Cooking up Black Oxide - DIY Blackening of Metal

Рет қаралды 23,038

3 жыл бұрын

I show the ordinary household chemicals and explain the process for creating a black oxide (magnetite?) layer on black pipe. Can be done in your kitchen.

Пікірлер: 34

@antimatter314 Ай бұрын

When I strip my parts with hydrochloric acid and rinse in water, in no time at all you can see rust starting to form. It's rather cool to watch.

@michaeldarby2242 Жыл бұрын

In the firearm world its called slow rust bluing. One of the best ways to do a firearm because you are making it rust and leaving nothing more to rust, only thing that the firearm is harmed by is a politician. FYI, it's not that your solution wasn't working anymore, it's the rust time, that's why we call it slow rust bluing. Fabulous job btw....

@alexa.davronov1537 2 жыл бұрын

Nice video. Thanks for sharing!

@blackseabrew 5 ай бұрын

I was cleaning some rusted bolts and nuts with muriatic acid. I think it was a 31% solution available at hardware store. And it was diluted even more with water. Being curious I left some parts in the tub for an extended acid bath. They ended up pickling. Surprised for sure.

@antimatter314 Ай бұрын

I left a part in some hydrochloric acid overnight and it also turned black.

@lifestooshort81 6 ай бұрын

Great Video. Thanks for posting this/sharing. I've been looking for a DIY alternative to Caswell's black oxide kit - I want to blacken several truss plates to look a piece of wrought iron plate and I knew there had to be a simple 'at-home' method. I know I could also heat the pieces and dip them in used motor oil but that gets messy and I don't want to be dumping used motor oil all over my driveway.

@scotty362100 3 жыл бұрын

The "black" that is on the pipes is a varnish that is used to keep them from rusting on their trip from china. They won't oxide/rust until you remove this coating. You need to use a paint thinner to dissolve the varnish. Acetone will not remove varnish. I am a pipefitter of 38 years in the trade.

@yourboard5506 3 жыл бұрын

Thanks for clearing up the varnish question. Some had it and some didn't. For indoor use I'm good with the varnish.

@alexa.davronov1537 2 жыл бұрын

Thumbing up. It's better to try to use something like kerosene I think.

@asmaael-sayed8744 Жыл бұрын

Thanks,I want solution to black oxidation of tin plated parts

@BossMan-yu1og 14 күн бұрын

You seem like a very smart man. Why in the world do you have highly flammable and potentially explosive acetone sitting on top of a heated stove?!?!?

@yourboard5506 13 күн бұрын

Good observation. Yeah, don't try that at home. Definitely not a good idea and makes a bad image. I'm pretty sure it was there only briefly for the video. Good thing the stove only get hot where those round circles are on the stove. I guess I should have been more worried about that rather than the explosion happening if I had dropped one of those metal pieces and craked my wife's glass cooktop.

@nickmcnellis3937 2 жыл бұрын

Ha, my wife would freak if I did something like this in the kitchen.

@yourboard5506 2 жыл бұрын

And so did mine. But after the fact. I was well into it before the smell got her attention.

@TheBeStLifehomestead 9 ай бұрын

Im curious about the mixing of vinegar and hydrogen peroxide comment. Almost all the info ive found on rust bluing they mix all 3 together

@yourboard5506 7 ай бұрын

I am not a chemist so I err on the side of caution. Don't mix hydrogen peroxide and vinegar together in the same mixture. This can create peracetic acid, which may be toxic and can irritate your throat and lungs, eyes and skin. If outdoors with good ventilation and with a good acid gas filter mask, it might be ok.

@thuglincoln7699 Ай бұрын

@@yourboard5506 It creates Peracetic acid which is simply stronger than Acetic acid - most of the cautions you see about that acid are related to high volumes of exposure.

@xSO20 2 жыл бұрын

so what we see and buy from a black oxide solution is just a hydrogen peroxide with salt?

@yourboard5506 2 жыл бұрын

Commercial black oxide concentrate is more than this. It's typically a mixture of phosphoric and other acids that corrode much faster.

@granthennings4594 Жыл бұрын

Are thos steel pipes not galvanised?

@yourboard5506 Жыл бұрын

Black pipe. Not Galvanized.

@gordonloessl2822 3 жыл бұрын

He is obviously not married. I would have to do this outside or in the garage.

@yourboard5506 3 жыл бұрын

My second batch was outside on the camp stove and I still got complaints about the smell. Best to do it outside and don't open the door :)

@guytiips3906 2 жыл бұрын

It not about married

@bharatsshettigar7815 3 жыл бұрын

How long it goes

@yourboard5506 3 жыл бұрын

It takes at least an hour to get through all the steps, prep and cleanup. Longer the more pieces you have. Would much faster if we had bigger pans and a basket to transfer all parts at one time.

@andrimoldyansah1275 3 жыл бұрын

Can you write the inggridient for this project

@yourboard5506 3 жыл бұрын

Degreaser: TSP and / or Acetone Pickling: 6% white vinegar Oxidizer: hydrogen peroxide + small amount of salt. Boiling water. Alternate between oxidizer and boiling water several times. Remember not to mix vinegar and hydrogen peroxide

@platinummind1697 Жыл бұрын

@@yourboard5506 What % is the hydrogen peroxide? Thanks.

@yourboard5506 Жыл бұрын

@@platinummind1697 3% is the typical household hydrogen peroxide. That is what I used.