Al -
You are correct in that Al can be used to de-oxidise molten steel since it has a free energy lower than that
of the carbon + oxygen reaction but it is not the only addition that
could be used. Try again.
Al + Si - Correct. Both of these additions could
be used as their free energies of reaction are more negative than
the carbon + oxygen reaction.
Al + Si + Mn + Cr - Incorrect, it is not possible
to use all of these additives as the Mn and Cr lines lie above the C
+ O = CO line at 1600°C. Try again
Mn + Cr - Incorrect, it is not possible to use Mn and Cr as their
lines lie above the C + O = CO line at 1600°C. Try again
Which addition(s) could be made to de-oxidise the molten steel at 1600°C?
Al -
You are correct in that Al can be used to de-oxidise molten steel since it has a free energy lower than that
of the carbon + oxygen reaction but it is not the only addition that
could be used. Try again.
Al + Si - Correct. Both of these additions could
be used as their free energies of reaction are more negative than
the carbon + oxygen reaction.
