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Date:         Sat, 16 Jan 1999 21:36:00 -0800
Reply-To:     Jim Arnott <jrasite@EONI.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jim Arnott <jrasite@EONI.COM>
Organization: WetWesties
Subject:      Re: Seam bubbling
Comments: To: Blue Eyes <lvlearn@MCI2000.COM>
Content-Type: text/plain; charset=us-ascii

Hence: "Rust never sleeps."

Jim

Blue Eyes wrote: > > Seam bubbling arises when oxidation occurs between > seals at joined body panels. This process > destroys the metallic body to the extent that it > occurs. While it's occurring, the chemistry > produces "out gassing" which causes stretched > gasket and paint material, often observable as > bubbles. One particularly nasty aspect of this > process is that the first rust produced then > absorbs moisture from available air because rust > is mildly deliquescent. This makes the rusting > process self sustaining. So the analogy to > biological cancer is rather apt. Once it starts, > it tends to go to completion unless heroic efforts > are made. If we could prevent any more water from > becoming available to the process, it would not > continue. But once it's started, you already have > a seal breach, so it is slowly dying. Casual > stop-gap measures can slow, but never arrest > continued development. > John


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