采用硫酸溶解方解石的方法对反渗透淡化海水进行矿化,参照以色列颁布的淡化水后处理水质标准进行混合、加NaHCO_3调节水质,考察碱度、pH、碳酸钙沉淀势与NaHCO_3添加量的关系;采用挂片法和电化学法考察淡化海水的后处理对铸铁、不锈钢、双相钢腐蚀性的影响。结果表明,碱度、碳酸钙沉淀势和pH随NaHCO_3添加量的增大而升高。随着NaHCO_3添加量的增加,3种金属的腐蚀速率都呈下降趋势,其中双相钢的耐蚀性最好。在实验条件下处理后的淡化海水CaCO_3的质量浓度为99.3 mg/L,碱度(CaCO_3计)为82.9 mg/L、碳酸钙沉淀势(CaCO_3计)为6.6 mg/L(CaCO_3计),pH=7.76,水质稳定,具备一定的缓冲能力,可以进入市政供水系统。 The method of dissolving calcite with sulfuric acid was used to mineralize reverse osmosis desalinated seawater, and the water quality of desalinated water released by Israel was mixed according to the standard of water quality control by adding NaHCO_3. The relationship between alkalinity, pH, precipitation potential of calcium carbonate and NaHCO_3 addition was investigated. The effects of post-treatment of desalinated seawater on the corrosiveness of cast iron, stainless steel and duplex steel were investigated by coupon method and electrochemical method. The results showed that alkalinity, calcium carbonate precipitation potential and pH increased with the increase of NaHCO 3 content. With the increase of NaHCO 3, the corrosion rate of all three metals showed a decreasing trend, and the corrosion resistance of duplex steel was the best. Under the experimental conditions, the concentration of CaCO 3 in the desalinated seawater was 99.3 mg / L, the alkalinity (CaCO 3) was 82.9 mg / L, the precipitation potential of CaCO 3 was 6.6 mg / L (CaCO 3), the pH = 7.76, water quality is stable, with a certain buffer capacity, can enter the municipal water supply system.