涂覆有机涂层的镀锡薄钢板耐蒸煮性能电化学快速检测技术研究  

Fast Evaluation of Resistance to High Temperature Steam Sterilization Process for Organic Coating Coated Tinplate by Electrochemical Method

作　　者：刘喆 邓成满 魏军胜[2] 夏大海[1] LIU Zhe;DENG Chengman;WEI Junsheng;XIA Da-Hai(School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China;Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China)

机构地区：[1]天津大学材料科学与工程学院,天津300350 [2]宝山钢铁股份有限公司,上海201900

出　　处：《中国腐蚀与防护学报》2024年第4期883-890,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：宝山钢铁股份有限公司项目。

摘　　要：采用阴极极化和电化学阻抗谱相结合的方法评价了聚酯、环氧酚醛和环氧氨基涂层涂覆镀锡薄钢板在127℃水蒸气中的耐蒸煮性能,并探讨了耐蒸煮机制。结果表明,阴极极化电流可以有效区分食品包装用涂层镀锡薄钢板的防护性能,阴极极化电流越大,涂层防护性能越差。环氧酚醛涂层的耐蚀性最好,环氧氨基涂层次之,聚酯涂层的耐蚀性最差。经127℃高温蒸煮1 h后,涂层/镀锡薄钢板体系在3.5%NaCl溶液中的防护性能有所下降,低频阻抗模值有所减小,最小值为5.4%,最大值为69.7%。总体来看,3种涂层的耐蒸煮性能相当。涂层/金属间的结合力、涂层的润湿性是影响耐蒸煮性能的主要参数,结合力越好,涂层的润湿性越差,耐蒸煮性能越好。The resistance to high temperature steam sterilization process of tinplate coated with polyester,epoxy-phenolic and epoxy-amino coating respectively was studied by cathodic polarization and electrochemical impedance spectroscopy(EIS),and then the relevant mechanism was also discussed.The results showed that the cathodic polarization current can effectively distinguish the protective properties of coated tinplate for food packaging,and the higher the cathodic polarization current,the worse the protective properties of the coating.The corrosion resistance of epoxy phenolic coating is the best,followed by the epoxy amino paint,and that of polyester coating is the worst.After high temperature steam sterilization at 127oC for 1 h,the protection performance of the coated tinplate in 3.5%NaCl solution decreased,and the low-frequency impedance modulus decreased,namely the minimum value was 5.4%and the maximum was 69.7%.Overall,the resistance to high temperature steam sterilization of the three coatings was similar.The bonding strength between the coating/tinplate and the wettability of the coating were the main parameters that affect its resistance to high temperature steam sterilization process.The better the bonding strength and the worse the wettability of the coating,the better the resistance to the high temperature steam sterilization process.

关 键 词：镀锡薄钢板 电化学阻抗谱 阴极极化 快速评价 

分 类 号：O646[理学—物理化学]