冷却水系统的管线和设备都要受到腐蚀和结垢,虽然使用常规的铬酸盐和磷酸盐等药剂可以减缓腐蚀和结垢,但因毒性或价格较贵,使这些药剂的使用受到一定的限制。某些天然植物产品能减缓水的腐蚀和垢的形成,丹宁及其衍生物可以用来保护钢或铁制工具及管线的腐蚀就是一个例证。本文报道了从天然植物的叶、种籽、壳和果实中提 Pipeline and equipment for cooling water systems are subject to corrosion and fouling. Although the use of conventional chromate and phosphate agents can slow down corrosion and scaling, the use of these agents is subject to certain levels of toxicity or price limit. Certain natural plant products slow water erosion and scale formation, as exemplified by the use of tannins and their derivatives to protect steel and iron tools and pipelines. This article reports from the leaves, seeds, shells and fruits of natural plants