CAJ | 학술논문

应用电化学阻抗谱(EIS)技术,结合扫描电镜(SEM)、能量散射X射线谱(EDS)、X射线光电子能谱(XPS)、扫描探针显微镜(SPM)等表面分析技术,研究了镀锡薄钢板在功能饮料中的腐蚀过程并探讨了腐蚀机制.结果表明:浸泡前期,EIS低频阻抗模值的增加与前31 h镀锡薄钢板表面形成的腐蚀产物膜有关;随着浸泡时间的增加,EIS低频阻抗模值有所下降,这与腐蚀产物膜的部分脱落以及暴露的基底金属碳钢的腐蚀有关.镀锡薄钢板在功能饮料中浸泡24天后其表面的腐蚀产物膜由外层的富锡层和内层的富铁层组成,XPS结果表明其成分主要是Sn(Ⅱ)/Sn(Ⅳ)与柠檬酸阴离子及Fe(Ⅲ)与柠檬酸阴离子组成的化合物,其腐蚀类型主要是功能饮料中的有机酸对镀锡薄钢板的腐蚀.
응용전화학조항보(EIS)기술,결합소묘전경(SEM)、능량산사X사선보(EDS)、X사선광전자능보(XPS)、소묘탐침현미경(SPM)등표면분석기술,연구료도석박강판재공능음료중적부식과정병탐토료부식궤제.결과표명:침포전기,EIS저빈조항모치적증가여전31 h도석박강판표면형성적부식산물막유관;수착침포시간적증가,EIS저빈조항모치유소하강,저여부식산물막적부분탈락이급폭로적기저금속탄강적부식유관.도석박강판재공능음료중침포24천후기표면적부식산물막유외층적부석층화내층적부철층조성,XPS결과표명기성분주요시Sn(Ⅱ)/Sn(Ⅳ)여저몽산음리자급Fe(Ⅲ)여저몽산음리자조성적화합물,기부식류형주요시공능음료중적유궤산대도석박강판적부식.
In this paper,the corrosion process of a tinplate in a functional beverage was investigated using electrochemical impedance spectroscope (EIS),scanning electron microscopy (SEM),energy dispersive X-ray spectroscopy (EDS),scanning probe microscopy (SPM),and X-ray photoelectron spectroscopy (XPS),and a corrosion mechanism is proposed.We conclude that an increase in the impedance modulus at low frequency is due to the corrosion product forming on the surface of the tinplate over the first 31 h.With an increase in the immersion time a decrease in the impedance modulus at low frequency is due to the detachment of the corrosion product and the corrosion of the carbon steel substrate.X-ray photoelectron spectroscopy (XPS) results show that the corrosion product is mainly composed of a Sn(Ⅱ)/Sn(Ⅳ) citrate complex or an Fe(Ⅲ) citrate complex.Furthermore,the corrosion product film is first enriched with Sn and then enriched with Fe after immersion in functional beverage for 24 d.We propose that the tinplate is mainly corroded by the organic acids that exist in functional beverages.