Larry Chesterfield
Anodizing Fundamentals
Question: I have just started my enterprise and couldn’t find any information on anodizing using a high start-up amperage versus a more slow and even increase of amperage within the first seconds of having the load in the tank.
Read MoreONGOING DISCUSSION OF DI WATER QUALITY
Question: In an article that you wrote in the Aluminum Anodizing Clinic regarding the quality of deionized water, you said that high-quality DI water is very important in the anodizing bath.
Read MoreDuplex Sealing With Nickel Acetate and Di Water
Question: In past Anodizing Clinics you have talked about duplex sealing using, first, a relatively concentrated (3–5% by weight) nickel acetate bath followed by sealing in deionized water as a good way to seal dyed anodic coatings.
Read MoreOxalic Acid Anodizing—the Basics
Question: What are the general processing conditions for oxalic acid anodizing?
Read MoreColor Uniformity
Question: We manufacture flag poles, some of which get anodized clear and bronze.
Read MoreProcessing Conditions for Anodized and Black Dyed parts
Question: I am curious to know if there is any information on light-fastness of black dyed hardcoat vs. the concentration, time and/or temperature of the nickel acetate seal.
Read MoreHardcoat Coating thickness Consistency and Uniformity
My question is, is it possible for the parts to be anodized to more precision than 0.0004–0.0008 inches? What is the Martin process, and who does it?
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Current Density Revisited
Question: Anodizers constantly raise the question of anodizing (sulfuric acid) by current density vs. voltage.
Read MoreWelded Aluminum Railing
Question: We fabricate railings (hand rails) that are primarily steel.
Read MoreSolving The Air Pocket Problem
Question: We are trying to anodize a round part about 12-inch diameter with deep pockets in about 20 sections like a turbine fin.
Read More“Chasing” The Finish
We are thinking about anodizing and before we get any further into that we would like your opinion about that type of finish on this product. Is it practical to do this? What are some of the things we should be aware of as we look for an anodizer?
Read MoreRough, Uneven Surface After Stripping
Question: Sometimes after using the caustic etch to strip the anodic coating off parts that are being reworked, we have noticed blotchy areas on the parts.
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