CAJ | 학술논문

应用电化学阻抗谱技术研究镀锡薄钢板在0.5 mol/L NaCl溶液中的腐蚀过程,结合SEM、SPM、XRD、XPS技术表征腐蚀产物的形貌和腐蚀产物的结构.结果表明:腐蚀过程中镀锡层的电阻Rc值基本不变而电荷转移电阻Rct值下降了2个数量级,表明镀锡层基本没有发生腐蚀而基底金属碳钢则不断遭到腐蚀.镀锡薄钢板在0.5 mol/L NaCl溶液中的腐蚀类型主要是对镀锡层缺陷处暴露的基底金属碳钢的腐蚀,其腐蚀产物主要是γ-FeOOH.
응용전화학조항보기술연구도석박강판재0.5 mol/L NaCl용액중적부식과정,결합SEM、SPM、XRD、XPS기술표정부식산물적형모화부식산물적결구.결과표명:부식과정중도석층적전조Rc치기본불변이전하전이전조Rct치하강료2개수량급,표명도석층기본몰유발생부식이기저금속탄강칙불단조도부식.도석박강판재0.5 mol/L NaCl용액중적부식류형주요시대도석층결함처폭로적기저금속탄강적부식,기부식산물주요시γ-FeOOH.
The corrosion process of tinplate in 0.5 mol/L NaCl solution was investigated using the electrochemical impedance spectroscopy (EIS),and the morphology and structure of the corrosion products were characterized by scanning electron microscope (SEM),scanning probe microscopy (SPM),X-ray diffraction (XRD) and X-ray photoclectron spectroscopy (XPS).The results showed that the resistance of tin coating,Rc,was essentially constant but the charge transfer resistance,Rct,decreased by 2 orders of magnitude,which indicated that the tin coating was not seriously corroded while the carbon steel substrate was corroded continuously.The corrosion of tinplate in 0.5 mol/L NaCl solution was mainly the dissolution of carbon steel substrate because of the defects in the tin layer and the corrosion product was mainly γ-FeOOH.