(1. 北京科技大學(xué) 材料科學(xué)與工程學(xué)院，北京 100083；
2. 湖北新冶鋼有限公司 中信特鋼研究院新冶鋼分院，黃石 435001)
摘 要: 為了研究浸鋅工藝對鋁的表面形貌以及鋁/電鍍鎳之間結(jié)合強度的影響規(guī)律，分別對鋁進行一次浸鋅和二次浸鋅處理，然后進行電鍍操作并得到鋁/電鍍鎳試樣。通過拉伸試驗測量鋁/電鍍鎳之間的結(jié)合強度，并利用掃描電子顯微鏡(SEM)和能譜儀(EDS)考察鋁表面、鋁/電鍍鎳試樣的截面及拉伸斷面的形貌和化學(xué)成分。結(jié)果表明：鋁在電鍍前經(jīng)一次浸鋅處理后，鋁/電鍍鎳結(jié)合強度為10.7MPa；經(jīng)二次浸鋅處理后，鋁/電鍍鎳結(jié)合強度優(yōu)于一次浸鋅處理的，可達28.5 MPa。硅在一次浸鋅層中形成夾雜物，導(dǎo)致鋁受到鍍液的腐蝕，是造成一次浸鋅處理后鋁/電鍍鎳結(jié)合強度較差的主要原因。
關(guān)鍵字: 浸鋅層；鋁；電鍍鎳；結(jié)合強度
（1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Xinyegang Branch of Special Steel Research Institute of China International Trust and Investment Corporation,
Hubei Xingyegang Steel Co., Ltd., Huangshi 435001, China）
Abstract:In order to investigate the effect of zinc coating process on the surface morphology of aluminium and the bonding strength of aluminium/electroplated nickel, aluminium was coated with single and secondary zinc layer before electroplating, respectively. And then, aluminium/electroplated nickel specimens were prepared. The bonding strength of aluminium/electroplated nickel was measured by tensile tests. The morphologies of aluminum surfaces, the cross sections and tensile fractures of the aluminium/electroplated nickel specimens were investigated by scanning electron microscopy (SEM), and the chemical compositions were measured by energy disperse spectroscopy (EDS). The results indicate that the bonding strength of aluminium/electroplated nickel with single zinc coated before electroplating is 10.7 MPa, while that after secondary zinc coating before electroplating is higher than that after single zinc coating, up to 28.5 MPa. It is the silicon inclusions in the single zinc coating layer that lead aluminium corroded by the electroplating solution, which is the main reason for the poor bonding strength after single zinc coating.
Key words: zinc coating; aluminium; electroplated nickel; bonding strength
