Chem assessment help.. (1 Viewer)

[Huratio]

my assignment is: ' Susceptibility of steels of differing composition to corrosion in sea water'

i tested: iron, galvanised, copper, brass, zinc plated

need help on:
'you may wish to include in your investigation the effects of inhibitors on the corrosion'
i tried to search the internet on salt water corrosion/sea water corrosion, and it just popped up all this stuff on engines.
and i need to hand this in on tuesday.. need help

 

[Huratio]

bump

 

[CM_Tutor]

Surely you have data on corrosion inhibition by having included things like galvanised iron, which can be compared to non-galvanised iron, structural steel, or whatever. Did you also include the wrapping of iron nails in a more active and less active metal wires, because that would also give you some useful comparison data?

 

[Huratio]

I only have information on basic corrosion, i'm looking for information on sea water corrosion?

 

[gman03]

If my memory serves, sea waters (and salty waters) prompts corrosion of nails as it acts like a salt bridge and carries the cations around the corrosion site..

And If i remember correctly, nails placed in pure water corrodes much slowly than in sea water because of the absend of ion impurities....

 

[CM_Tutor]

Sea Water corrosion is basically the same, but with a much more concentrated, and hence much more efficient, salt bridge.

 

[Huratio]

its okay now... the questionaire was easy