[ARC5] [Milsurplus] Mil Circular Material Questions

[Brian Clarke]

I have many mil circular connectors some of which were black anodised and 
some OD anodised by the manufacturer. One should not rely on conductivity of 
the shell, except perhaps as some kind of shielding.
When I was a little boy, I was encouraged to believe that the connector 
shells were made from 'muck-metal', a zinc-based alloy, easy to die cast. 
This may be why corroded connector shells appear white. But then, one form 
of aluminium oxide is white, too. You can bet your boots it's not a titanium 
alloy (titanium oxide is used in expensive toothpastes as a 'whitener').
73 de Brian, VK2GCE.

----- Original Message ----- 
From: "J. Forster" <jfor at quikus.com>
To: "Mark J. Blair" <nf6x at nf6x.net>
Cc: <arc5 at mailman.qth.net>; <vintage-military-radar at yahoogroups.com>; 
<milsurplus at mailman.qth.net>; <vmars at yahoogroups.com>
Sent: Friday, March 28, 2014 5:57 AM
Subject: Re: [ARC5] [Milsurplus] Mil Circular Material Questions


>I don't think they are plated. They are not anodized for sure, since the
> eletrical conductivity is good.
>
> It is possible they have a coinversion coating, like Alodine, but no
> yellow color.
>
> -John
>
> ==============
>
>
>
>>
>> On Mar 27, 2014, at 10:12 , J. Forster <jfor at quikus.com> wrote:
>>> Does anyone know about the Aluminum alloy used to cast the connector
>>> bodies? Is it perhaps high in Magnesium which is more reactive and tends
>>> to rot in moist environments?
>>
>> Could it be due to plating differences?
>>
>> --
>> Mark J. Blair, NF6X <nf6x at nf6x.net>
>> http://www.nf6x.net/
>>
>>
>
>
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html