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Mechanical Finishing Clinic: Blasting Media That Reduce or Eliminate Ferrous Surface Contamination
Q. We are blasting our stainless parts in a blast cabinet with a finer steel shot. We are concerned about ferrous contamination but need the impact the steel media produces for our parts. What media do you recommend?
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How To Get Smooth Liquid Coatings
Q. What could be the reasons I cannot seem to get my coating smooth enough for my application?
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How to Improve Liquid Corrosion Resistance
Q. How can we improve the desired corrosion resistance expected from our coating?
Read MoreLiquid Coatings Clinic: Correcting Liquid Adhesion Issues
Q. I cannot get the desired adhesion of my coating to my part. What should I look for to fix this problem?
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How to Stop Rust
Q. We make automated pay stations for parking lots, the machines that allow the customer to pay at the exit with a credit card or cash. We have had some problems with rust breaking out of the seams at the base and around the door panels that provide access to the interior of the machine. The machine works fine but customers are not happy with visible rust. We have tried to apply more coating but it will not penetrate the tight creases in these areas. We also have rust on the edges of the door frame and the door. What can we do to avoid this problem?
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Corrosion-Sensitive Environment
Q. I have some fencing around my swimming pool that has corroded badly over the years. It was made with steel and there is a lot of visible rust on the rails and vertical pickets. I am considering the options; have a professional painter come in and clean, repair and repaint the fence; or have the fence replaced with one better equipped to handle the harsh environment around the pool. What would you do if you were me?
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Powder Coating Clinic: Adhesion Problems on Chromated Zinc Plating
Q. We have had adhesion issues when powder coating over zinc-plated aluminum. The aluminum had been nickel-flashed and zinc-plated with a hex-free chromate to meet RoHS compliance. Do you have any suggestions as to why the powder will not adhere properly to this surface?
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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.
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Anodizing Clinic: Sealing with Distilled Water
Q. Can distilled water be substituted for deionized water? Our facility can create a distilled water heated bath fairly easily because we already produce distilled water for another process. A DI water bath would be much more expensive.
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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 the difference between the two options and which one do you think is more advantageous for paint adhesion?
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