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Post Reply - More Scans of The Green Finish On M1 Carbines


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Topic - More Scans of The Green Finish On M1 Carbines
Posted: Nov 17 2021 at 8:05am By New2brass
Parco-Lubrite did have copper in their parkerizing solution, this is what lead to lower temperatures needed for the process.

Park does display different shades on different compositions of metal as well over time in the batch. In the mornings it was found that the acidity climbed. The copper helped reduce the swing.

I believe the addition of copper  actually creates a blacker finish, but not positive.

I believe the receivers were 4140, which is composed of
Chromium, Cr
Manganese, Mn
Carbon, C
Silicon, Si
Molybdenum, Mo
Sulfur, S
Phosphorous, P
Iron, Fe

From your other post I replied
Originally posted by New2brass New2brass wrote:

Interesting stuff!
I guess the analyzer does not check carbon and silicon?

Was the metal prepped or cleaned before the test?

then looking closer there were some interesting elements which lead me to ask if the sample was cleaned to eliminate residual items

Blackfish, what do you think of the presence of
Titanium
Tungsten
Potassium
Bismuth
Rubidium
all in addition to the said copper?

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