CSSA Trial question 2004 (1 Viewer)

[Jaserius]

"Account for the fact that the composition of steel alloys can determine its properties such as corrosion resistance."

I know that steel alloys can be corrosion resistant when you add certain metals to them, but WHY!?

Thankyou.

 

[Casmira]

because the metals added (ie. chromium to steel) are more resistant to corrossion (usually because they are inert more inert)

 

[nanashi]

it depends on the reactivity of the metals that have been added

 

[beastinator]

it is because the metals added to the alloy often form a passivating layer over the surface of the steel (e.g chromium, nickel). the best example of a passivating metal i can think of is aluminium (forms an aluminium oxide coating which creates high resistance to corrosion) however this is NOT used in the production of corrosion resistant steel alloys.