EMA 4324 Problem Set 8
KEY
41. [a] Plot schematically the polarization curve [Evans diagram] for
the anodic dissolution for the metal M which has the following
parameters/features: Ecorr = 0.500 volt v. SCE [saturated
calomel electrode, ESCE = 0.242 vol
EMA 4324 Problem Set 11
111 [Jones 65] Equal 1cm2 areas of metals P and Q are immersed together in sulfuric acid of unit H+
activity having no other dissolved oxidizers. Using the electrochemical parameters listed below:
material
P
Q
Eeq
0.5
0.6
io (
EMA 4324 Problem Set 2
21. [Jones 19] A carbon steel test specimen of dimensions 2inch by 3inch by 0.125inch with a
0.25inch diameter hole for suspending in solution is exposed for 120 hours in an acid solution and
loses 150 milligrams in weight. Ca
EMA 4324 Problem Set 7
71 [Jones 39] A copper valve is used in the waste exit line from a pharmaceutical process reactor
which is producing iodinecontaining organics. The waste stream is composed of airsaturated
15% sulfuric acid with the following im
EMA 4324 Problem Set 7
r or 0 u 1 c
g
l
36. Using appropriate polarization diagrams, determine the effect of the
following parameters on the corrosion potential and corrosion rate of
metal M corroding to M+ in an acid solution: [a] increasing jo of the
a
EMA 4324  Problem Set 12
121 [Callister [5th edition] For each of the metals listed below, compute the PillingBedworth ratio.
Also, on the basis of this value, specify whether or not you would expect the oxide scale that
forms on the surface to be prot
EMA 4324 Problem Set 10
101 [Jones 51] Plot the following cathodic polarization data for carbon steel in 0.5N H2 SO4 on linear
coordinates and determine the polarization resistance. From the shape of the plot, would you
estimate that the absolute value
EMA 4324  Problem Set 9
91 [Jones 49] Given activepassive alloys A and B having the following electrochemical parameters:
alloy
A
B
Ecorr, V
0.400
0.200
Icorr, A
1x106
7x107
A, V
0.1
0.1
Epp, V
0
0.3
Ipass, A
1x105
1x106
Etr, V
0.7
1.2
[a] Whi
Quiz 1
EMA 4324, LecSec 3009
Friday, September 3, 2004
KEY
1. [5 points] Two cubes of iron, each 1.000 cm on a side [AW(Fe) = 55.85 g/mol. (Fe) = 7.850
g/cm3 were placed in a beaker containing 1000 cm3 of stagnant seawater. After a week, one
specimen was
Quiz 2
EMA 4324, Stability of Materials, LecSec 3009
Friday, September 17, 2004
KEY
Thermodynamic data for the JRA  H2O system are presented on the following table.
substance
Free Energy of Formation, Go, cal/mol, 25oC
JRA(c)
0
JRA+2(s)
16,142
JRA(OH)2(
Quiz 3
EMA 4324, Stability of Materials, LecSec 3009
Monday, October 11, 2004
KEY
Electrochemical data for the JRA  H2O system are presented on the following table.
Tafel
constant,
, volts
+2
5
J + 2e = J
0.528
5x10
0.15
+
7
2H + 2e = H2
0.178
1x10
0
EMA 4324
LECTURE SECTION 3009
STABILITY OF MATERIALS
FALL SEMESTER 2004
Course Information and Syllabus
Course Objectives
1. to develop an understanding of what drives the deterioration of engineering materials  the
origins of instability  and what is n
Quiz 5
EMA 4324, Stability of Materials, LecSec 3009
Monday, November 22, 2004
KEY
Electrochemical data for the JRA  H2O system are presented on the following table:
Tafel
constant,
, volts
+2
7
J + 2e = J
0.528
5x10
0.15
15
O2 + 2H2O + 4e = 4OH
0.993
HW #5
Question #2
Jenny Poon
11/4/16
A unique application of photostability is its use in testing new drug substances
and products. According to FDA regulation1, the photostability standards are used in
(1) testing on the drug substance, (2) testing on th
EMA 4324
Fall 2016
Exam #2
Study Guide
Reading Assignments:
Class notes and related text in Jones (with support from other sources to meet your needs):
Oxidation Sec. 1.6 (relevant Sections of Jones Ch. 12)
Cathodic Protection Sec. 1.7 (relevant sections
EMA 4324
Fall 2016
Exam #1
Study Guide
Reading Assignments:
Class notes and related text in Jones (with support from other sources to meet your needs):
1.
