Influence of Aging on Corrosion Behaviour of the 6061 Cast Aluminium Alloy
Abstract
:1. Introduction
2. Experiment
2.1. Materials
2.2. Heat-Treatment Procedures and Hardness Testing
2.3. Corrosion Testing
2.3.1. Electrochemical Corrosion Testing
2.3.2. In Situ Observation by Confocal Laser Scanning Microscopy
2.4. Transmission Electron Microscopy (TEM) Measurements
2.5. Scanning Kelvin Probe Force Microscopy (SKPFM) Measurements
2.5.1. Sample Preparation
2.5.2. Testing Parameters
2.6. Electron Probe Microanalysis (EPMA)
3. Results
3.1. Electrochemical Behaviour in 3.5% NaCl Solution
3.2. Mg2Si Phase Characterization under Different Aged Times
3.2.1. Age-Hardening Behaviour
3.2.2. TEM Investigation
3.3. AlFeSi Phase Characterization
3.4. SKPFM-Measured Volta Potential Map
3.5. In Situ Observation by Confocal Laser Scanning Microscopy
3.6. EPMA Element Distribution Characterisation
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Aging Time (h) | Ecorr (V) | icorr (μA/cm2) | βa (mV) | βc (mV) | Corrosion Rate (mm/a) |
---|---|---|---|---|---|
0 | −1.079 | 24.395 | 174.241 | 78.745 | 0.744 |
1 | −1.049 | 24.340 | 326.920 | 84.048 | 0.743 |
2 | −1.087 | 28.385 | 235.262 | 92.201 | 0.866 |
3 | −1.051 | 29.491 | 172.450 | 90.886 | 0.900 |
4 | −1.032 | 31.576 | 244.220 | 76.776 | 0.963 |
5 | −1.045 | 34.239 | 198.951 | 83.748 | 1.045 |
14 | −1.029 | 34.723 | 232.833 | 84.178 | 1.059 |
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He, T.; Shi, W.; Xiang, S.; Huang, C.; Ballinger, R.G. Influence of Aging on Corrosion Behaviour of the 6061 Cast Aluminium Alloy. Materials 2021, 14, 1821. https://doi.org/10.3390/ma14081821
He T, Shi W, Xiang S, Huang C, Ballinger RG. Influence of Aging on Corrosion Behaviour of the 6061 Cast Aluminium Alloy. Materials. 2021; 14(8):1821. https://doi.org/10.3390/ma14081821
Chicago/Turabian StyleHe, Ting, Wei Shi, Song Xiang, Chaowen Huang, and Ronald G. Ballinger. 2021. "Influence of Aging on Corrosion Behaviour of the 6061 Cast Aluminium Alloy" Materials 14, no. 8: 1821. https://doi.org/10.3390/ma14081821