Effect of Corrosion Inhibitors on Corrosion Behavior of Magnetic Refrigeration Material LaFe_10.8Co_0.7Si_1.5C_0.2 in Aqueous Media

Effects of different corrosion inhibitors on corrosion behavior of LaFe10.8Co0.7Si1.5C0.2 in aqueous media were investigated by electrochemical techniques. The results show that all studied inhibitors have inhibition effect on LaFe10.8Co0.7Si1.5C0.2. The best inhibition efficiency under acid condition (pH=6.5) is 90.00% by the inhibitor made of K2CrO7 and Na2CO3, and 82.57% by the inhibitor made of Na2MoO4·2H2O and Na2HPO4·12H2O under alkaline condition (pH=8).