Author Topic: P47D recovery from Austrian lake (Read 1563 times)

straffo · « **Reply #30 on:** June 18, 2005, 03:22:11 AM »

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Originally posted by gripen
Straffo,
True but it's not the reason why there is less rusting in the wreckages lying in the deep parts of the Baltic sea. In the deeper areas of the Baltic sea there is very little change of water (streams or storms or what ever) between bottom and surface of the sea. Therefore there is very little oxygen and therefore also most of deeper parts of the Baltic sea are practically dead areas (below surface layers where wind and storms change water).

gripen

didn't new that, thank for the info.

Wilbus · « **Reply #31 on:** June 18, 2005, 12:16:45 PM »

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Straffo, True but it's not the reason why there is less rusting in the wreckages lying in the deep parts of the Baltic sea. In the deeper areas of the Baltic sea there is very little change of water (streams or storms or what ever) between bottom and surface of the sea. Therefore there is very little oxygen and therefore also most of deeper parts of the Baltic sea are practically dead areas (below surface layers where wind and storms change water). gripen

Gripen, sweet water or low % salt water is a big part of the reason aswell, not only the lack of oxygen.

Salt water is a big reason when it comes rust.

It's not difficult to test. I personally noticed it very well with my leatherman multi-tool. It recieved quite a bit of surface rust after I had used it in salt water. That doesn't happen in sweet water.

Ecliptik · « **Reply #32 on:** June 20, 2005, 01:04:33 AM »

Gripen is correct Wilbus. Without oxygen, rusting simply cannot occur, no matter how much salt is present. Salt only catalyzes the reaction by increasing the conductivity of the water, which is important because rust corrosion is an indirect reaction that occurs partly via electron transfer (redox).

In oxygenated freshwater with zero salt content your leatherman will still rust eventually, but more slowly than in saltwater. In completely deoxygenated water, nothing will rust.

OOZ662 · « **Reply #33 on:** June 20, 2005, 02:00:48 AM »

Take a small hunk of metal and leave it in a bowl of salt water for a few months. If me and all these other guys are right, the metal shouldn't rust much. Take it out and set it on the table for a few months and it'll be nasty.

Wilbus · « **Reply #34 on:** June 20, 2005, 02:09:37 AM »

Yeah I know oxygen is needed to make things rust. What I tried to say is that salt hurries up the corrosion if there is the same amount of oxygen. (no mather if there is little oxygen or alot of oxygen)...

straffo · « **Reply #35 on:** June 20, 2005, 03:25:54 AM »

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Originally posted by Wilbus
Yeah I know oxygen is needed to make things rust. What I tried to say is that salt hurries up the corrosion if there is the same amount of oxygen. (no mather if there is little oxygen or alot of oxygen)...

Well I wanted to point the effetc of the quantity of salt.

SFRT - Frenchy · « **Reply #36 on:** June 20, 2005, 04:51:51 PM »

Is the pilot still alive?

Guppy35 · « **Reply #37 on:** June 20, 2005, 10:12:23 PM »

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Originally posted by SFRT - Frenchy
Is the pilot still alive?

Yep

Dan/CorkyJr

Angus · « **Reply #38 on:** June 21, 2005, 12:05:38 PM »

Speaking of corrosion, remember the effect of bacteria as well.
Entire ships of WW2, resting on the seabed are disappearing, and will not be there in some 100 years (?), for they are simply being "eaten".
The Titanic is falling apart and disappearing (Well, 1912), but even the Bismarck will fall pray to the same enemy.
Those are 3-4 km deep!
BTW, the Bismarck looks quite good still! Being a good looking vessel from the start, the hull is remarkably intact.
The HMS Hood is however torn up really bad.
(Resting not so far from where I live)

Uhhh, didn't want to hijack this into shipwrecks, - my point was meant to be that this P47 looks incredibly good if one bears in mind that it's been there for some 60 years!