUG 00

I had not heard that General Aviation owners use it.

Roy



Roy Morgan
k1lky at earthlink.net
K1LKY Since 1958 - Keep 'em Glowing!