Abstract
TiSiC coatings alloyed with Zr and Cr were deposited on Si and 316 L steel substrates by a cathodic arc method in a CH4 reactive atmosphere. The corrosion and wear behavior of the coatings in 0.9% NaCl solution was investigated. Corrosion resistance of the coatings was evaluated by electrochemical tests. The electrochemical polarization measurements were conducted at room temperature in the potential range −1 and 1.5 V, with a 0.167 mVs−1 scan rate. Compared to the uncoated 316 L substrates, the coated ones showed nobler characteristics, with more electropositive corrosion potentials, lower corrosion current densities, and higher polarization resistances. TiSiC-Zr exhibited the lowest corrosion current density (0.62 μAcm−2) and the highest protection efficiency (69.5%). The tribological performance of the coatings under corrosive conditions (0.9% NaCl solution) was investigated using a ball-on-disc tribometer (6-mm-diameter sapphire ball, 5 N load, 0.15 ms−1 sliding speed, 400 m sliding distance). The TiSiC-Cr coating demonstrated the best wear behavior, with a wear rate of 3.2 × 10−6 mm3N−1m−1, followed by TiSiC and TiSiC-Zr. The morphologies and compositions of the worn surfaces were examined by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) in order to identify the wear mechanism. Corrosion, debris adhesion, and oxidation were found to be the dominant wear processes.
| Original language | English |
|---|---|
| Pages (from-to) | 72-79 |
| Number of pages | 8 |
| Journal | Tribology Transactions |
| Volume | 59 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2 Jan 2016 |
| Externally published | Yes |
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Keywords
- Carbides
- cathodic arc deposition
- electrochemical measurements
- tribological characteristics
- X-ray diffraction
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Surfaces and Interfaces
- Surfaces, Coatings and Films
Cite this
TiSiC, TiSiC-Zr, and TiSiC-Cr Coatings—Corrosion Resistance and Tribological Performance in Saline Solution. / Parau, A. C.; Vitelaru, C.; Balaceanu, M.; Braic, V.; Constantin, L. R.; Braic, M.; Vladescu, A.
In: Tribology Transactions, Vol. 59, No. 1, 02.01.2016, p. 72-79.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - TiSiC, TiSiC-Zr, and TiSiC-Cr Coatings—Corrosion Resistance and Tribological Performance in Saline Solution
AU - Parau, A. C.
AU - Vitelaru, C.
AU - Balaceanu, M.
AU - Braic, V.
AU - Constantin, L. R.
AU - Braic, M.
AU - Vladescu, A.
PY - 2016/1/2
Y1 - 2016/1/2
N2 - TiSiC coatings alloyed with Zr and Cr were deposited on Si and 316 L steel substrates by a cathodic arc method in a CH4 reactive atmosphere. The corrosion and wear behavior of the coatings in 0.9% NaCl solution was investigated. Corrosion resistance of the coatings was evaluated by electrochemical tests. The electrochemical polarization measurements were conducted at room temperature in the potential range −1 and 1.5 V, with a 0.167 mVs−1 scan rate. Compared to the uncoated 316 L substrates, the coated ones showed nobler characteristics, with more electropositive corrosion potentials, lower corrosion current densities, and higher polarization resistances. TiSiC-Zr exhibited the lowest corrosion current density (0.62 μAcm−2) and the highest protection efficiency (69.5%). The tribological performance of the coatings under corrosive conditions (0.9% NaCl solution) was investigated using a ball-on-disc tribometer (6-mm-diameter sapphire ball, 5 N load, 0.15 ms−1 sliding speed, 400 m sliding distance). The TiSiC-Cr coating demonstrated the best wear behavior, with a wear rate of 3.2 × 10−6 mm3N−1m−1, followed by TiSiC and TiSiC-Zr. The morphologies and compositions of the worn surfaces were examined by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) in order to identify the wear mechanism. Corrosion, debris adhesion, and oxidation were found to be the dominant wear processes.
AB - TiSiC coatings alloyed with Zr and Cr were deposited on Si and 316 L steel substrates by a cathodic arc method in a CH4 reactive atmosphere. The corrosion and wear behavior of the coatings in 0.9% NaCl solution was investigated. Corrosion resistance of the coatings was evaluated by electrochemical tests. The electrochemical polarization measurements were conducted at room temperature in the potential range −1 and 1.5 V, with a 0.167 mVs−1 scan rate. Compared to the uncoated 316 L substrates, the coated ones showed nobler characteristics, with more electropositive corrosion potentials, lower corrosion current densities, and higher polarization resistances. TiSiC-Zr exhibited the lowest corrosion current density (0.62 μAcm−2) and the highest protection efficiency (69.5%). The tribological performance of the coatings under corrosive conditions (0.9% NaCl solution) was investigated using a ball-on-disc tribometer (6-mm-diameter sapphire ball, 5 N load, 0.15 ms−1 sliding speed, 400 m sliding distance). The TiSiC-Cr coating demonstrated the best wear behavior, with a wear rate of 3.2 × 10−6 mm3N−1m−1, followed by TiSiC and TiSiC-Zr. The morphologies and compositions of the worn surfaces were examined by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) in order to identify the wear mechanism. Corrosion, debris adhesion, and oxidation were found to be the dominant wear processes.
KW - Carbides
KW - cathodic arc deposition
KW - electrochemical measurements
KW - tribological characteristics
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=84958842154&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84958842154&partnerID=8YFLogxK
U2 - 10.1080/10402004.2015.1077406
DO - 10.1080/10402004.2015.1077406
M3 - Article
AN - SCOPUS:84958842154
VL - 59
SP - 72
EP - 79
JO - Tribology Transactions
JF - Tribology Transactions
SN - 1040-2004
IS - 1
ER -