2.
3.
4.
5.
6.
7.
Introduction to Stability (posted notes: Lecture 1)
Chemical Stability (Lecture 2)
EMA 4324 Problem Set 8
81 [Jones 41 [a] Plot schematically the polarization curve [Evans diagram] for the anodic dissolution
for the metal M which has the following parameters/features: Ecorr = 0.500 volt v. SCE [saturated
calomel electrode, ESCE = 0.2
EMA 4324 Problem Set 6
61 [Jones 36] Using appropriate polarization [Evans] diagrams, determine the effect of the following
parameters on the corrosion potential and corrosion rate [CPR] of metal M corroding to M+ in an
acid solution: [a] increasing jo
EMA 4324, SECTION 3009
FALL 2004, MWF 2nd period
READING
LECTURE
HOMEWORK
NUMBER
DATE
TOPIC
PROBLEMS
ASSIGNMENT
*
1
MONDAY
INTRODUCTION: IDENTIFICATION of COURSE SOURCING
AUGUST 23
MATERIALS, COURSE OBJECTIVES and METHODOLOGY
2
WEDNESDAY
AUGUST 25
OVERVIE
EMA 4324 Problem Set 1
11. [Jones II, 11 (modified)] Radial steel belted automobile tires are commonly constructed of rubber
reinforced with braided steel wire, each strand coated with copper. The copper is included to
enhance adhesion of the rubber tir
EMA 4324 Problem Set 2
KEY
19. A carbon steel test specimen of dimensions 2inch by 3inch by 0.125inch
with a 0.25inch diameter hole for suspending in solution is exposed for 120
hours in an acid solution and loses 150 milligrams in weight. Calculate
EMA 4324 Problem Set 3a
23. Assuming standard states for all reactants and products, determine the
spontaneous direction of the following reactions by calculating the cell
potential.
a. Cu + 2HCl = CuCl2 + H2
b. Fe + 2HCl = FeCl2 + H2
c. 2AgNO3 + Fe = Fe
EMA 4324 Problem Set 3a
2.3 Assuming standard states for all reactants and products,
determine the spontaneous direction of the following reactions
by calculating the cell potential (sic):
[a] Cu + 2HCl = CuCl2 + H2 [Cu + 2H+ = Cu+2 + H2]
*
Jones is reall
EMA 4324 Problem Set 3b
27. [Note that I have modified the problem in the textbook.] A specimen of iron
[Fe] is placed in an airsaturated NaCl solution of unknown concentration.
Solution pH is determined to be 1.0. Connecting the iron electrode to the
n
EMA 4324 Problem Set 3b
KEY
27. [Note that I have modified the problem in the textbook.] A
specimen of iron [Fe] is placed in an airsaturated NaCl solution of
unknown concentration. Solution pH is determined to be 1.0.
Connecting the iron electrode to t
EMA 4324 Problem Set 4
29. Construct the potentialpH diagram for zinc using the following
reactions and assuming the activity of all dissolved substances is
106. Assume any other reactions necessary to complete the
diagram using the diagram for aluminu
EMA 4324 Problem Set 5
1. A zinc specimen exposed to an acid solution loses 25 milligrams
during a 12 hour exposure. [a] What is the equivalent current flowing
due to corrosion? [b] If the specimen area is 200 cm2, what is the
corrosion rate in mils per y
EMA 4324 Problem Set 9
KEY
49. Given activepassive alloys A and B having the following
electrochemical parameters:
alloy
A
B
Ecorr, V
0.400
0.200
Icorr, A
1x106
7x107
A, V
0.1
0.1
Epp, V
0
0.3
Ipass, A
1x105
1x106
Etr, V
0.7
1.2
[a] Which will be
EMA 4324 Problem Set 10
51. Plot the following cathodic polarization data for carbon steel in
0.5N H2SO4 on linear coordinates and determine the polarization
resistance. From the shape of the plot, would you estimate that
the absolute value of A is great
EMA 4324 Problem Set 11
65. Equal 1cm2 areas of metals P and Q are immersed together in
sulfuric acid of unit H+ activity having no other dissolved oxidizers.
Using the electrochemical parameters listed below:
material
P
Q
Eeq
0.5
0.6
io(A)
3x107
2x1
Exam #1
Exam #1: Some covered topics
1. MSE Review
Fundamental knowledge
Modes of failure (creep vs. fatigue)

Creep: failure when static stress produces timedependent permanent (plastic) deformation
o
Important for longservice life (i.e. implants)
F