posted
I have an to fill an order for an industrial customer to replace signs in an pellet processing plant. The existing signs are of painted steel, and are about 10 years old. The steel has rusted badly, so I'll replace the steel with aluminum; as well the paint has failed badly, I don't know exactly the type of paint but I've been told it was an industrial enamel. The signs are located between and next to huge enclosed burners. The surface temperature of the existing signs (measured with a IR probe) is 110ºc (~235ºf). Does anone know of a film, preferably reflective, that will stand up to these extreme temperatures for long periods of time ??
-------------------- Mike O'Neill
It has yet to be proven that intelligence has any survival value. - Arthur C. Clarke
posted
Try your local hardware store.....we have specific paint for motors and cast-metal burners\stoves. They are designed specifically for high temps. I'm sure you would have similar there.
-------------------- Linda Seymour Bundaberg, Q.L.D Australia
"DARE!" Signage of Distinction Bundaberg freeloner2001@dingoblue.net.au Posts: 94 | From: Q.L.D Australia | Registered: Jan 2001
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Spent quite a bit of time yesterday with tech support for a number of manufacturers including 3m and arlon. Seems there isn't any sheeting out there that will stand up to those kinds of temperatures for any length of time. I had a couple of bites from some smaller distributors telling me how their film would stand up to Arizona sun and should easily handle the job, they all sorta faded when I asked if they would certify that in writing.
Looks like it's gonna be a Hi temp paint, (got one that is certified up to 1200ºF) it's used for stoves and chiminees.
I'm going to have to use steel as well, the concern is that if the machines experience a 'blowback', the conflagration would be hot enough to melt aluminum, and molten aluminum dripping 6 stories through open grate flooring is a bit of a safety concern. I'll follow the paint manufacturers guidance to prep the steel. I don't know if the hi temp paint requires a hi temp primer of some sort.
Every sign in the order is unique, so silkscreening is out of the question, I guess I'll use cumputer cut masks and spray the paint through the masks. I've got 200+ signs to deliver by next Thursday and none of the material will get here 'till Monday so next week should be interesting. I've got enough material (and one can of paint) on hand to experiment with tomorrow & Friday.
What's amazing about this order is that the exact needs and specs of the end user weren't specified untill after the P.O. was issued on Monday and only then came out because I had a query about the colors to be used. Needless to say the price has changed a 'tad' and the p.o has been re-issued. It's been a good learning experience.
-------------------- Mike O'Neill
It has yet to be proven that intelligence has any survival value. - Arthur C. Clarke
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Mike i'm not sure what brand of paint you're thinking about using,but what little i do know about high temp stuf is this...most times its expensive,you know that,colro selection is limited,and if it needs to stand up to mo;ten metal like that its gonna be a boron nitride coating 9.5 times out of 10,its what they use to coat molds in steel plants etc.....i know it works,but usually a major component of it is silicone and whether or not the silicone is present it still winds up giving you a teflon like surface which,no offense to roger,no amount of rapid prep,thinner,acetone etc is going to enable you to letter on. The other downside is that most times when a high temp coating is used it has heavy red lead primer underneath which depending on where you are may be hard to get,impossible to get or you may have 7days of paperwork stating what you're gonna do with it. It also sometimes doesn't have gloss to it of any degree alotta times but in a plant that may not matter. A good place you could inquire further about info would be the Steel Structures Painting Council at www.sspc.org , or do a net search for ZYP coatings,they have to have a web page i'm sure. Hope this helps
-------------------- Gavin Chachere Plotter in the garage,New Orleans La.
"Sgts Shugart and Gordon again request permission to rope down to crash site two" Posts: 1223 | From: new orleans.la. | Registered: Mar 2000
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