高磷無電鍍鎳表面處理對7075-T6鋁合金機械與腐蝕性質之影響

Effects of Hgh-P Eectroless Nickel on Mechanical and Corrosion Properties of 7075-T6 Al-alloy

許正勳(Cheng-Hsun Hsu) ； 吳建興(Jian-Shing Wu) ； 林文(Wilson Lin)

《防蝕工程》 21卷2期 (2007/06) Pp. 167-175

摘要

In this study, 7075-T6 Al-alloy was used as substrate to deposit ENi film with the different thicknesses by high-phosphor electroless nickel technology. And then film characteristics (such as structure, roughness, hardness and adhesion), tensile, fatigue and corrosive behaviors of the coated specimens were analyzed in order to understand the effect of ENi film thickness on the applied performance of 7075-T6 material. With the increase of film thickness from 3µm to 7µm, the results show as the follows: (1). Both the roughness and hardness properties of the substrate are raised, but the good adhesion of the film on the substrate has no deterioration. (2). It results in a slight raise about 1.6% in tensile strength; however, its fatigue strength is reduced up to 25%. (3). Corrosion resistance is evidently improved by ENi films in 3.5wt% NaCl aqueous medium, and they are in turn 3µm-ENi＞5µm-ENi＞7µm-ENi.

關鍵字

7075-T6鋁合金 ； 高磷無電鍍鎳 ； 膜厚 ； 機械性質 ； 耐蝕性

並列摘要

In this study, 7075-T6 Al-alloy was used as substrate to deposit ENi film with the different thicknesses by high-phosphor electroless nickel technology. And then film characteristics (such as structure, roughness, hardness and adhesion), tensile, fatigue and corrosive behaviors of the coated specimens were analyzed in order to understand the effect of ENi film thickness on the applied performance of 7075-T6 material. With the increase of film thickness from 3µm to 7µm, the results show as the follows: (1). Both the roughness and hardness properties of the substrate are raised, but the good adhesion of the film on the substrate has no deterioration. (2). It results in a slight raise about 1.6% in tensile strength; however, its fatigue strength is reduced up to 25%. (3). Corrosion resistance is evidently improved by ENi films in 3.5wt% NaCl aqueous medium, and they are in turn 3µm-ENi＞5µm-ENi＞7µm-ENi.

並列關鍵字

7075-T6 Al-alloy ； High-phosphor electroless nickel ； Film thickness ； Mechanical property ； Corrosion resistance