Larry Chesterfield
That Sticky Feeling
Question: We operate a Type III (hard anodize) bath which operates at the following conditions: 15% sulfuric plus 1% oxalic, dissolved aluminum less than 7.5 g/l, 40F, aluminum cathodes, air agitation, solution is filtered.
Read More"Bleach Test" Feedback
I was surprised at the interest in the so-called "Bleach Test" that I wrote about in the February issue.
Read MoreChromate Conversion Coatings
Question It seems to be a widely known fact that you are not supposed to expose chromate conversion coating on aluminum to temperatures greater than 160F because the coating will deteriorate.
Read More"Bleach Test" for Quality of Anodic Seal
Question: A customer of ours has asked us to conduct a bleach test on its parts that have been sulfuric acid anodized, dyed and sealed.
Read MoreSmut and Desmutting
Question: I am new to this industry and have heard about smut and desmutting operations.
Read MorePretreatment of Aluminum for Powder Coating
Question: What is the best way of treating aluminum before powder coating?
Read MoreVacuum Deposition of Selenium
Question: We vacuum deposit selenium on 3003 and 6063 aluminum alloy drums for copy machines.
Read MoreDual Purpose Anodizing Bath
Question: When using a sulfuric acid-oxalic acid electrolyte for Type III hardcoat, is it possible to raise the temperature in order to do Type II anodizing in the same tank?
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