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首页> 外文会议>Second International Symposium on Adhesive Joints: Formation, Characteristics and Testing Vol.2 May 22-24, 2000 Newark, New Jersey >The effects of surface modification of steel on wettability and joint strength
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The effects of surface modification of steel on wettability and joint strength

机译：钢表面改性对润湿性和接头强度的影响

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摘要

In order to gain insight into the aspects of surface roughness, surface profile, resin viscosity, and surface morphology, experiments were conducted using two different steels (1018 cold rolled & hot rolled weld steel). Four different surface modifications were performed on these samples by sand blasting at 552 kPa from a distance of 25.4 mm and chemical etching using a chromic acid recipe for 2 minutes and 10 minutes. Two different resins were used, namely Epon 815, and Epon 830 with viscosities of 5 to 7 poise and 170 to 225 poise, respectively, to assess the effect of viscosities on interactions with different surface topographies. Contact angles were measured on all surfaces using the two resins. The metal specimens were bonded under pressure and cured in an oven at 121℃ for 2 hours. To gain insight into the effect of surface topography, SEM was utilized to observe the modified surfaces at different magnifications. Average, and maximum peak-to-valley height values were measured using a profilometer and surface profiles were also obtained for all the samples. The strength and displacement values were measured at two different crosshead speeds of 1 and 100 mm/min, to assess the interrelation between the failure mechanisms and joint displacements, surface topography and resin viscosity.
机译：为了深入了解表面粗糙度，表面轮廓，树脂粘度和表面形态等方面，我们使用两种不同的钢（1018冷轧和热轧焊接钢）进行了实验。通过在552 kPa处从25.4毫米的距离喷砂，并使用铬酸配方进行2分钟和10分钟的化学蚀刻，对这些样品进行了四种不同的表面改性。使用两种不同的树脂，即粘度分别为5至7泊和170至225泊的Epon 815和Epon 830，来评估粘度对与不同表面形貌相互作用的影响。使用两种树脂在所有表面上测量接触角。将金属试样在压力下粘合，并在121℃的烘箱中固化2小时。为了深入了解表面形貌的影响，使用SEM观察了不同放大倍数下的改性表面。使用轮廓仪测量平均和最大峰谷高度值，并获得所有样品的表面轮廓。在1和100 mm / min的两种不同十字头速度下测量强度和位移值，以评估破坏机理与接头位移，表面形貌和树脂粘度之间的相互关系。

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