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Can you help me understand the temperature limitation of APET? Specifically, why is it that APET-packaged foods can be heated in a microwave only, when CPET-packaged foods are heated in either a household bake oven or microwave? Does economics drive the growing preference for APET over CPET in...

You're welcome. Glad to help. For rust removal, there is always shot peen, grit blast, or other mechanical removal. Chemical cleaners are also available that can remove rust and form new, stable oxides in their place. William Gunnar Naschak http://www.IndustrialCoatingsWorld.com...

Hi. An epoxy or modified epoxy-phenolic coating will serve you well. Consider Heresite Protective Coatings: http://www.heresite.com. William Gunnar Naschak http://www.IndustrialCoatingsWorld.com http://www.nationalsurfacesolutions.com http://www.industrialcoatingsworld.com

Hello, Feldmann. Consider doping your coating (metal finish) with yttrium or an ytterbium-based rare-earth material. Higher band widths, less heat reflection should result. The industry of photonics may be a good place to learn. William Gunnar Naschak http://www.IndustrialCoatingsWorld.com...

Glad to help. It'd be interesting to know if those significant friction and wear advantages are measured, quantified. Or, maybe others from your industry have testimonials. William Gunnar Naschak http://www.IndustrialCoatingsWorld.com http://www.nationalsurfacesolutions.com...

Friction is a system-dependent parameter, a function of material, counter-face, hardness, temperature, load, surface finish, distance and rate of travel. If you (or the industry) have seen no wear or performance compromise, there's no sense in pursuing "the better mousetrap". Stick with what...

Hello. Sounds like you have yet to see "failure mode", yourself, using conventional surface treatments like hard chrome. Nevertheless, there may be some advantages. Specifically, in boundary lubrication (e.g. oil environments), PTFE can serve you well in overcoming static friction and periodic...

Hello. Sounds like you have yet to see "failure mode", yourself, using conventional surface treatments like hard chrome. Nevertheless, there may be some advantages. Specifically, in boundary lubrication (e.g. oil environments), PTFE can serve you well in overcoming static friction and...

Hi, Richard. Consider perfluoropolyether technology from Solvay. Here is their link: http://www.solvaysites.com/sites/solvayplastics/EN/specialty_polymers/Fluorinated_Fluids/Pages/Fluorolink_PFPE.aspx Best wishes. William Gunnar http://www.IndustrialCoatingsWorld.com...

Anyone successful in stripping chromium nitride coatings from carbide? No changes in surface finish are permissible. Nor are reductions in cobalt. William Gunnar http://www.IndustrialCoatingsWorld.com

Anyone successful in stripping chromium nitride coatings from carbide? No changes in surface finish are permissible. Nor are reductions in cobalt. William Gunnar http://www.IndustrialCoatingsWorld.com

Hello. My experience is coating-related. PFA, being melt-processable, monolithic, lends itself well to "joining" through heat. But, like other fluoropolymers, ETFE included, be sure to weld in a well ventilated area. In fact, DuPont will even recommend a self-contained breathing apparatus...

Great advice by unclesyd. Also, can you add a radius to that corner? Thermal spray adhesion, you've discovered, is poor on sharp edges. William Gunnar http://www.IndustrialCoatingsWorld.com http://www.industrialcoatingsworld.com

Great advice by all. Consider, too, weight gain by your film. This would require smaller test samples, and an analytical scale with capability to 0.0001 gram. Best wishes. William Gunnar http://www.IndustrialCoatingsWorld.com http://www.industrialcoatingsworld.com

Hi. The lubricating aluminum hard coatings originating from ALCOA with <a href="http://www.lukeeng.net/">Luke Engineering & Mfg.</a> would be ideal. They are experts in light metal processing. William Gunnar http://www.IndustrialCoatingsWorld.com http://www.industrialcoatingsworld.com

Hello, Jinhh. What functionality or physical characteristics do you require from the coating? William Gunnar http://www.IndustrialCoatingsWorld.com http://www.industrialcoatingsworld.com

Hi. If by pickling you mean passivate, this is done typically using nitric acid, or the more eco-friendly citric acid. Temperatures are slightly elevated; and both yield excellent results. Of course extensive post-rinsing is required, including de-ionized water, to ensure surface purity...

Hi. I don't know your mechanical or thermal requirements, but you can't go wrong with 3M's Scotchkote series. These epoxy-based coatings are impressive. I've used them, myself, both for electrical insulation and protection from corrosion. Best wishes. William Gunnar...

Hi. For surface fatigue, the problem may be in the diffusion layer. Alloyed steels can result in thicker carbides or nitrides in grain boundaries, which may initiate cracking. I wish I could be more helpful. But, right now, I wouldn't rule out: process, material, or geometry. William...

Hi. The copper in your cast bronze will oxidize (and dis-bond) at temperatures below typical heat cures of many epoxy- and phenolic-based paints known for their corrosion resistance. This makes paint adhesion difficult. Consider 3M ScotchKote 134...