复合缓蚀剂在软化水中对低碳钢的协同缓蚀作用  

Synergistic corrosion inhibition effect of composite corrosion inhibitor on carbonsteel in softened water

作　　者：康保生 齐心 齐千一 杨红健[1] Kang Baosheng;Qi Xin;Qi Qianyi;Yang Hongjian(School of Chemical Engineering,Hebei University of Technology,Tianjin 300400,China;Chengde Shengjinwei Thermal Insulation Materials Co.Ltd.,Chengde 067400,China;School of Materials and Energy,Guangdong University of Technology,Guangzhou 511442,China)

机构地区：[1]河北工业大学化工学院,天津300400 [2]承德盛金维保温材料有限公司,河北承德067400 [3]广东工业大学材料与能源学院,广东广州511442

出　　处：《电镀与精饰》2023年第3期1-10,共10页Plating & Finishing

摘　　要：采用静态失重法、电化学测试和表面表征技术研究了环境友好型复合缓蚀剂对低碳钢在软化水中的缓蚀作用。结果表明,钼酸钠、硅酸钠、四硼酸钠和葡萄糖酸钠4种单组分缓蚀剂在成本和缓蚀率上都不具有优势,复合缓蚀剂的缓蚀率远高于相同剂量的单组分缓蚀剂。浓度为140 mg/L的复合缓蚀剂在温度50℃和浸泡时间72 h条件下的缓蚀率为84.77%。当温度改变后,缓蚀率变化较小,说明复合缓蚀剂具有一定的稳定性。扫描电镜(SEM)表面观察证实了复合缓蚀剂在碳钢表面的腐蚀抑制作用,通过光电子能谱(XPS)分析推测了复合缓蚀剂对腐蚀的抑制机理,从而阐明碳钢表面缓蚀剂的协同保护机制。The corrosion inhibition effect of environmentally friendly compound corrosion inhibitor on carbon steel in softened water was studied by static weight loss method, electrochemical test and surface characterization. The results show that sodium molybdate, sodium silicate, sodium tetraborate and sodium gluconate have no advantages in terms of cost and inhibition efficiency, and the inhibition efficiency of the composite inhibitor is much higher than that of the single component inhibitor at the same dose. The corrosion inhibition efficiency of the composite inhibitor with concentration of 140 mg/L was 84.77% at the temperature of 50 ℃ and soaking time of 72 h. When the temperature changes, the corrosion inhibition efficiency changes little, indicating that the composite corrosion inhibitor has a certain stability. SEM surface observation confirmed the corrosion inhibition effect of the composite corrosion inhibitor on the surface of carbon steel, and XPS analysis was used to speculate the corrosion inhibition mechanism of the composite corrosion inhibitor, so as to clarify the synergistic protection mechanism of carbon steel surface corrosion inhibitor.

关 键 词：复合缓蚀剂 低碳钢 软化水 缓蚀机理 

分 类 号：TG174.42[金属学及工艺—金属表面处理]