Essentials Of Materials Science And Engineering
Essentials Of Materials Science And Engineering
4th Edition
ISBN: 9781337385497
Author: WRIGHT, Wendelin J.
Publisher: Cengage,
Question
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Chapter 18, Problem 18.41P
Interpretation Introduction

Interpretation:

The temperature at which the iron can be held at given oxidation rate should be identified.

Concept introduction:

  • Oxidation processes in which materials react with oxygen and other gases.
  • Oxidation occurred in metal is given by standard free energy of formation for oxide.
  • Pilling Bed worth ratio is the ratio of oxide volumes per metal to the metal volume per metal.
  • If oxide occupies lesser volume than metal, the Pilling − Bed worth ratio is less than one.

According to Arrhenius equation, temperature oxidation can be calculated,

Rate = A exp Q1.987t1

where, rate = rate of oxidation

A = constant

Q = heat generated

  t1 = temperature.

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