Anodizing Troubleshooting & Quality Control
Exploring the: Anodizing Troubleshooting & Quality Control Zone
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How to Carefully Maintain Your Alkaline Etching Bath
Q. What should be the maximum aluminum content in an alkaline etching bath to avoid galvanized appearance (spangling) when preparing 6063 T6 extrusions for Type II anodizing?
Water Quality in the Anodizing Process
Q. I would like to know more about the physical and chemical parameters that are used to evaluate the quality of water used in the anodizing process.
Anodizing Clinic: Painting Parts After Anodizing; Seal, or No Seal?
Q. In conversations with our anodizer on the best way to seal parts for adhesion prior to painting, he referred to a choice of either a final hot water immersion at around 120°F with no seal or a hot water seal at a much higher temperature. What is ...
Anodizing Clinic: Measuring Color of Coatings with a Colorimeter
Q. Recently, a company asked us to match its samples so we could do work for them. According to our method, we matched the samples, but they were rejected when they were sent to the company. We were told the samples were out of tolerance. We discove...
Anodizing Clinic: Anodic Coating Blistering on 7075 Alloy
Q. We have recently run into a surface condition when hard anodizing 7075 machined forgings. It seems to be present primarily on the end of the part, even down into the hole. Both of these areas are machined. The condition does not appear to be evid...
Anodizing: Corrosion on Hardcoat Anodized 7000 Series Forging
Q. I sent you photos of two parts that are alloy 7050 forgings. On these parts there are spots that appeared as a result of Type III (hardcoat) anodizing that were not present before anodizing. They look like corrosion of some sort, but the corrosio...
Anodizing: Black Dyed Parts Require Excellent Lightfastness
Q. How long does an 8-rated dye last?
Anodizing: Black, Pitted Areas on Anodized Parts
Q. What are the black pits on my parts? How is this happening?
Anodizing Clinic: Technical References for Anodizing
Q. Are there any books or other resources that you could recommend for me to read and keep on hand as references?
Anodizing: Stripping Type III (Hard) Anodic Coatings
Q. Is it possible to strip hard coat type III anodized coatings?