本研究主要探討三種腐蝕抑制劑對FeCoNiCuAl高熵合金3.5%NaCl水溶液中的抑制行為。由電化學實驗結果得知,三種抑制劑中,添加Na3PO4將使高鏑合金的孔蝕電位值(E(下標 pit))最高且鈍化區(△E(下標 p))範圍最大,NaNO2次之,而Na2MoO4最小;同時,鈍化電流密度(I (下標 pass))則以Na3PO4最小,Na2MoO4次之,NaNO2最大,顯示添加Na3PO4對高熵合金的腐蝕抑制效果最好。
This study is to evaluate the corrosion resistance of the newly developed Fe-Co-Ni-Cu-Al high entropy alloy (HEA) in 3.5% NaCl solutions. Three corrosion inhibitors(Na3PO4、Na2MoO4 and NaNO2) were chosen to improve the corrosion resistance in test solutions. The results indicated that Na3PO4 exhibited the best corrosion inhibition efficiency among the test inhibitors due to improving the passivity region and reducing the passivation current in polarization curves.