金属生锈之后,常在其表面留下一些共同的特征。但是这些特征不一定同时都呈现在锈蚀的部位。①锈蚀表面普遍失去金属光泽。②生锈处表面状态粗糙不平且不规则。③在生锈处常有锈蚀产物堆出,膨胀,剥落等。不同的金属或同一种金属而在不同的环境下所产生的腐蚀产物各有不同的特征,首先表现在有不同的颜色。下面是几种主要金属腐蚀颜色:铜和 Metal rust, often leaving some common features on its surface. However, these features are not necessarily both present in the corroded parts. ① rust surface generally lose the metallic luster. ② rusted surface roughness rough and irregular. ③ Rusty rust products often pile up, swelling, peeling and so on. Different metals or the same metal in different environments produce corrosion products have different characteristics, first showed in different colors. Here are some of the major metal corrosion colors: Copper and