Archived posting to the Leica Users Group, 2020/07/09
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]I checked the? chimes with a magnet, and the material is non-ferrous.? It appears that the chimes and clapper are cut from the same tubing material, which appears to be aluminum.? From my university days in the 1940s, I recall that one of the popular aircraft materials was called ALCLAD, which was an aluminum alloy protected by a coating of pure aluminum to resist the effects of corrosion. I must assume that the continuous tapping of the clapper causes some type of reaction in the material. On 7/9/20 8:35 AM, Philippe via LUG wrote: > The culprit will be the horizontal clapper, made of a different material. > Electrolysis over time and banging will have depositied a thin layer over > the protective skin of aluminium oxide. > > > Amities > > Philippe > > > >> Le 8 juil. 2020 ? 19:16, Jim Nichols <jhnichols at lighttube.net> a ?crit >> : >> >> These old aluminum chimes have oxidized from years of contact. >> >> http://www.gallery.leica-users.org/v/OldNick/20200708-P7082399.JPG.html >> >> -- >> Jim Nichols >> Tullahoma, TN USA >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- Jim Nichols Tullahoma, TN USA