胡明涛,鞠鹏飞,左禹,唐聿明,赵旭辉,亓丽丽.模拟海洋大气环境下铝合金表面锌黄环氧底漆/丙烯酸聚氨酯面漆涂层体系失效过程研究[J].表面技术,2018,47(5):57-62.
HU Ming-tao,JU Peng-fei,ZUO Yu,TANG Yu-ming,ZHAO Xu-hui,QI Li-li.Failure Process of Zinc Yellow Epoxy/ Acrylic Polyurethane Composite Coating for Aluminum Alloy under Simulated Marine Environment[J].Surface Technology,2018,47(5):57-62 |
| 模拟海洋大气环境下铝合金表面锌黄环氧底漆/丙烯酸聚氨酯面漆涂层体系失效过程研究 |
| Failure Process of Zinc Yellow Epoxy/ Acrylic Polyurethane Composite Coating for Aluminum Alloy under Simulated Marine Environment |
| 投稿时间：2017-11-27 修订日期：2018-05-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.05.009 |
| 中文关键词: 丙烯酸聚氨酯 锌黄环氧 失光率 色差值 交流阻抗 失效 |
| 英文关键词:acrylic polyurethane topcoat zinc yellow epoxy primer gloss loss rate color variation EIS failure |
| 基金项目:国家自然科学基金项目（51401127, 51771122）；上海市青年科技启明星计划（16QB1401100, 15QB1401500） |
|
|
| Author | Institution |
| HU Ming-tao | Beijing University of Chemical Technology, Beijing 100029, China |
| JU Peng-fei | Shanghai Aerospace Equipments Manufacture, Shanghai 200245, China |
| ZUO Yu | Beijing University of Chemical Technology, Beijing 100029, China |
| TANG Yu-ming | Beijing University of Chemical Technology, Beijing 100029, China |
| ZHAO Xu-hui | Beijing University of Chemical Technology, Beijing 100029, China |
| QI Li-li | Shanghai Precision Metrology and Testing Research Institute, Shanghai 201109, China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 研究5A06型铝基材所使用的锌黄环氧底漆/丙烯酸聚氨酯面漆涂层体系的失效过程。方法 设计“紫外/冷凝3 d+中性盐雾3 d+低温暴露1 d”为一个周期的实验室循环加速试验，采用交流阻抗谱法，结合光泽度、色差值、红外光谱等数据，研究涂层体系性能。结果 循环加速试验进行到16周，该过程中面漆的失光率、色差值上升，达到轻微失光等级和轻微变色等级。面漆的表面形貌及涂层的低频阻抗发生明显变化，第12周时在光学显微镜下明显可见微小鼓泡，涂层0.1 Hz阻抗保持在109 •cm2以上，但此后鼓泡数量增加，部分鼓泡破损，颜填料流出；第14周时，0.1 Hz阻抗下降到108 •cm2，此后鼓泡数量进一步增加，部分鼓泡处面漆脱落；第16周时，0.1 Hz阻抗下降到约为107 •cm2。结论 丙烯酸聚氨酯面漆树脂基体特征官能团、聚合物链发生断裂，面漆的完整性遭到破坏，这可能与紫外线照射相关。这将加速涂层中腐蚀性介质（如水、氧和侵蚀性氯离子）渗透，促进涂层的失效。 |
| 英文摘要: |
| The work aims to study the failure process of a composite coating system composed of zinc yellow epoxy primer and acrylic polyurethane topcoat used in 5A06 aluminum substrate. The laboratory cyclic accelerated test with a cycle of “UV/condensation for 3 days, neutral salt spray for 3 days and low temperature exposure for 1 day” was designed. The performance of the composite coating was studied by adopting AC impedance spectroscopy and measuring gloss, color difference and IR. At 16 cycles of the cyclic accelerated test, the gloss loss and color difference of the topcoat increased to the level of slight loss of gloss and slight discoloration. The surface morphology of the topcoat and the impedance module changed obviously. At 12 cycles, small blister was observed obviously in the optical microscope, but the impedance module at 0.01 Hz of the coating remained above 109 •cm2. From 12th cycles, the number of blisters increased and some of broken blisters caused the out flowing of pigment. At 14 cycles, the impedance module at 0.01 Hz lowered to 108 •cm2. The blisters continuously increased and part of them peeled off. At 16 cycles, the impedance at 0.01 Hz lowered to 107 •cm2. The breakage of characteristic functional groups and polymer chains of the resin matrix of acrylic polyurethane topcoat, and incompleteness of the coating may be caused by UV irradiation and accelerate the permeation of the corrosive medium such as water, oxygen and corrosive chloride, thus resulting in coating failure. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501715号