The corrosion behavior of 20 steel,20 aluminized-steel,304,321 and 316L stainless steels had been investigated in dilute RNH2-CO2-H2O,RNH2-H2S-H2O,RNH2-H2S-CO2-H2O media by using electrochemical techniques.The 20# aluminized-steel showed good corrosion resistance.