Chinese Journal of Lasers, Volume. 51, Issue 12, 1202204(2024)
Corrosion Resistance of 2024‑T351 Aluminum Alloy Processed by Laser Peening Without Coating
Figures & Tables(16)
Fig. 1. Schematics of LPwC experiment. (a) Experimental device; (b) experimental scheme
Fig. 3. Surface morphology of different samples. (a)(b) L-0; (c)(d) L-1; (e)(f) L-2
Fig. 5. Cross-sectional morphologies of different samples. (a)(b) L-0; (c)(d) L-1; (e)(f) L-2
Fig. 6. Grain distributions of different samples along depth direction. (a) L-0; (b) L-1; (c) L-2
Fig. 7. X-ray diffraction patterns. (a) X-ray diffraction patterns of different samples; (b) partial magnification of XRD patterns near 44°
Fig. 9. Electrochemical curves of different samples. (a) Potentiodynamic polarization curves; (b) Nyquist curves
Fig. 10. Surface morphologies of different samples after electrochemical corrosion experiment. (a)(b) L-0; (c)(d) L-1; (e)(f) L-2
Fig. 11. Schematics of corrosion resistance mechanism. (a) Before LPwC; (b) after LPwC
Table 1. Chemical compositions of 2024-T351 aluminum alloy
View tableTable 1. Chemical compositions of 2024-T351 aluminum alloy
Element Cu Mg Si Fe Mn Zn Cr Ti Al Mass fraction /% 3.80‒4.90 1.20‒1.80 0.50 0.50 0.30‒0.90 0.25 0.10 0.15 Bal.
Table 2. Element content of each region in Fig. 5
View tableTable 2. Element content of each region in Fig. 5
Area Mass fraction /% O Cu Mg Si Fe Mn Al Area 1 0.96 2.82 1.93 0.32 0.28 0.55 93.14 Area 2 9.11 2.17 1.68 0.26 0.33 0.49 85.96 Area 3 10.67 2.39 1.71 0.12 0.27 0.23 84.61
Table 3. Grain size statistical result
View tableTable 3. Grain size statistical result
Sample Grain size /μm Average /μm D1 D2 D3 L-0 82.17 77.68 79.64 79.83 L-1 58.56 59.93 62.23 60.14 L-2 48.58 51.65 48.91 49.71
Table 4. Polarization parameters of different samples
View tableTable 4. Polarization parameters of different samples
Sample Ecorr /V icorr /（A·cm-2） L-0 -1.12 2.83×10-5 L-1 -0.97 7.63×10-7 L-2 -1.11 4.35×10-6
Table 5. Equivalent circuit fitted results of different samples
View tableTable 5. Equivalent circuit fitted results of different samples
Sample Rs /
（Ω·cm2）
Qdl /
（Ω-1·cm-2·Sn）
n Cdl /
（F·cm-2）
Rct /
（kΩ·cm2）
L-0 6.69 1.59×10-4 0.78 1.45×10-4 4.59 L-1 51.57 1.87×10-5 0.65 1.39×10-5 31.04 L-2 32.65 1.66×10-5 0.63 9.61×10-6 23.78
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Xuefeng Xia, Jianzhong Zhou, Yanqiang Gou, Lei Huang, Xiankai Meng, Shu Huang. Corrosion Resistance of 2024‑T351 Aluminum Alloy Processed by Laser Peening Without Coating[J]. Chinese Journal of Lasers, 2024, 51(12): 1202204
Paper Information
Category: Laser Surface Machining
Received: Jun. 19, 2023
Accepted: Sep. 11, 2023
Published Online: Feb. 19, 2024
The Author Email: Zhou Jianzhong (zhoujz@ujs.edu.cn)
CSTR:32183.14.CJL230923
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