A sizeable number of structures, as key load-bearing components, are currently being made using both high-strength and medium-strength alloys of aluminum. During their service life, these alloys are often exposed to environments spanning a range of aggressiveness. In this study, the corrosion behavior of a high-strength aluminum alloy in both static and flowing saline solution was conducted using both experimental and numerical analysis. The damage resulting from environment-induced degradation, or corrosion, of the test specimens upon exposure to flowing saline solution was noticeably severe in comparison with the damage caused by exposure to static saline solution. Subsequent to flow-induced degradation, an analysis of dispersion of the corrosion products over the surface revealed it to be in the direction of flowing saline solution. The higher the flow rate of saline solution over the sample surface, the more severe and visibly evident was the severity of damage due to environment-induced degradation. Microscopic observations of the corrosion morphology for the three different flow rates revealed a greater degree of damage to the surface with an increase in flow rate of the saline solution. This can be quantified by both an increase in area of the sample that is degraded and depth of the corrosion-induced pits. Using cellular automata algorithm in conjunction with matlab software, the damage caused by flowing saline solution for three different flow rates predicted fairly accurately the severity of the environment-induced damage due to corrosion and resultant morphology of the corrosion-related debris.

References

References
1.
ASM
,
2010
,
ASM Metals Hand Book
, Vol.
1
,
American Society for Materials International
,
Materials Park, OH
.
2.
Askeland
,
D. R.
, and
Wright
,
W. J.
,
2016
,
The Science and Engineering of Materials
,
7th ed.
,
Cengage Learning
,
Boston, MA
.
3.
Wang
,
J.
,
Giridharan
,
V.
,
Shanov
,
V.
,
Xu
,
Z.
,
Collins
,
B.
,
White
,
L.
,
Jang
,
Y.
,
Sankar
,
J.
,
Huang
,
N.
, and
Yun
,
Y.
,
2014
, “
Flow-Induced Corrosion Behavior of Absorbable Magnesium-Based Stents
,”
Acta Biomater.
,
12
, pp.
5213
5223
.
4.
Lv
,
S.-L.
,
Cui
,
Y.
,
Gao
,
X.
, and
Srivatsan
,
T. S.
,
2013
, “
Influence of Exposure to Aggressive Environment on Fatigue Behavior of a Shot Peened High Strength Aluminum Alloy
,”
Mater. Sci. Eng.: A
,
574
, pp.
243
252
.
5.
Lv
,
S.
,
Cu
,
Y.
,
Zhang
,
W.
,
Tong
,
X.
,
Srivatsan
,
T. S.
, and
Gao
,
X.
,
2013
, “
Influence of Shot Peening on Failure of an Aluminum Alloy Exposed to Aggressive Aqueous Environments
,”
J. Mater. Eng. Perform.
,
22
(
6
), pp.
1735
1743
.
6.
Yong
,
X.
, and
Lin
,
Y.
,
2002
, “
Progress in Study on Flow-Induced Corrosion
,”
J. Corros. Sci. Prot. Technol.
,
14
(
1
), pp.
32
34
.
7.
Jafarzadeh
,
K.
, and
Shahrabi
,
T.
,
2007
, “
Role of Chloride Ion and Dissolved Oxygen in Electrochemical Corrosion of AA5083-H321 Aluminum-Magnesium Alloy in NaCl Solutions Under Flow Conditions
,”
J. Mater. Sci. Technol.
,
23
(
5
), pp.
623
628
.
8.
Sydberger
,
T.
,
1987
, “
Flow Dependent Corrosion: Mechanisms, Damage, Characteristics and Control
,”
J. Br. Corros.
,
22
(
2
), pp.
83
88
.
9.
Wang
,
Y.
,
2005
, “
Corrosion Behavior of Aluminum Alloy in Flowing Seawater
,”
Equip. Environ. Eng.
,
2
(
6
), pp.
72
76
.
10.
Sun
,
T.
,
2010
, “
The Study of Flow Corrosion Performance in the Seawater for Copper and Copper Nickel Alloy
,” Ph.D. dissertation, Nanjing University of Aeronautics and Astronautics, Jiangsu, China.
11.
Karimi
,
A.
, and
Leo
,
W. R.
,
1987
, “
Phenomenological Model for Cavitation Erosion Rate Computation
,”
Mater. Sci. Eng.
,
95
, pp.
1
14
.
12.
Dean
,
S. W.
,
1990
, “
Velocity-Accelerated Corrosion Testing and Predictions
,”
J. Mater. Perform.
,
29
(
9
), pp.
61
67
.
13.
Lin
,
Z.
,
2009
, “
The Study of Corrosion Behavior of Ferroalloy in Flowing Sea Water
,” Master's thesis, Dalian University of Technology, Ganjingzi, China.
14.
Lotz
,
U.
,
1990
, “
Velocity Effects in Flow Induced Corrosion
,” Corrosion'90, NACE International, Houston, TX, Paper No. 27.
15.
Efird
,
K. D.
,
1977
, “
Effect of Fluid Dynamics on the Corrosion of Copper-Base Alloys in Seawater
,”
Corrosion
,
33
(
1
), pp.
3
8
.
16.
Wharton
,
J. A.
, and
Wood
,
R. J. K.
,
2004
, “
Influence of Flow Conditions on the Corrosion of AISI 304L Stainless Steel
,”
Wear
,
256
(
5
), pp.
525
536
.
17.
Liu
,
J.
,
Lin
,
Y.
, and
Li
,
X.
,
2004
, “
Application of Numerical Simulation to Flow Induced Corrosion in Flowing Seawater System
,”
Anti-Corr. Meth. Mater.
,
52
(5), pp.
276
279
.
18.
Zhang
,
Z.
, and
Cheng
,
X.
,
2000
, “
Numerical Simulation of Erosion-Corrosion in the Liquid Solid Two-Phase Flow
,”
Chin. J. Chem. Eng.
,
8
(
4
), pp.
347
355
.
19.
Liu
,
J.
,
2007
, “
Numerical Simulation of Flow-Induced Corrosion of Metals in High Flow Multiphase Seawater and Test Verification
,” M.S. thesis, Beijing University of Chemical Technology, Chaoyang, China.
20.
Shi
,
Y.
, and
Liang
,
P.
,
2013
, “
The Corrosion Behavior of Q235 and Q345 Steel in Simulated Seawater
,”
J. Liaoning Univ. Pet. Chem. Ind.
,
33
(
1
), pp.
5
8
.
21.
Li
,
L.
, and
Yu
,
S.
,
2008
, “
Corrosion Electrochemical Behavior of AZ31 and AZ61 Magnesium Alloys in Simulated Sea Water
,”
J. Electrochem.
,
14
(
1
), pp.
95
99
.
22.
Postlethwaite
,
J.
, and
Nesic
,
S.
,
1993
, “
Erosion in Disturbed Liquid/Particle Pipe Flow: Effects of Flow Geometry and Particle Surface Roughness
,”
Corrosion
,
49
(
10
), pp.
850
857
.
23.
Wang
,
H.
, and
Lv
,
G.
,
2008
, “
The Cellular Automata Simulation for Metal Surface Corrosion Damage Evolution Process
,”
J. Aeronaut.
,
29
(
6
), pp.
1490
1496
.
You do not currently have access to this content.