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Old 19th August 2001, 08:57 PM   #1
Koy is offline Koy  Czech Republic
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Does anybody know how to paint (passivate) iron (steel) part to black colour ? Not using any enamel only chemically. As I remember I could be done with some mixture of phospohoric acid and .. or chromic acid.Thanks
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Old 19th August 2001, 10:04 PM   #2
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A process used for rifle parts commonly referred to as 'blacking' causes a controlled corrosion reaction on the steel surface (not oxidization). This forms a protective layer preventing further oxidization. If you like I can look up the exact details of chemicals and quantities for this process.

Dan
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Old 19th August 2001, 11:16 PM   #3
Koy is offline Koy  Czech Republic
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That is it! It was used for renovation of my air gun.
If you be so kind to send me the details.Thank you.

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Old 19th August 2001, 11:24 PM   #4
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I'll get on to it give me a couple of days to find the book

Dan
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Old 20th August 2001, 01:56 AM   #5
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I have re-finished a gun using a commercial gun "bluing" solution probably obtainable at any gun store. This put a nice shade on the steel and you could make it darker by applying more coats. This is not a paint but chemically changes the surface.
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Old 28th August 2001, 08:46 AM   #6
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Good idea!
Do you know if this product is also suitable for stainless steel?
Thanks

[Edited by tortello on 08-28-2001 at 06:06 AM]
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Old 28th August 2001, 02:24 PM   #7
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Check this site: http://www.wholesalehunter.com/produ...GunBlueing.htm
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