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A linear creep law is observed in an experiment on an alloy at high temperatures. Over time, the steady-state creep rate is observed to decrease. Briefly explain why. (b) Stainless steels are good high-temperature alloys because of the protection against oxidation provided by the passive oxide layer (Cr2O3). At high temperatures, Cr reacts with the Fe3C to form Cr23C6. What effect might this have on the corrosion resistance

Sagot :

The reaction of Chromium with the Fe3C to form Cr23C6 at high temperature decreases the corrosion resistance of alloys.

Stainless steels are most commonly used for their corrosion resistance. The presence of high chromium content is so beneficial to the wet corrosion resistance of stainless steel. It is also highly beneficial to their high temperature strength and resistance to increasing temperatures.

At high temperature, Chromium reacts with the Fe3C produces Cr23C6 which decreases the corrosion resistance of alloys so we can conclude that decrease occur in the corrosion resistance when the Chromium reacts with the Fe3C at high temperature.

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