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Without going into the merits of whether sand blasting is a good idea or not (I tend to think not), you need to ensure that the people doing the blasting, regardless of the media used, isolate the media to one metal. Aviation shops use one set of media for aluminum and another for ferris metals. This is because the media can pick up minute particles of metal and deposit them upon impact. Under certain conditions (High O2 and moisture) this can create dissimilar metal electrolysis (corrosion) to occur. For the same reason, abrasive brushes should also be dedicated to one metal. Chris Elmore PalmettoSoft Technologies Corp. (803) 233-2001 (work) (803) 348-3055 (mobile) ----- Original Message ----- From: Don Burke <donburke56@ne*.ne*> To: <techdiver@aquanaut.com> Sent: Thursday, March 29, 2001 1:36 PM Subject: Re: sandblasting > I'd be concerned about them using something hard like sand or diamond grit. > > If they use something soft like bicarbonate of soda or walnut shell, it > shouldn't be an issue, although I'd still want a hydro before I returned the > tank to service. > > Don > > > From: <sumpcaver@at*.ne*> > > It seems that there is a shop in my area that likes to > > sand blast the interior of steel SCUBA cylinders, even > > if there is slight surface rust. Any idea how the tank > > manufacturers feel on this? What about the issues of > > work hardening?? > > > > I have sandblasted many different objects with diffent > > media in the past, although one thing I have noticed is > > that blasted objects seemingly look clean and new while > > hiding more oxidation under the surface. > > > > I will not even get into their policy regarding O2 > > cleaning. > > > Shop online without a credit card > http://www.rocketcash.com > RocketCash, a NetZero subsidiary > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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