一、前言在涂有润滑油和防锈油的金属毒面,常常发现有从茶褐色到深茶色的变色现象.这种变色与现场锈蚀和腐蚀不同,称之为油斑或油污.它不仅作为锈前物质存在造成问题,而且用一般的除油工序不能清除干净,因而使产品阶值下降、增加除油斑施工费.这种油斑现象,夏天发生多,冬天发生较少,但也有发生的.发生的地点多半是工厂内 I. Introduction Metallic noodles coated with lubricating oil and antirust oil are often found with discoloration from dark brown to dark brown, which is different from on-site rusting and corrosion and is called oil stain or oil stain. Pre-rust substances cause problems, but also with the general degreasing process can not be cleaned, thus reducing the product order value, increase the addition to the oil spot construction costs. This oil spot phenomenon occurs in summer and less in winter, but also occurred The place of occurrence is mostly within the factory