this post was submitted on 12 Jan 2024
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[–] XeroxCool@lemmy.world 47 points 2 years ago* (last edited 2 years ago) (1 children)

A process that normally lowers the corrosion resistance had the opposite effect when applied over an alternate known-good option. Chromium passivation is the known-good, manganese passivation is known to make it worse. Manganese-passivating chromium-passivated stainless looks like it's way more corrosion resistant than either passivation on its own and non-passivated stainless

Also, daily reminder, stainless steel corrodes. It forms a corrosion layer that is hard and doesn't change size compared to the base metal (unlike rust on normal steel, which expands), but it can still be prone to erosion particularly in oxygen-depleted water. Even 316.

[–] NoSpotOfGround@lemmy.world 0 points 2 years ago (1 children)

I'm kinda glad stainless steel corrodes in the end. Else it would become a micro-fragment polluter like plastic.

[–] XeroxCool@lemmy.world 1 points 2 years ago

I'd say a major difference is that steel is an alloy of natural inorganic elements. The components aren't especially toxic, at least not any more than how they already exist in the environment. Microplastics are entirely man made and don't have any natural, decent way to be broken down organically. Would you count sand as a pollutant? It'll last way longer than plastic and we certainly ship it around everywhere. Eating sand is just part of marine life

[–] sxan@midwest.social 20 points 2 years ago (3 children)

How are the other properties? Will this stuff appear in knives? Hardness, edge retention, brittle... ness-ity?

Will this change my life, or is it just a curiosity to amuse material scientists?

[–] Langehund@lemmy.world 41 points 2 years ago (1 children)

This steels intended design use is hydrogen production through the electrolysis of salt water. Typically it is done with titanium because existing stainless steels corrode too much in the high chloride environment. But this novel process of adding corrosion resistance steel performs just as well as the titanium. It’s not a knife steel. As with most material science materials, this was designed for a specific use case in mind. Not all steels have to be good at everything. A knife super steel would probably be bad at hydrogen production for example.

[–] sxan@midwest.social 9 points 2 years ago

Thanks!

True, steels are very specific, even within knife applications. For instance, there are certain steels used for knives for marine environments; they're not usually used outside of those specialty knives because they give up other desireable characteristics for the corrosion resistance.

Which leads me back to why I asked the question. Corrosion/rust resistance is desireable in knives, and that's what this sounded like. Ah, well... maybe it'll inform the next generation of steels.

[–] webghost0101@sopuli.xyz 2 points 2 years ago* (last edited 2 years ago)

The way i read it is its another big step in the development of nanocomposites/meta materials.

You can sort of explain it by hand carving materials on a molecular level so they exibit all kinds of possibly exitic effects. Like deforming light or to kill certain germs.

Its one of my favorite tech to mention because the story of supposed normal looking but atomically weird materials found at ufo crashsites

[–] PlutoniumAcid@lemmy.world 2 points 1 year ago (1 children)

brittle... ness-ity?

I love you!

[–] sxan@midwest.social 2 points 1 year ago

And I love you, PlutoniumAcid!

[–] KingJalopy@lemm.ee 18 points 2 years ago (5 children)
[–] tacosanonymous@lemm.ee 15 points 2 years ago (1 children)

Of course I can’t. But they fucking should.

[–] KingJalopy@lemm.ee 4 points 2 years ago (2 children)

I was making a lame attempt at that Bill O'Reilly joke about magnets or whatever, but you're right, they fucking should!

[–] emmanuel_car@kbin.social 8 points 2 years ago* (last edited 2 years ago) (2 children)
[–] DogWater@lemmy.world 7 points 2 years ago

That's ancient internet wisdom.

Sage posting for real

[–] null@slrpnk.net 3 points 2 years ago (1 children)

Some people can, and I do not trust those people.

[–] nodimetotie@lemmy.world 2 points 2 years ago

Probably because they reveal that fact to you?

[–] Tolookah@discuss.tchncs.de 2 points 2 years ago

It wasn't even magnets, it was the tide.

[–] ikidd@lemmy.world 5 points 2 years ago (2 children)

And SS isn't magnetic, either.

Explain that, juggalos.

[–] HootinNHollerin@lemmy.world 3 points 2 years ago* (last edited 2 years ago)

300 series isn’t but 400 series is mildly magnetic

And that’s my lesson for you juggalos and juggalettes today - skelator.jpg

[–] KingJalopy@lemm.ee 3 points 2 years ago

Checkmate atheists

[–] Orbituary@lemmy.world 3 points 2 years ago (1 children)
[–] kozy138@lemm.ee 3 points 2 years ago (1 children)
[–] DScratch@sh.itjust.works 1 points 2 years ago

NEATallurgy.

[–] Sharpiemarker@startrek.website 3 points 2 years ago

I certainly can't

[–] avidamoeba@lemmy.ca 1 points 2 years ago* (last edited 2 years ago)

Who put it there?

[–] JimmyBigSausage@lemm.ee 7 points 2 years ago (4 children)

Not clicking. Too many ads.

[–] null@slrpnk.net 7 points 2 years ago (1 children)

How do you know there's ads if you didn't click? 🤔

Also what kind of maniac doesn't use an ad-blocker?

[–] Kbobabob@lemmy.world 2 points 2 years ago

Maybe they are just traumatized from a past ad experience.

[–] 21Cabbage@lemmynsfw.com 5 points 2 years ago

Might be my browser setup but I read through without seeing a single ad, even in the links at the bottom.

[–] CrayonRosary@lemmy.world 2 points 2 years ago

Use a browser with uBlock Origin

[–] Kbobabob@lemmy.world 1 points 2 years ago* (last edited 2 years ago)