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>Date: Mon, 07 Aug 2000 15:56:47 -0400 >To: vbtech@ci*.co* >From: Charles Ayash <cagraphics@mi*.co*> >Subject: Re:Tanks-Paint and Rust/ The Fix > > > >Rust >3m Rust Avenger (3m#3180) list price 5.29 >This is a pen type unit that also has an abrasion tip >on the cap, that is used to scuff the loose rust particles. >The pen is then used to apply a thin coat of liquid >that stops the rust and also becomes a protective coating. > >Can be purchased at a auto paint and body supplier/jobber. > > >Blasting a cylinder and new powder coating?? >Al. cylinders or steel; IF blasted would be costly >due to Glass Bead Blasting would be better than sand. >By the time you powder coat the tank I think that >a new Luxfer would be cheaper and Safer. > >A better method than powder coating would be to use >an Epoxy Primer and Paint. So unless you are a Painter >"ya gonna pay" someone to pull the trigger not to mention >the cost of these paints. >This is not cheap, as you have the cost of the Paint, Reducer, >and Hardner. > >After talking with a client who is in the powder coating business. >Here are a couple of variables. Which Greatly depend upon the >Material, Casting Process, and Material Thickness. > >Aluminum baking temps will range from 320 deg-400 for 30-60 minutes >Steel appx 400 deg from 2-3 hours and possibly a rebake for another 2-3 hrs. > > >Again I think you would save time and money by purchasing new. >Did I forget the Integrity of the Cylinder? Safty Safty Safty > > >I hope this helps a bit. > >Regards >Charlie > > > > > >At 08:18 AM 8/7/00 -0400, you wrote: >>We had a group of individuals CA, FL, NY, & NJ joint us for the weekend of >>diving out of Virginia Beach (Trip reports to follow). One very interesting >>discovery upon removal of my tank boots was rust. >> >>Tanks: are SCUBAPRO steel 95s, white, and about three years old. >> >>Care: these tanks are VIP as required, washed off with fresh city water >>after every dive (even quarry/lake), and stand up in my garage when not in >>use. >> >>Result: The paint under the boots hass bubbled and formed pockets for the >>salt water to collect. I do not know if the paint and water react under the >>paint as it does in fiberglass boats or not to form an acid compoound. I >>hope someone out there, in the knows, has the answer to that. It has cause >>some extensive surface rust (already had two opinions from technicians on >>this). >> >>Several other sets of tanks have been checked and found to have similar >>conditions with different ages and manufacting date/group. OMS versions, on >>a limited check group, appear not to have this problem. >> >>If you have SCUBAPRO tanks with boots on, remove and check for rust ASAP. >> >>Now what is the best preparation and painting to stop this and preserve the >>metal? >> >>David >> >> >> >><< Send subscribe/unsubscribe/help requests to VBTech-request@ci*.co* >> >> >
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