It was discovered that corrosion resistance of the epoxy antirust paint could be improved and rust could be conversed by adding vegetable tannic acid in the paint.
通过实验发现在环氧－聚酰胺防锈漆中加入植物丹宁酸能提高其耐蚀性，并能够转化锈，而合成丹宁酸这种作用不明显。
