Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
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How I can obtain a good cleaning in Aluminum Alloy 355-T71 Casting-Sand AMS 4214
We have a problems with the cleaning in some parts with this material Aluminum Alloy 355-T71 Casting-Sand AMS 4214 , somebody know a good chemical that we can use by to obtain a good cleaning and post to make a good anodizing
thanks a lot
special process - Empalme, Sonora, Mexico
August 7, 2009
August 11, 2009
1. Clean in any alkali that does not contain silicate and does not etch, even Grocery Store Dawn Detergent
2. Cold Water rinse
DO NOT ETCH IN ALKALI
3. 100% Nitric Acid plus 2 pounds per gallon ammonium bifluoride, about 20 to 30 seconds until the metal turns frothy white all over
4 & 5, two quick rinses, do not stop to look
6. Anodize.
This process is detailed in the newly released
Aluminio El Como.
Robert H Probert
Robert H Probert Technical Services
Garner, North Carolina
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