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| 摘要: |
| 采用磷酸阳极化方法对铝合金试片进行了处理并考察了其粘接性能。阳极化处理使铝合金试片表面产生了微观粗糙的多孔膜，最初形成的孔互不连通，随着阳极化过程的继续，孔与孔之间互相贯通；胶接时胶粘剂能够渗入多孔膜，并在粘接界面上形成过渡层，实现良好的机械啮合。经阳极化处理后，铝合金试片粘接性能显著提高，拉剪强度在粘接副为铝合金时提高了238％，粘接副为铝合金／复合材料时提高了104％，且破坏模式为混合破坏。对粘接副的耐候性进行了考核，在25～70℃时，其拉剪强度保持不变，100℃时拉剪强度为30．25MPa，与常温拉剪强度相比下降了19．2％；粘接副经碱水浸泡后拉剪强度降低，经过100h浸泡后拉剪强度为35．55MPa，降低了8．1％。 |
| 关键词: 磷酸 阳极化 粘接 铝合金 |
| DOI： |
| 分类号: |
| 基金项目:武器装备预研基金资助 |
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| The Phosphoric Acid Anodizing of Aluminum Alloys and the Analysis of its Adhesive Properties |
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YANG Fu-biao, XIAO Jia-yu, ZENG Jing-cheng, XING Su-li, WANG Zun, JIANG Nan
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| Abstract: |
| The aluminum alloy samples were anodized in the aqueous solutions of phosphoric acid and their adhesive properties were analyzed. A porous and microrough film was formed on the surface of the anodized samples. With the process of anodizing, the isolated cavities were perforated. A transition layer on the adhesive interface was formed when the adhesive penetrated into the film. The lap shear strength of the bond, in which the adherends are anodized, was promoted greatly due to the mechanical interlocking and the mixed failure mode had been found. When the adherends is anodized, the lap shear strength of the bond was 238 percent larger than that of the non-anodized one. When one of the adherends is composite material, it was 104 percent larger. The durability of samples was also examined. The lap shear strength of bond kept constant between 25～70 ℃, while it became 30.25 MPa at 100 ℃, droped 19.2 percent . The lap shear strength of the bond also droped to 35.55 MPa after dipped into alkaline water for 100h, droped 8.1 percent. |
| Key words: Phosphoric Acid Anodizing Adhesion Aluminum Alloy |
