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近几年液体化工、农药、食品金属大包装容器(如50立升、100立升、200立升)采用内涂料防腐逐渐增多,市场上用于金属包装容器的内涂料有好多种,由于化工、农药品种繁多,分组复杂,常年温度有高有低,存放时间有长短,运输距离有远近,如想用某一种涂料来对付所有化学品包装在目前是难办到的。据有关用户反映,往往因涂料选择不当而发生事故和影响外贸的出口。为此,我们对国内金属包装容器内涂防腐使用面较广的PVF 涂料、氯磺化聚乙烯涂料、环氧酚醛涂料三者的主要耐化学品腐蚀性能和物理机械性能及施工工艺作一比较,供有关参考。一、耐酸试验试片的准备及涂复1.试片的准备:三种涂料试片均采用规格120×50×1mm 黑铁板。2.试片的预处理:三种涂料试片均采
In recent years, liquid chemicals, pesticides, food, metal containers (such as 50 liters, 100 liters, 200 liters) with the use of anti-corrosion coating gradually increased, the market for metal packaging containers have a variety of inner coating, due to chemical industry , A wide range of pesticides, grouping complex, perennial temperature is high and low, the length of storage time, transport distance is far and near, such as want to use a certain coating to deal with all chemical packaging is currently difficult to do. According to the relevant user reports, often due to improper choice of paint accidents and affect the export of foreign trade. For this reason, we compare the main chemical corrosion resistance, physical and mechanical properties, and construction techniques of PVF coating, chlorosulfonated polyethylene coating and epoxy phenolic coating which are widely used in domestic metal-coated containers For reference. First, the acid test strip preparation and coating 1. Preparation of the test strip: Three kinds of paint test strips are used 120 × 50 × 1mm black iron plate. 2. Specimen pretreatment: three kinds of paint samples were taken