AZ61鎂鋁合金表面改質後之交流阻抗研究

The Impedance Studies of Surface Treated AZ61 Magnesium

蔡文忠(Wen-Chung Tsai)

指導教授 ： 薛文景

國立臺北科技大學/工程學院/材料及資源工程系研究所/碩士(2011年)

摘要

本研究主要基材為AZ61鎂鋁合金，其擁有高比強度、電磁遮蔽性以及高熱傳導等性質，非常適用於3C產業上，但其使用上卻侷限於其氧化電位以致耐蝕性差，在已往普遍均以鉻酸鹽作表面改質，由於六價鉻離子有重金屬汙染問題，故本實驗研究以非鉻系之表面改質AZ61鎂鋁合金，以達到其抗腐蝕效果，最後經由電化學交流阻抗分析法(Electrochemical Impedance Spectroscopy，EIS)，探討其電化學特性。

關鍵字

AZ61鎂鋁合金 ； 表面改質 ； 電化學交流阻抗分析法

並列摘要

Magnesium alloy A61 has been used in 3C (Computer, Communication, and Consumption Electronics Productions) products because of its high strength to weight ratios, anti-electromagnetic field properties and high thermal conductivity. However, these alloys are chemically active and exhibit inferior corrosion resistance, which has been limited to their practical application. Due to the hazardous pollution environmentally from hexa-valent chromium ion, the non-chromates of surface treatment on AZ61method were proposed in this study. The electrochemical characteristics of treated specimens were elucidated by AC impedance methods. Electrochemical impedance spectroscopy data were obtained from Solartron equipments with electrochemical interface and frequency response analyzer, which covered frequency range up to 106 Hz of 10 mV rms signal amplitude.

並列關鍵字

AZ61 magnesium alloy ； surface treatment ； anti-electromagnetic ； corrosion resistance ； electrochemical impedance spectroscopy

參考文獻

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