本論文主要在研究Fe40Ni35Al25合金之腐蝕性質。結果顯示，Fe40Ni35Al25合金的基地為BCC結構。因此，本論文以恆電流/恆電位儀測量合金在1M硫酸、1M硝酸、1M鹽酸、1M氯化鈉以及1M硫酸再分別添加1M氯化鈉、0.1M氯化鈉、0.01M氯化鈉混合之溶液中30℃、40℃、50℃、60℃下的極化曲線，來測定其腐蝕電位、腐蝕電流、鈍態區間電位，並與市售304不銹鋼做比較。
實驗中利用場發射式電子顯微鏡(FE-SEM)去觀察合金腐蝕後金相以進一步了解腐蝕行為及優先腐蝕位置。
根據電化學實驗結果顯示，合金置於不同溫度下之7種溶液中，腐蝕電流及腐蝕電位雖沒有明顯變化，但隨著溶液溫度的提高，鈍態區電流會向右偏移，而鈍態區也會隨之減少。
This thesis studied the electrochemical properties of the Fe40Ni35Al25 alloy. The results indicated that the matrix of this alloy was a BCC structure. Furthermore, the polarization curves the alloy was tested under four different temperatures (30˚C, 40˚C, 50˚C, and 60˚C), and the solutions were 1M H2SO4、1M HNO3、1M HCl、1M NaCl、1M H2SO4+1M NaCl、1M H2SO4+0.1M NaCl and 1M H2SO4+0.01M NaCl solutions. After that, this experiment analyzed corrosion potentials, corrosion currents, and their passive range. All these results were also compared with the properties of commercial 304 stainless steel.
This study also used the field emission scanning electron microscope (FE-SEM) to observe the morphology after corrosion.
The corrosion potentials and currents of this alloy did not change significantly in these seven solutions under different temperatures. However, the currents of passive regions would gradually increase while the temperatures increased.
