高速列车用聚氨酯面漆耐蚀性能和老化机制研究
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李春霖, 史洪微, 梁国平, 李丽, 王浩, 王伟, 刘福春, 韩恩厚
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Corrosion Resistance and Aging Mechanism of Polyurethane Topcoat for High-speed Train
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LI Chunlin, SHI Hongwei, LIANG Guoping, LI Li, WANG Hao, WANG Wei, LIU Fuchun, HAN En-Hou
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表1 聚氨酯面漆/铝合金体系浸泡在3.5%NaCl溶液中的EIS拟合结果
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Table 1 Fitting results of EIS of polyurethane topcoat/aluminum alloy system immersed in 3.5%NaCl solution for different time
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| Immersion time / h | Rc Ω·cm2 | Cc | Rct Ω·cm2 | Cdl | Rsf Ω·cm2 | Csf |
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| Y0/S·sa·cm2 | a0 | Y1/S·sa·cm2 | a1 | Y2/S·sa·cm2 | a2 |
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| 0.5 | 1.32×1011 | 6.63×10-11 | 9.34×10-1 | / | / | / | / | / | / | | 72 | 8.32×1011 | 5.40×10-11 | 9.53×10-1 | / | / | / | / | / | / | | 240 | 1.52×1012 | 4.97×10-11 | 9.60×10-1 | / | / | / | / | / | / | | 384 | 1.04×1012 | 4.98×10-11 | 9.59×10-1 | 3.63×105 | 5.70×10-12 | 8.00×10-1 | / | / | / | | 600 | 2.13×1010 | 4.66×10-11 | 9.67×10-1 | 4.46×106 | 1.86×10-11 | 9.31×10-1 | / | / | / | | 1200 | 1.14×1010 | 4.27×10-11 | 9.74×10-1 | 1.05×104 | 6.04×10-12 | 1.00×100 | / | / | / | | 1560 | 7.27×109 | 4.74×10-11 | 9.65×10-1 | 1.15×1012 | 6.60×10-11 | 6.58×10-1 | / | / | / | | 1900 | 3.32×107 | 4.41×10-11 | 9.71×10-1 | 6.15×108 | 4.83×10-11 | 8.35×10-1 | 2.6×1010 | 1.00×10-9 | 7.14×10-1 | | 2160 | 3.09×107 | 4.25×10-11 | 9.75×10-1 | 5.02×108 | 4.18×10-11 | 8.71×10-1 | 2.45×109 | 1.27×10-9 | 6.93×10-1 |
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