無電鍍鎳磷銅/石墨烯複合塗層沉積在鋁合金表面的耐磨耗與腐蝕性質研究

Wear and Corrosion Resistance Properties of Electroless Ni-P-Cu/Graphene Composite Coatings Deposited on Aluminum Alloy in 0.5M H2SO4 Solutions

黃章智(Chang-Chuh Huang)

指導教授 ： 李正國

健行科技大學/工學院/機械工程系碩士班/碩士(2015年)

摘要

本研究藉由複合無電鍍技術，在AA6061鋁合金原基材分別經熱氧化處理與電流陽極處理，以無電鍍法析出Ni-P-Cu/Graphene複合鍍層，分析鍍膜的結構與機械性質，並探討無電鍍Ni-P-Cu/Graphene複合鍍層對AA6061鋁合金在0.5M H2SO4水溶液中腐蝕破壞的影響。
實驗中使用AA6061鋁合金原基材經陽極及熱處理，無電鍍鎳磷銅，無電鍍鎳磷銅/石墨烯複合鍍層，探討經熱處理與陽極處理後的鎳磷銅/石墨烯複合鍍膜的表面結構、耐磨耗腐蝕與耐腐蝕性的影響效應。本實驗利用掃描式電子顯微鏡（SEM）及能量散射光譜儀(EDS)、維克氏微硬度試驗機(Hv)等，觀察鍍膜表面的形態、鍍層的元素分析、量測表面硬度。在0.5M H2SO4水溶液中進行磨耗腐蝕試驗，並進行電化學動態極化法分析試驗。
研究結果顯示AA6061鋁合金試片表面經陽極處理後硬度值增加，其無電鍍鎳磷銅/石墨烯複合鍍層更能有效的增加鍍層表面硬度，也能提供鋁合金基材的腐蝕與耐磨腐蝕保護性，石墨烯的添加可提供潤滑性，使Ni-P-Cu有最佳的耐磨耗腐蝕性，尤其添加石墨烯經陽極處理後的更有強化耐腐蝕與磨耗腐蝕的作用。

關鍵字

AA6061 ； 陽極處理 ； 磨耗腐蝕 ； 無電鍍鎳磷銅/石墨烯

並列摘要

This study using electroless-plating techniques to deposit the Ni-P-Cu/Graphene composite coatings on AA6061 aluminum alloy substrate after pre-treatment including thermal oxidation or anodizing evaluates the structure, mechanical properties of the composite coatings as well as their corrosion and wear resistance in 0.5M H2SO4 solution.
The corrosion resistance behavior of the composite coatings was performed by using electrochemical polarization measurements. The surface morphology and elemental analysis and surface hardness of the composite coatings before and after all tests are analyzed by scanning electron microscopy (SEM) and X-ray energy dispersive analyzer (EDS). The surface hardness of the specimens was measured by a Vickers′ micro-hardness tester. It is hoped that the effect of the thermal oxidation or anodizing pre-treatment on the surface structure, corrosion and wear resistance of the composite coatings could be evaluated.
The results indicated that AA6061 aluminum alloy after anodizing oxidation increases its surface hardness as well as the electroless Ni-P-Cu/Graphene composite coatings. Moreover, these composite coatings could present the well corrosion and wear protection ability to the aluminum alloy substrate. Because the graphene has a good lubrication ability such that the Ni-P-Cu/Graphene composite coating has the best corrosive wear resistance property especially as the alloy substrate after anodizing pre-treatment.

並列關鍵字

AA6061 ； anodizing ； wear corrosion ； Ni-P-Cu/Graphene coating.

參考文獻

參考文獻

1. 尤光先編譯，鋁的陽極處理技術，臺北，徐氏基金會，132~140頁，民國七十二年。

2. 周孟鋒，複合金屬粉末之製備與應用，逢甲大學，碩士論文，民國九十一年。

3. 陳宏生，謝淑惠，楊聰仁，”銅無電鍍鎳熱處理後在3.5wt % NaCl 抗蝕性研究”，防蝕工程，第十四卷，第四期，1-8頁，民國八十九年。

4. 曾錫萍，「等通道彎角擠製參數對5083 鋁合金之影響」，國立中央大學，民國九十三年。