Thread: carbon versus oxigen

in a mixture of nitrogen and oxigen, in which carbonsteel is exposed,
making following plots:

fe2O3:
Y-axis:likeliness for FE2O3 to occur
X-axis:nitrogen/oxigen ratio (oxigen/exposed steel ratio)
surface corosion (solid deposits)
CO2:
Y-axis:likeliness for CO2 to occur
X-axis:nitrogen/oxigen ratio (oxigen/exposed steel ratio)
pitting corosion (vapour expell)

where on the X-axis would each plot peak?

Have you even read the forum policy on homework help?

mmm homework....
is that concidered to be the stuff you do at home being a student?
thanks for the compliment (I am over fourthy)

You obviously know a good bit of chemistry. Do yourself the favor of editing your posting to correct the spelling of OXYGEN. ...Dr.Syntax

Originally Posted by 3s

mmm homework....
is that concidered to be the stuff you do at home being a student?
thanks for the compliment (I am over fourthy)

3s
Your post reads exactly like an extract from a homework assignment. You have included no explanation for why you would like an answer to these questions. The conclusion is that this is indeed homework.

If you were in your late teens or very early twenties you would have an excuse for posting such a query without any explanation.
You would also have an excuse for not giving some insight into your level of knowledge so that responders could pitch their answer at the right level.
You would have a further excuse for the curt way you ask the question and thus we could assume you were just ignorant rather than rude.

Yet you say you are 'over fourthy', so all those excuses vanish.

Good luck waiting for an answer.

i have some knowledge about chemistry,
though being more specialised in engineering.
reason for posting the Q was everithing from being wanting to be rude or ignorant...
I tried to understand why with machinery I came across (gasturbines,pumps)
pitting corrosion only was found on their splitline (low oxygen exposure)and only slight surface corrosion on its internals(high oxygen exposure)

Pumps and gas turbines usually have different materials of construction for the casing and the internals, so you wouldn't necessarily expect the corrosion to be of the same type or the same severity. An API 610 pump with S6 materials has a carbon steel casing and 12% chromium steel impeller. This quite a common combination. Gas turbines are made of more exotic alloys. I doubt if there is much carbon steel in the gas passages.