AA5083鋁合金電鍍鎳磷 改質鑽石複合塗層的製備及特性鑑定

Preparation and characterization of electroplating Ni-P/ modifieddiamond composite coatings on AA5083 aluminum alloy

鄭侑鋐(You-Hong Zhen)

指導教授 ： 李正國

共同指導教授 ： 張祖列(Zu-Lie Zhang)

健行科技大學/工程學院/機械工程系碩士班/碩士(2020年)

摘要

本研究以AA5083 鋁合金 (Al Mg) 為基材，藉由在陽極處理後的鋁合金上進行電鍍鎳、鎳磷 /Ti 或 Ni 改質鑽石粉末複合塗層沉積，分析經電鍍技術對鋁合金表面沉積之各種複合塗層的表面結構 、機械性質與耐蝕性之影響效應。利用掃描式電子顯微鏡 (觀察表面氧化膜形態。在 3.5wt% NaCl 水溶液的腐蝕環境下以電化學極化與開放電路腐蝕電位量測評估其耐腐蝕行爲。
實驗結果顯示，陽極前處理可促進電鍍鎳磷複合鍍層的沉積，經過電鍍鎳磷/(Ti 或Ni) 改質鑽石複合塗層沉積的 AA5083 鋁合金，能有效增強鋁合金的表面硬度，並能顯著提升鋁合金在氯化鈉水溶液中的耐腐蝕的特性。在所有的複合鍍層中，電鍍鎳磷 /Ni 改質鑽石複合鍍層經 450C 、 15min 快速退火，除可提升硬度外，因具均勻細緻連續的表面結構而有最穩 定的腐蝕電位與低腐蝕電流密度。

關鍵字

AA5083 鋁合金 ； 陽極處理 ； 電鍍 ； 複合鍍層

並列摘要

This study pres ented AA5083 aluminum alloy as the substrate, and Ni, Ni P, with Ti or Ni modified diamond composite coatings was prepared on the anodized aluminum alloy by electroplating techniques. The various composite coatings were evaluated their effect on the micro structure, mechanical and corrosion properties. The corrosion properties were analyzed by performing electrochemical corrosion test in 3.5% NaCl solution.
The experimental results indicated that the anodizing pretreatment of the aluminum alloy can effecti vely improve the deposition of the electroplating coatings.Electroplating Ni P/Ti or Ni modified diamond coatings significantly increase the surface hardness and corrosion resistance. Among all composite coatings, the Ni P/Ni modified diamond coating af ter 450 、15min rapid annealing with the exception of increasing the har d ness as well as exhibited a stableand noble corrosion potential also with low corrosion current density.

並列關鍵字

AA5083 Aluminum Alloy ； Anodizing ； Electroplating ； Composite Coating

參考文獻

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