Tag, You’re It Q: Hello Joe: I enjoyed reading your Technology Interchange article on polyester coatings. I am in the pet tag industry and sear...

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Not Just White. VERY White Q. Dear Joe: My problem is that a customer wants a white powder paint (very white), and all those that I have ap...

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Shelf Life Q. Hi Joe: I’m selling powder coating in South America. So, I have many questions in regard to powder coatings. But the most importa...

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Dead Matte Walking Q. Hi Joe, My team and I are currently trying to make a powder that is very low in gloss when measured at the 60-degree and 8...

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Q. Joe, I have a question concerning the relationship between pretreatment chemicals (currently using a zirconium-based pretreatment in a six-stage system with an alkaline cleaner in stage one) and powder coat thickness. Can the condition of the bath play a role in how thick the dry film thickness is on a part?

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Blasted Cast Iron Q: Joe, I’ve contacted you before so maybe you can help me again. I run a small to medium sized powder coating...

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Agonizing Reprise Q: Good Morning Joe, I just read “Agonizing Over Anodizing” in the September/October issue of Powder Coated Tough and I...

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Joe Powder is our technical editor, Kevin Biller. Please send your questions and comments to Joe Powder at askjoepowder@yahoo.com

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Good Morning, Joe,
I read your section in the Powder Coated Tough magazine and appreciate your knowledge and expertise. I have a couple questions about super-durables. I’ve talked with many of the leading suppliers of powder coatings and get the same answer from each one on this question.

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Q: Hey Joe,
I am looking at a report that a major company just sent in. The steel parts are showing signs of rust after 24 hours and visible signs of rust after 48 hours in a 5% salt fog solution.

Somewhat new to this world of powder coating – how is this possible? Some holes and slots that have been punched out I can somewhat understand. But when I see aluminum wheels and outdoor items holding up season after season I would have thought the powder coating would hold up longer?

Is there a method of correlation between hours in a salt chamber and what this means to user conditions?
Thanks,
John D

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