Based on the corrosion problem of refinery heat exchanger tubes (10^#carbon steel) in the course of using, the corrosion behaviors of 10^#carbon steel in saline wastewater with different Cl^-concentration were investigated by means of immersion test and electrochemical methods, respectively. The experiments results indicated that the competitive adsorption of OH^-and Cl^-in the weak basic solution made the corrosion rates of 10^#steel had little change in different Cl^- concentration corrosion medium. The range of corrosion rate was between 0 . 145 ~ 0 . 185 mm / a.