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Matt Dralle Email List Administrator
Submitted By: messydeer@yahoo.com Email List: Zenith-List Name: Dan Morehouse
Date: Feb 11 2006
Subject: 'water stain' corrosion on sheets Description: I left ~20 sheets of .025 and .032 outside for 8 months. Pics of damage and removal.
Blendex_and_Alumiprep.jpg lower left (below angle grinder): after 1:2 diluted Alumiprep, 6-7' dwell time, moderate hand scrubbing (~50#) with green scotchbrite; lower right: after Blendex (fine grade) mounted on angle grinder, ~20# pressure; upper right: untreated. Blendex_only.jpg closeup high contrast of remaining 'shadow' of stain after Blendex; similar to lower right area of other pic; this 'shadow' was completely ablated with ~40-60# pressure on the angle grinder; staying too long in one place is a concern here corroded_.025_closeup_1.jpg from ~2' away corroded_.025_closeup_2_(before).jpg closeup of boxed area in closeup 1; narrowest area of stain ~3/8" corroded_.025_closeup_3_(after).jpg after aggressive hand scrubbing (~75#?) with naphtha and green scotchbrite Corroded_.025_full_sheet.jpg 4x12 sheet with 'water stain'4x12 sheet with 'water stain'
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