不锈钢供水管道中铬元素迁移及防控技术

The Migration and Prevention and Control of Chromium in Stainless Steel Pipe of Domestic Water

选择国内企业生产的不锈钢供水管道,用余氯和硬度分别为2、100 mg/L的浸泡液浸泡24 h,并检测水质中六价铬的变化。结果显示,浸泡液中的六价铬变化与不锈钢供水管道的工艺有很大关系,焊缝处理、打磨抛光、酸洗钝化三个条件都对六价铬的迁移有很大影响。

Select the stainless steel water pipe made in China,soaked with the solution with theconcentration of residual chlorine is2mg/L and the hardness is100mg/L for24h,then detect the differenceof concentration of Hexavalent chromium.The result shows that the concentration of Hexavalent chromium insoaking water is greatly related to the conformation of stainless steel pipe.Weld seam treatment,grinding andpolishing,pickling and passivation are three important conditions in the migration of Hexavalent chromium.