[Farmall] Cultivator Colors

[szabelsk at gdls.com]

The rear rims were always galvanized (silver). Galvanizing is just a zinc 
plating applied to ferrous metals to prevent rusting. The zinc is 
corrosion resistant and acts as a sacrificial anode to help keep the 
ferrous metal from rusting. It wears better than paint and is more rust 
resistant unless you really scrape it up and remove a very large area of 
the zinc (or happen to get calcium chloride on them). On galvanized 
material you can scratch the galvanizing off and it will still not rust 
because the surrounding zinc that remains still acts as a sacrificial 
anode and cathodically protects the steel. The rims probably had a heavier 
plating on them than what you find on metal trash cans.

When I replaced my rusted out rims three years ago (calcium chloride 
rusted of course) the replacement rims were a light cream color. I found 
some Rust-Oleum spray on galvanizing paint and painted them with that. The 
paint has 94% zinc in it, which is what helps to make actual galvanizing 
rust resistant. When it dries it has the same look as galvanized metal, 
and not the real silvery look of most silver paints. It's been three years 
and they still look like I just recently painted them, and not a spec of 
rust yet.

Carl Szabelski



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