本實驗目的在研究NiAlFe合金之電化學性質， 分別是以Ni(下標 47.5)Al(下標 25)Fe(下標 27.5)、（Ni(下標 47.5)Al(下標 25)Fe(下標 27.5)）(下標 99)Cr(下標 1)、（Ni(下標 47.5)Al(下標 25)Fe(下標 27.5)）(下標 99)Nb(下標 1)之介金屬來測試，實驗以恆電流/恆電位儀測量其三種合金分別再0.25、0.5、0.75 以及1M濃度下的硫酸溶液中的腐蝕電位、臨界電流以及腐蝕速率，並以304不銹鋼來作比較。電化學實驗結果顯示隨著硫酸濃度的提升至1M，腐蝕電流以及腐蝕電位並無明顯差距，但是鈍態區腐蝕電流有漸漸提升的趨勢。本研究中之三種合金對硫酸的抗蝕能力皆優於304不銹鋼。
The thesis studied the electrochemical property on the NiAlFe based intermetallic alloys, including Ni(subscript 47.5)Al(subscript 25)Fe(subscript 27.5), (Ni(subscript 47.5)Al(subscript 25)Fe(subscript 27.5)) (subscript 99)Cr(subscript 1), (Ni(subscript 47.5)Al(subscript 25)Fe(subscript 27.5)) (subscript 99)Nb(subscript 1). For testing the corrosion rates of these three alloys, these alloys were statically immersed in H(subscript 2)SO(subscript 4), respectively. The results were also compared with corrosion rates of commercial 304 SS. In addition, the polarization curves of these three alloys in sodium chloride solutions with different concentrations were also tested for measuring their corrosion potentials and corrosion currents. The results indicated that the corrosion potentials and the corrosion currents have no significant difference by changing the concentration of H(subscript 2)SO(subscript 4) solution, but the passive area of current density gradually increased. The corrosion resistances of these alloys were all better than 304 SS.
