Microstructural and Corrosion Properties of PEO Coated Zinc-Aluminized (ZA) Steel
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Microstructural Characterization
3.2. Corrosion Resistance
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Sample | ZA Layer Thickness (µm) | PEO Layer Thickness (µm) | |
---|---|---|---|
Sample treated at 1.1 A/cm2 | 2 min | 25 ± 2 | 7-Not Uniform |
3 min | 20 ± 2 | 10 ± 3 | |
Sample treated at 1.7 A/cm2 | 2 min | 15 ± 1 | 22 ± 3 |
3 min | 11 ± 3 | 30 ± 1 | |
Sample treated at 2.3 A/cm2 | 2 min | 12 ± 3 | 25 ± 1 |
3 min | 7 ± 1 | 40 ± 2 |
Sample and Zone | Al% | Si% | Zn% | O% | ||
---|---|---|---|---|---|---|
1.1 A/cm2 | 2 min | ZA layer (1) light grey areas | 74 | - | 26 | - |
ZA layer (1) dark grey areas | 65 | - | 15 | 20 | ||
PEO layer (2) | 60 | 4 | 16 | 20 | ||
3 min | ZA layer (1) light grey areas | 76 | - | 24 | - | |
ZA layer (1) dark grey areas | 67 | - | 13 | 20 | ||
PEO layer (2) | 18 | 39 | 4 | 39 | ||
2.3 A/cm2 | 2 min | ZA layer (1) light grey areas | 74 | - | 26 | |
ZA layer (1) dark grey areas | 65 | - | 17 | 18 | ||
PEO layer (2) | 14 | 33 | - | 53 | ||
3 min | ZA layer (1) light grey areas | 75 | - | 25 | - | |
ZA layer (1) dark grey areas | 65 | - | 16 | 19 | ||
PEO layer (2) | 18 | 29 | 2 | 51 |
Parameter | ZA | 1.1 A/cm2 | 1.7 A/cm2 | 2.3 A/cm2 | |||
---|---|---|---|---|---|---|---|
2 min | 3 min | 2 min | 3 min | 2 min | 3 min | ||
R1 (Ω·cm2) | 31.2 | 15.1 | 50.2 | 50.5 | 50.2 | 40.2 | 50.4 |
R2 (Ω·cm2) | - | 341.8 | 8006 | 51.2 | 15.1 | 1668 | 100.1 |
R3 (Ω·cm2) | 77.5 | 1827 | 12,253 | 3241 | 908.4 | 10,241 | 1023 |
Q1 (FHz1−n) | - | 3.1 × 10−4 | 3.6 × 10−6 | 4.8 × 10−4 | 3.6 × 10−6 | 1.7 × 10−5 | 1.5 × 10−4 |
Q2 (FHz1−n) | 5.1 × 10−5 | 5.2 × 10−4 | 3.7 × 10−4 | 3.8 × 10−4 | 3.7 × 10−4 | 9.3 × 10−5 | 5.1 × 10−4 |
n1 | - | 0.5 | 0.9 | 0.8 | 0.9 | 0.6 | 0.5 |
n2 | 0.7 | 0.8 | 0.5 | 0.6 | 0.5 | 0.4 | 0.6 |
Chi-squared | 0.001 | 0.002 | 0.006 | 0.02 | 0.006 | 0.002 | 0.003 |
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Pezzato, L.; Settimi, A.G.; Cerchier, P.; Gennari, C.; Dabalà, M.; Brunelli, K. Microstructural and Corrosion Properties of PEO Coated Zinc-Aluminized (ZA) Steel. Coatings 2020, 10, 448. https://doi.org/10.3390/coatings10050448
Pezzato L, Settimi AG, Cerchier P, Gennari C, Dabalà M, Brunelli K. Microstructural and Corrosion Properties of PEO Coated Zinc-Aluminized (ZA) Steel. Coatings. 2020; 10(5):448. https://doi.org/10.3390/coatings10050448
Chicago/Turabian StylePezzato, Luca, Alessio Giorgio Settimi, Pietrogiovanni Cerchier, Claudio Gennari, Manuele Dabalà, and Katya Brunelli. 2020. "Microstructural and Corrosion Properties of PEO Coated Zinc-Aluminized (ZA) Steel" Coatings 10, no. 5: 448. https://doi.org/10.3390/coatings10050448