In this study, the effect of flow velocity (4–7.5 m s−1) and impact angle (30–90 deg) on erosion–corrosion behavior of chromium carbide coating was investigated under impingement by silica containing NaCl solution. Chromium carbide coating was deposited on low carbon steel by thermal reactive deposition/diffusion method at 1050 °C for 12 h in a molten salt bath. Mass loss measurement and potentiodynamic polarization tests were employed in order to determine coating performance under impingement. Polarization curves showed that the coated samples had less corrosion current density and high chemical stability. High mass loss at low impact angle indicated ductile behavior for the uncoated sample, while the mass loss for the coated sample changes less than 30% with impact angle up to 60 deg. Furthermore, the erosion–corrosion behavior of the coated sample was slightly dependent on flow velocity. Scanning electron micrographs showed that at lower impact angle, the Cr7C3 coating eroded with flake fragmentation mechanism, while at high impact angle, fatigue fracture is the main degradation mechanism.
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Effect of Flow Velocity and Impact Angle on Erosion–Corrosion Behavior of Chromium Carbide Coating
A. R. Hemmati,
A. R. Hemmati
Centre of Excellence for High Strength
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Alireza_Hemmati.1990@yahoo.com
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Alireza_Hemmati.1990@yahoo.com
Search for other works by this author on:
M. Soltanieh,
M. Soltanieh
Centre of Excellence for High Strength
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Mansour_Soltanieh@iust.ac.ir
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Mansour_Soltanieh@iust.ac.ir
Search for other works by this author on:
S. M. Masoudpanah
S. M. Masoudpanah
Centre of Excellence for High Strength
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Masoodpanah@iust.ac.ir
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Masoodpanah@iust.ac.ir
Search for other works by this author on:
A. R. Hemmati
Centre of Excellence for High Strength
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Alireza_Hemmati.1990@yahoo.com
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Alireza_Hemmati.1990@yahoo.com
M. Soltanieh
Centre of Excellence for High Strength
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Mansour_Soltanieh@iust.ac.ir
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Mansour_Soltanieh@iust.ac.ir
S. M. Masoudpanah
Centre of Excellence for High Strength
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Masoodpanah@iust.ac.ir
Alloys Technology,
School of Metallurgy and Materials Engineering,
Iran University of Science and Technology,
Narmak,
Tehran 16844, Iran
e-mail: Masoodpanah@iust.ac.ir
1Corresponding author.
Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received April 9, 2016; final manuscript received August 7, 2016; published online November 30, 2016. Assoc. Editor: Dae-Eun Kim.
J. Tribol. May 2017, 139(3): 031303 (5 pages)
Published Online: November 30, 2016
Article history
Received:
April 9, 2016
Revised:
August 7, 2016
Citation
Hemmati, A. R., Soltanieh, M., and Masoudpanah, S. M. (November 30, 2016). "Effect of Flow Velocity and Impact Angle on Erosion–Corrosion Behavior of Chromium Carbide Coating." ASME. J. Tribol. May 2017; 139(3): 031303. https://doi.org/10.1115/1.4034424
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