Author Topic: 1 Hour Red Rust Bluing  (Read 1529 times)

Offline thecogwheel

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1 Hour Red Rust Bluing
« on: March 11, 2018, 07:01:07 PM »
I made some vise clamps for the milling machine.

I've been doing some reading on various processes used to provide a protective coating. Specifically I was looking for a process that I could easily do in the home shop. I've been thinking about buying some cold blue and I was just about to until I started reading about some of the rust bluing processes. The only problem was that traditional rust bluing takes a long time.

I did some more reading and I recalled an experiment we did in high school chemistry involving a mixture of hydrogen peroxide and salt applied to steel wool. The hydrogen peroxide and salt rusted the steel wool so quickly that you could measure the temperature change. I then did some further searching and I found someone beat me to the idea of quickly rusting parts using hydrogen peroxide and salt:

I tried it out on the clamps, it took only about an hour or so, and I'm very pleased with the results:

I made a video out of the process:

Here is the direct link if you wish to watch it via Youtube's site:

Offline SwarfnStuff

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Re: 1 Hour Red Rust Bluing
« Reply #1 on: March 12, 2018, 12:11:05 AM »
Thanks for sharing.
         A useful & interesting bit of information that I now have to file away, THEN remember where I did so.
         I'm sure I will be using this in the not too distant future. Previously I have used heat & oil quench to blacken.
Thanks again,
John B
Converting good metal into swarf sometimes ending up with something useful. ;-)

Offline vtsteam

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Re: 1 Hour Red Rust Bluing
« Reply #2 on: March 12, 2018, 09:08:39 AM »
Thank you for that, thecogwheel.  :thumbup: I'm sure I'll be trying it. Quite fond of non-exotic household materials and scrap processes. Probably why I visit this forum.  :dremel:
I love it when a Plan B comes together!