如将一种类似单宁酸的化合物作为活性组分的产品,直接涂到金属锈层上,存在一定的工艺缺陷。这种锈转化产品的固有的局限性取决于所用的底漆或并用的树脂对锈转化层的障碍性质,使用这种产品对经常暴露在环境中的金属表面是不适宜的。单宁与锈蚀表面的反应不能产生一个完全惰性的或不 If a tannin-like compound as the active ingredient of the product, directly coated on the metal rust layer, there are some technical defects. The inherent limitations of such rust conversion products depend on the barrier properties of the primer or used resin to the rust conversion layer used and the use of such products is not desirable for metal surfaces that are frequently exposed to the environment. The reaction of tannin with the rusted surface does not produce a completely inert or not