In Reply to: Re: Early 39 9N loop rims posted by Farmer Dan on October 03, 2018 at 20:00:16:
I believe all the rims that were plated were done with zinc. I have a set of 32 x 8 hat wins that still have some of the zinc plating in place and my 8N rims had some on them too under the paint. Zinc is used to prevent corrosion where the cad plating is more decorative like chrome. Steel hulled ships have numerous zinc blocks that are poured around steel straps and welded to the hull to prevent corrosion. The sea water slowly eats the zinc instead of the steel hull and, when eaten away, the blocks are replaced with fresh ones when in dry dock.
The principal is the same with the rear rims which were subjected to lots of moisture. The same would apply to the front wheels but in a much lesser degree than those driving and the front wheels and tires much easier and cheaper to replace (and clean) than the rear rims-so not worth the effort. That's my take on it. But still wonder if anyone has come across a set of original 32 x 8 loops that had plating on them or vintage photos featuring plated loops on the tractor.