PVC管材钙锌化后设备真空罐水变红解决办法

Solution for reddening of water in vacuum tank of PVC pipe after calcium zincation

PVC管材钙锌稳定剂替换铅盐稳定剂后,铁质真空罐内水的颜色由无色变成深红色,主要是三价铁离子与β-二酮类物质反应造成,对环境造成了一定污染,将铁质真空罐换成PE真空罐后,深红色水变成淡黄色水,而且选择铁离子含量低的轻钙或者天然重钙,也可以改善真空罐内水的颜色。

After replacing lead salt stabilizer with calcium and zinc stabilizer in PVC pipe, the color of water in iron vacuum tank changes from colorless to crimson, which is mainly caused by the reaction of trivalent iron ion with β-diketone, which causes certain pollution to the environment. After replacing the iron vacuum tank with the PE vacuum tank, the crimson water becomes yellowish water, and the selection of light calcium or natural heavy calcium with low iron ion content can also improve the color of the water in the vacuum tank.