Answered: d) By using the data provided below,…

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter13: Electrochemistry

Section: Chapter Questions

Problem 13.103PAE

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(d) By using the data provided below, calculate the PillingBedworth ratio for the nickel (Ni) – nickel oxide (NiO) system and determine whether NiO is protective against corrosion.

Atomic mass of nickel = 58.7 g.mol-1

Density of nickel = 8.91 Mg.m-3

Molecular mass of nickel oxide = 74.7 g.mol-1

Density of nickel oxide = 6.67 Mg.m-3

(e) A stainless steel pressure vessel that has fracture toughness, K1C, of 197 MN.m-3/2 is going to be exposed to a stress of 398 MN.m-2 . By using this information explain how designers can determine the thickness of the vessel so that catastrophic failure can be avoided.

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