[Leica] IMG: Contact !

[Douglas Barry]

Chimes on a windy night? I hope they're not too close to your bedroom 
window!

On 09/07/2020 15:28, Jim Nichols wrote:
> 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 à 19:16, Jim Nichols <jhnichols at lighttube.net> a 
>>> écrit :
>>>
>>> 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
>>