At 12:00 PM 6/30/2006 -0700, Alistair Bell wrote: >The surface area of the sacrificial metal, Al, was much, much greater >than the "gaining " metal stainless. Imagine the corrosion if it were >the other way around, or imagine someone using aluminium pop rivets >in a stainless structure exposed to salt air or spray, the rivets >would be corroded away in no time. I've seen aluminum castings (aluminum cleat on anodized aluminum mast, s/s fastenings) burst apart because the corrosion products from the aluminum could no longer fit in the slack space of the mounting holes.
-- David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage," '85 GL "Poor Relation" |
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