CoatingsPro Magazine

JUL 2013

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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Notes From the BLoG Cadmium, Aboveground PVC, and Wet Adhesion Tests By MP Forum Editor's Note: Looking for "in the field" information about the latest coating application techniques? We invite you to join the discussion. The following are excerpts from the NACE Corrosion Network's (NCN) and NACE Coatings Network's email-based discussion groups for corrosion professionals, with more than 1,000 participants. The following excerpts have been selected for their potential interest to CoatingsPro readers. They have been edited for clarity and length. Authors are kept anonymous for publication. Please be advised that the items are not peer-reviewed, and opinions and suggestions are entirely those of the inquirers and respondents. CoatingsPro and NACE do not guarantee the accuracy of the technical solutions discussed. You'll enjoy a variety of opinions in this practical information exchange forum. For information on how to subscribe to these free list servers, click on the "Community" link on the NACE Website: Cadmium in Paint? We have been refurbishing some old equipment that involves sandblasting to remove the coatings. We are noticing some significant levels of cadmium in our sandblast media. Could the cadmium have originated from the old paint that is on the equipment? Cadmium can sometimes be found in steel structures. I think it was used on bolts and nuts as well as a corrosion control device. I, too, have found cadmium in blast residue that was generated from barges. Cadmium is used sparingly as a pigment and drier (cadmium naphthenate) in coatings. It is relatively expensive and generally used only in specialty items such as artist paints Q: A: A: 18 CoatingsPro g July 2013 Numerous tests have been conducted that have concluded that UV exposure reduces the impact strength of PVC by approximately one third of its original value. (cadmium yellow). It is more often used in alloys that are electro-deposited in or hot-dip applied. It could be from the paint (some yellows are cadmium-based) or, if it's a galvanized surface, it could come from the zinc. Some zinc grades contain up to 0.1 percent cadmium. Ma ny cabi nets t hat a re for i nside u se have c ad m iu mplated hardware for their connections. A: A: Additionally, cadmium was routinely used to protec t elec t r ic a l pa r ts i n electrical and electronic equipment. T he s e a re p os sible s ou rc e s , but I don't know what type of cabinets you are cleaning. We encountered a tank project t h a t c ont a i ne d a ve r b a l l y reported cadmium level of 22,000 ppm in the paint! After some investigation, I was informed by a coating specialist that A:

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