Damasko rust???

[toxicavenger]

Sounds like Damasko is fixing this issue. But damn that sounds crazy for it to happen. The watch has not been in salt water or a humid environment.
I didn't think it was possible with all the high tech shit they do to the metal. https://forums.watchuseek.com/f810/rust ... 17115.html

[hoppyjr]

I think this has come up before. Strange.

[Ruggs]

My understanding is that the hardening process that they use makes the steel less corrosion resistant. I think Archimede had similar issues with their hardened stuff.

[hoppyjr]

I think this has come up before. Strange.

[mattcantwin]

I think this has come up before. Strange.

Yes, I recall it, too.

[toxicavenger]

I think this has come up before. Strange.

Yes, I recall it, too.

It did it was rust on the caseback I think. This time it actually pitted the metal. Which makes me wound how the sealing surfaces of the caseback would look in a few years.

[toxicavenger]

My understanding is that the hardening process that they use makes the steel less corrosion resistant. I think Archimede had similar issues with their hardened stuff.

If that is true then there is no way I would give a shit about hardness of a watch case if it makes it more corrosive.

[sierra11b]

What is the hardening process? If it introduces more carbon to the steel then it'll happen for sure.

[Ruggs]

Looks like the archimede issue was just on the bracelet https://forums.watchuseek.com/f8/archim ... 722-2.html

[deepcdvr]

Hmm

After thirty years in the Navy, I have a hard time believing the watch wasn’t exposed to salt water or a “humid” environment, but that shouldn’t happen either way.

[sierra11b]

Watch SS is certainly not knife edge-retention SS, which is still prone to pitting and rust if not cared for, but if the metallurgy hardening process somehow introduces more carbon, then all bets are off. I'm not sure how an hardening process can't introduce more carbon, unless it's a gimmick. Powdered super steels only render a more homogeneous structure of the original billet steel process of the same chemistry.

Would be great to see an after picture to see if there's any pitting, or if the rust is somehow leeched on the surface and removable without pitting, which would be strange.

[toxicavenger]

Watch SS is certainly not knife edge-retention SS, which is still prone to pitting and rust if not cared for, but if the metallurgy hardening process somehow introduces more carbon, then all bets are off. I'm not sure how an hardening process can't introduce more carbon, unless it's a gimmick. Powdered super steels only render a more homogeneous structure of the original billet steel process of the same chemistry.

Would be great to see an after picture to see if there's any pitting, or if the rust is somehow leeched on the surface and removable without pitting, which would be strange.

Pitting after cleaning the rust off

[sierra11b]

Watch SS is certainly not knife edge-retention SS, which is still prone to pitting and rust if not cared for, but if the metallurgy hardening process somehow introduces more carbon, then all bets are off. I'm not sure how an hardening process can't introduce more carbon, unless it's a gimmick. Powdered super steels only render a more homogeneous structure of the original billet steel process of the same chemistry.

Would be great to see an after picture to see if there's any pitting, or if the rust is somehow leeched on the surface and removable without pitting, which would be strange.

Pitting after cleaning the rust off

316 and 904 would make a shit knife but it works great for watches because of their resistance to corrision. It's obvious the hardening process (or the undisclosed steel itself) is introducing carbon and it's leeching more like a semi-stainless steel. Rolex most likely thought of this and passed on the idea with their skilled in-house metallurgists, just as they passed on IR coating for likely the same reason to some extent, in wanting a pristine appearance "in-the-wild" prior to service, if service would ever be rendered. They'd still have a somewhat clean watch around the round table.

6 of one and half a dozen of the other on finish vs. hardness... If you wear Damasko oil the joints (and lugs) seems to apply just like a knife. Sinn seems to have figured it out, right? Would be interesting to break-down all the processes they all use, but it seems to be cloak and dagger much like DiaShield, in that nobody can ever quite explain the proprietary process fully.

[HapaHapa]

Maybe the watch and bracelet were wiped down with something that had another type of metal shavings, leading to galvanic corrosion?

[sierra11b]

Maybe the watch and bracelet were wiped down with something that had another type of metal shavings, leading to galvanic corrosion?

But would the coating prevent it? And what other metals could be introduced if all the steel process is the same at factory? It's the metal itself as no other metal is touching.

I once procured a custom knife from a very well known maker (today) during his first years. The bolster material, liners, and steel essentially put a battery in my pocket and I didn't see this level of rust/corrosion.

[Mr_Pacman]

pretty sure there were some instances of this happening to Sinn U1's in the past.

[logan2z]

pretty sure there were some instances of this happening to Sinn U1's in the past.

There was a long thread on WUS about a rusting U1 bracelet a few years ago, but the OP never followed up in the thread after having Sinn inspect the watch so it's not clear what caused the bracelet to rust. Apparently Sinn did replace the bracelet at no charge and the OP sold the watch.

https://forums.watchuseek.com/f24/sinn- ... 45704.html

[watches503]

I have a Zelos Hammerhead prototype with hardened steel showing plenty of rust by now and that’s why Elshan decided not to produce them. Ocean7 also had issues with their hardened LM-1.

I had a hardened steel H2O Orca that I was recommenced not to take to the beach or something. I can’t recall.


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[AtomicTom]

So strange that that could happen Terry, but wow Eric, you really shed some light !

Thanks so much guys !!!

[CarloDWC]

I don't know about you but when the watch is on the wrist and worn regularly especially if hot or warm my wrist is sweating even if little, that is moisture and it is salty... I never had it happen to any of my steel watches though... so something is not right with that Damasko...

[River Rat]

It is a micro brand weird I have vintage brand name watches older than I am with no rust.

[DEMO]

Yep, it is a result of the surface hardening process. I have seen several brands that have had a surface hardened treatment get a slight surface rust / pitting. It is something to do with the carbon hardening. I remember when Clemens at H2O was dealing with some customers that were experiencing this happening to some of their watches. I forget which model it was that had the surface hardening treatment.

[spring-diver]

Hopefully Damasko will replace case & bracelet. I haven’t had any problems with my tegimented Sinn’s

Cheers

[BBK357]

I am not surprised. After my vacation last year my U1P bracelet clasp started rusting. I was in the ocean with it and didn’t think a thing about it. Afterwords I did rinse it off in the pool when swimming. And after swimming in any kind of water I always wash it really well in the sink.

The good news is that watchbuys had the whole bracelet replaced. So no issue at all. They sent it as soon as they got word from Sinn and I sent my bracelet back in the box the new one came in, so no charge to me.



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[BBK357]

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