篇名 | 鋁鎂合金表面披覆環氧樹脂∕奈米碳管複合塗層之耐磨耗腐蝕性質 |
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卷期 | 22:1、22:1 |
並列篇名 | Electrochemical Study on the Wear-corrosion Properties of Al-Mg Alloy with Epoxy/ Carbon Nano-tube Composite Coating |
作者 | 李正國 、 黃俊彥 、 黃凱平 、 譚安宏 、 李源發 |
頁次 | 67-72 |
關鍵字 | 多壁奈米碳管 、 5083鋁鎂合金 、 磨耗腐蝕 、 摩擦係數 、 Epoxy/ carbon nano-tube composite coating 、 Multiple-wall carbon nano-tube 、 5083 Al-Mg alloy 、 Wear-corrosion resistance 、 EI |
出刊日期 | 200803 |
本研究嘗試添加奈米碳管粉末於環氧樹脂中,以增加樹脂的導電性、耐腐蝕與磨耗腐蝕性。將此複合塗層塗佈於5083鋁鎂合金基材,以塊對環(Block-on-ring)表面摩擦方式在3.5wt% NaCl水溶液中施加負荷100 g、轉速100 rpm、磨耗60分鐘。並在0.5M H2SO4+2 ppm NaF腐蝕環境下以電化學極化量測評估其耐腐蝕行為。實驗結果顯示環氧樹脂∕多壁奈米碳管複合塗層有優越的耐腐蝕性,在奈米碳管達8%時電阻率可減低至9.96×10-2 Ω*cm,相對於5083鋁鎂合金具有優異的腐蝕與磨耗腐蝕保護性行為(腐蝕電流密度只有0.746 µmA*cm-2),並且隨著奈米碳管的增加而減少了磨耗損失,在奈米碳管達16%時摩擦係數(µ)僅有0.052左右,比類鑽薄膜之摩擦係數(大約0.1)還要低。
The purpose of the present study is to evaluate the effect of epoxy/carbon nano-tube composite coating adding with different concentrations (4~20%) of multiple-wall carbon nano-tube on the electrical conductivity, corrosion and wear-corrosion properties of 5083 Al-Mg alloy. The wear-corrosion test was performed in 3.5wt.% NaCl solution by a block-on ring friction manner, with applied normal load of 100 g and wear rotation speed of 100 rpm. The wear-corrosion testing time was 60 min. Electrochemical potentiodynamic polarization was conducted in solution of 0.5M H2SO4+2ppm NaF to evaluate the corrosion behavior of specimens. The experimental results indicated that epoxy/carbon nano-tube (CNT) has an excellent corrosion resistance behavior with high corrosion potential and low corrosion current density (0.746μA‧cm^(-2)). The epoxy/carbon nano-tube composite coating also showed an excellent wear-corrosion resistance, and the wear loss decreased with increasing concentration of CNT. When the concentration of CNT reached to 16% the friction coefficient (μ) of epoxy/carbon nano-tube composite coating was reduced to about 0.052, which was lower than that of diamond-like carbon (DLC) film (about 0.1).