ABSTRACT A multi-metal Ti/Zr/V based conversion coating was employed to improve the adhesive strength of the epoxy coating on aluminum alloy 6063 (AA6063). The drying temperature of Ti/Zr/V conversion coating (TZVCC) was studied as a factor that could influence the adhesion performance of the epoxy coating on the substrate. The surface morphologies, cross-section micrograph and chemical compositions of different samples were fully characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM) and energy disperse spectroscopy (EDS), respectively. The tape measurement and pull-off tests were used to investigate the adhesive strength of samples under three conditions (dry, wet and recovery). The TZVCC after conversion treatment for 50 s had a golden appearance and exhibited a smooth and compact structure. Drying the TZVCC at high temperature could reduce the sizes of the holes disposed on the TZVCC/epoxy coating interface, as well as improve the adhesive strength. The highest pull-off strength was obtained at drying temperatures of 80°C, 100°C and 100°C for dry, wet and recovery conditions. TEM results revealed that the epoxy resin powder would permeate into TZVCC during the curing process, which significantly improved the adhesive strength of the epoxy coating on the matrix.

中文翻译：

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TZVCC干燥温度对AA6063环氧涂层附着性能的影响

摘要 采用多金属 Ti/Zr/V 基转化涂层来提高环氧树脂涂层在铝合金 6063 (AA6063) 上的粘合强度。研究了 Ti/Zr/V 转化涂层 (TZVCC) 的干燥温度作为影响环氧涂层在基材上的附着力的一个因素。分别通过扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和能量色散谱 (EDS) 对不同样品的表面形貌、横截面显微照片和化学成分进行了全面表征。胶带测量和拉拔测试用于研究样品在三种条件下（干、湿和恢复）的粘合强度。转化处理50 s后的TZVCC外观呈金色，结构光滑致密。高温干燥TZVCC可以减少TZVCC/环氧树脂涂层界面上的孔洞尺寸，并提高粘合强度。对于干燥、潮湿和恢复条件，在 80°C、100°C 和 100°C 的干燥温度下获得了最高的拉拔强度。TEM 结果表明，环氧树脂粉末在固化过程中会渗透到 TZVCC 中，这显着提高了环氧树脂涂层在基体上的粘合强度。