[ARC5] Chassis Cleaning

[Phillip Carpenter]

I don't know for sure but I think the plating on the Hallicrafters SX-43 steel chassis might be zinc.

Phillip W4RTX

Sent from my iPhone

> On May 25, 2016, at 6:39 PM, Richard Knoppow <1oldlens1 at ix.netcom.com> wrote:
> 
>    I think the main purpose of cadmium plating was as a "secrificial" coating  to prevent corrosion. I have never heard that the small amount of cadmium released by sanding a chassis is dangerous but a dust mask and goggles should be worn even when sanding wood.  Cadmium plating was restricted mostly due to the environmental hazard of the metal.  Until the fairly recent past it was very common to cadmium plat steel chassis. The other "sacrificial" plating found commonly is zinc. Old zinc plated stuff often develops a coating of zinc oxide, a white powder. Zinc oxide is used as a skin protectant in sunburn lotion and in medications.  
> 
>> On 5/25/2016 3:25 PM, Bart Lee wrote:
>> Phillip, 
>> 
>> Beware of cadmium plating.  This was used to facilitate soldering to the chassis. If abraded it can liberate cadmium dust.  This is bad for children and other living things.
>> 
>> 73 de Bart, K6VK 
>> ##
>> 
>> -- -- 
>> Bart Lee, ​K6VK, CHRS, AWA, ARRL​ 
>> Attorney at Law 
>> Office Phone 415 956 5959 x203
>> Office Fax Line 415 362 1431 
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>> Snail Mail: 388 Market St #900 
>> San Francisco, CA 94111-5311
>> www.bartlee.com 
>> 
>> 
>>> On Wed, May 25, 2016 at 8:29 AM, Phillip Carpenter <carpenterpa at tds.net> wrote:
>>> 
>>> I'm looking for some advice for cleaning up a Hallicrafters SX-43.
>>> 
>>> I want to clean the steel chassis top surface. I think the steel may have a plating. There is a little rust in spots but not too bad.
>>> 
>>> Can anyone recommend what should be used to clean and polish this type of chassis?
>>> 
>>> I'll be replacing a bunch of wax paper caps as soon as I get the chassis cleaned up.
>>> 
>>> Thanks in advance to all who respond.
>>> 
>>> Respectfully,
>>> 
>>> Phillip W4RTX
>>> 
>>> Sent from my iPhone
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>> 
>> 
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> 
> -- 
> Richard Knoppow
> 1oldlens1 at ix.netcom.com
> WB6KBL
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