Corrosion Behavior and Surface Properties of PVD Coatings for Mold Technology Applications
Abstract
:1. Introduction
2. Materials and Methods
2.1. Steel and Coatings
2.2. Hardness and Roughness Measurements
2.3. Coating Adhesion
2.4. Scanning Electron Microscopy
2.5. Corrosion Experiments
3. Results and Discussion
3.1. Hardness and Roughness
3.2. Scratch Test
3.3. Scanning Electron Microscopy
3.4. Corrosion Behavior
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Coating | Type | Deposition Temperature (°C) | Deposition Pressure (kg/m·s2) |
---|---|---|---|
CrN/Cr | Multilayer (4 layers) | 350 | 1.5 |
CrN/Nb | Multilayer (4 layers) | 350 | 2.5 |
AlTiN | Multilayer (8 layers) | 450 | 1.5 |
TiN | Single layer | 450 | 1.5 |
ZrN | Single layer | 450 | 1.5 |
Coating | H (HV0.025/10) | H (HV0.1/10) | R (Ra, nm) | LcI (N) |
---|---|---|---|---|
CrN/Cr | 1736 ± 37 | 1042 ± 50 | 16 ± 8 | 10 ± 2 |
CrN/Nb | 1440 ± 75 | 1130 ± 30 | 46 ± 6 | 5 ± 1 |
AlTiN | 2758 ± 160 | 2116 ± 60 | 50 ± 10 | 16 ± 2 |
TiN | 649 ± 40 | 452 ± 25 | 50 ± 10 | 13 ± 4 |
ZrN | 1516 ±1 70 | 1331 ± 30 | 75 ± 5 | 11 ± 2 |
Coating | Thickness (µm) |
---|---|
CrN/Cr | 1.0–1.5 |
CrN/Nb | 1.5–2.0 |
AlTiN | 1.5–2.0 |
TiN | 0.5–1.0 |
ZrN | 3.0–3.5 |
Coating | Ecorr (V) in 0.1 M Na2SO4 | Ecorr (V) in 0.1 M NaCl |
---|---|---|
Steel substrate | −0.622 | −0.521 |
CrN/Cr | −0.089 | 0.050 |
CrN/Nb | −0.214 | −0.194 |
AlTiN | −0.028 | −0.319 |
TiN | −0.022 | −0.253 |
ZrN | −0.150 | −0.314 |
Coating | Ecorr (V) | Eprot (V) | Eb (V) | ip (A/cm2) |
---|---|---|---|---|
AlTiN | −0.28 × 10−1 | 0.39 | 1.35 | 5.73 × 10−8 |
TiN | −0.22 × 10−1 | 0.56 | 1.37 | 1.40 × 10−8 |
CrN/Cr | −0.89 × 10−1 | 0.75 | 0.60 | 7.09 × 10−8 |
CrN/Nb | −0.21 | −0.63 | 0.65 | 8.62 × 10−7 |
ZrN | −0.15 | 0.05 | >1.4 | 9.78 × 10−7 |
Steel | −0.62 | −0.72 | – | – |
Coating | Ecorr (V) | Eprot (V) | Eb (V) | ip (A/cm2) |
---|---|---|---|---|
AlTiN | −0.32 | −0.31 | 0.85 | 1.55 × 10−7 |
TiN | −0.25 | −0.52 | 1.1 | 8.45 × 10−6 |
CrN/Cr | 0.5 × 10−2 | −0.55 | 0.5 | 6.23 × 10−8 |
CrN/Nb | −0.19 | −0.25 | 1.3 | 4.64 × 10−8 |
ZrN | −0.31 | −0.6 | 0.5 × 10−1 | 4.76 × 10−6 |
Steel | −0.52 | −0.62 | – | – |
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D'Avico, L.; Beltrami, R.; Lecis, N.; Trasatti, S.P. Corrosion Behavior and Surface Properties of PVD Coatings for Mold Technology Applications. Coatings 2019, 9, 7. https://doi.org/10.3390/coatings9010007
D'Avico L, Beltrami R, Lecis N, Trasatti SP. Corrosion Behavior and Surface Properties of PVD Coatings for Mold Technology Applications. Coatings. 2019; 9(1):7. https://doi.org/10.3390/coatings9010007
Chicago/Turabian StyleD'Avico, Luigi, Ruben Beltrami, Nora Lecis, and Stefano P. Trasatti. 2019. "Corrosion Behavior and Surface Properties of PVD Coatings for Mold Technology Applications" Coatings 9, no. 1: 7. https://doi.org/10.3390/coatings9010007
APA StyleD'Avico, L., Beltrami, R., Lecis, N., & Trasatti, S. P. (2019). Corrosion Behavior and Surface Properties of PVD Coatings for Mold Technology Applications. Coatings, 9(1), 7. https://doi.org/10.3390/coatings9010007