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Old 10-08-2014, 09:30 AM
longyard longyard is offline
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Default Black Metal Process ?

Anyone know the name for the process to turn steel black? For instance, an engine cylinder jug like on a VW Beetle? I believe it's some sort of oxidizing process, but not sure.
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Old 10-08-2014, 09:50 AM
weldtoride weldtoride is offline
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Hey, Bill, great second book! One way to blacken steel is Parkerizing.
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Old 10-08-2014, 09:59 AM
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Steve Hamilton Steve Hamilton is offline
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Bill

The coating on black bolts used on 50's cars, was black oxide an coated with an oil that air dried.

I don't think that would last long on engine parts as the oil would burn off and they would turn to rust!

Steve
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Old 10-08-2014, 11:10 AM
arn arn is offline
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It could be manganese phosphate you're thinking of...
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Old 10-08-2014, 12:00 PM
longyard longyard is offline
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Quote:
Originally Posted by weldtoride View Post
Hey, Bill, great second book! One way to blacken steel is Parkerizing.

Does Parkerizing turn things black? I thought it was a dull green like on original military 1911s?
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Old 10-08-2014, 01:14 PM
bobadame bobadame is offline
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[QUOTE=longyard;104366]Does Parkerizing turn things black?

Yes it does. There is another process called "tool black". It's fast and easy but a bit pricey.
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Old 10-08-2014, 02:52 PM
jehammer1952 jehammer1952 is offline
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Default Bill check this out I think this is what your looking for

Log-in or create an account to earn 50 Caswell Gold Rewards Points for liking this page.
Black Oxide Kits
Black Oxide Kit

This new technique was developed by the commercial gun blue manufacturers as a more environmentally friendly system than the commonly used hot application. Parts requiring blackening are simply placed in the liquid at room temperature, no electrical power is required.



Black Oxide Parts

jehammer1952
john escolano
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Old 10-08-2014, 03:35 PM
Gareth Davies Gareth Davies is offline
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I found this http://www.chingfordtec.co.uk/chemical-blacking.php

Ok, so it's a UK company but it may give you some answers, hope it helps.
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Old 10-08-2014, 04:42 PM
Oldnek Oldnek is offline
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You can turn pretty much anything black, by heating and dropping into sump oil and let air cool.
I tried this process for a Stator cover, but it tarnishes the Alloy rather than going black like Bolts.

I have also treated most of my pliers and impact sockets this way to prevent rusting. works great seen as I'm right on the coast.
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Old 10-10-2014, 04:08 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by jehammer1952 View Post
Log-in or create an account to earn 50 Caswell Gold Rewards Points for liking this page.
Black Oxide Kits
Black Oxide Kit

This new technique was developed by the commercial gun blue manufacturers as a more environmentally friendly system than the commonly used hot application. Parts requiring blackening are simply placed in the liquid at room temperature, no electrical power is required.

Black Oxide Parts

jehammer1952
john escolano
The blackening processes for steel that I am familiar with are:
Houghto black - a hot bath of Houghton Chemical co solution, after solvent washing and rinsing.
Black oxide - another hot bath immersion method, not as rigorous as the Houghto.
Gun blueing - Hot
Gun blueing - cold (will rust after a time)
Heating the steel to purple heat, and dropping in boiled linseed oil - remove and let dry - pretty good stuff.
Misc other methods, like Caswell and others .... some not so hot, others questionable, have not heard rave reviews about weather-resisting products.

gun forums have a lot of chitchat about this - I can check.

hope this helps, Bill
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