plating, anodizing, & finishing Q&As since 1989
Type of coating that may be used to REPAIR ground Mil-C5541surface of an Aluminum part
We have a part that was Mil-C-5541 treated and unfortunately a part of it has been grounded /sanded so that Aluminum is now exposed. Is there any process or other coating that one may recommend that would be in lieu of 5541...short of using a new part or re-treating it again to 5541..?
- San Diego, California, USA
First of three simultaneous responses -- 2006
Your firm used to have a "touch up" in the standard practice manual.James Watts
- Navarre, Florida
Second of three simultaneous responses -- 2006
Mil-C-5541 allows swabbing on of chemical, there are directions available from the manufacturers of the chemicals and in archived letters on this site describing how that can be done. While some of the chemicals are hazardous, standard care and caution makes it a relatively safe and easy process.
Accurate Anodizing Inc.
Compton, California, USA
Third of three simultaneous responses -- 2006
Abrade the bare surface with ScotchBrite [adv: item on eBay & Amazon] ; using Q-tip [affil link], dip in a solution of double strength chromate, then wipe back and forth until the spot attains the same color as the surrounding dipped chromate, then wipe off with a damp tissue.
Robert H Probert
Robert H Probert Technical Services
Garner, North Carolina
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