Quote:
Originally Posted by Jrboulder
"Bluing" is the passivation of the surface to black iron oxide (Fe3O4)
"Parkerizing" is a conversion coating involving zinc or manganese phosphate
In aviation bluing is like the surface oxidation layer of aluminum whereas parkerizing is like alodinde or some other hexavalent chromium conversion.
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Thanks for setting me straight - I clearly had that all wrong.
Now you have me wondering... My M1A is without a doubt parkerized, and I'm pretty darn sure my Springfield 1911 is as well - they are the same dull matte green. Is it possible for parkerizing to come out black, I mean dead flat black, with no hint of grey or green? That's what my new Colt is - could it be just matte bluing? The texture seems identical to parkerizing. Hmmm...