CORROSION BEHAVIOR OF HSn70 - 1B TUBE IN ALKALINE SODIUM CHLORIDE SOLUTION
HSn70-1B铜管在碱性NaCl溶液中的腐蚀行为

Corrosion behavior of H Sn 70-1B tube in alkaline sodium chloride solution has been investigated by electrochemical methods and surface analysis techniques.By free corrosion,Cu 2O film is observed on the surface of H Sn 70-1B tube.The anodic polarization curves exhibit that there exists rapid growth of anodic dissolution current and diffusion process control reactions on the electrode surface.Two semicircles are found in electrochemical impedance spectroscopy,and with the growth of content of chloride the semicircle's diameter decrease gradually.