CAJ | 학술논문

采用阴极极化曲线、开路电位和电化学阻抗谱,监测青铜在不同薄液膜厚度下的大气腐蚀行为.阴极极化曲线结果表明,阴极极限电流密度随着液膜的减薄而增大.电化学阻抗谱结果表明,在腐蚀初期,腐蚀速率随着液膜的减薄而增加,这主要是由于腐蚀速率是由阴极过程控制的；随着时间的延长,腐蚀程度随着液膜厚度的变化从强到弱的趋势为:150 μm,310μm,100μm,本体溶液,57 μm.开路电位和电化学阻抗谱实验较好地再现了原位电化学腐蚀信息,且电化学结果与物理表征具有良好的一致性.
채용음겁겁화곡선、개로전위화전화학조항보,감측청동재불동박액막후도하적대기부식행위.음겁겁화곡선결과표명,음겁겁한전류밀도수착액막적감박이증대.전화학조항보결과표명,재부식초기,부식속솔수착액막적감박이증가,저주요시유우부식속솔시유음겁과정공제적；수착시간적연장,부식정도수착액막후도적변화종강도약적추세위:150 μm,310μm,100μm,본체용액,57 μm.개로전위화전화학조항보실험교호지재현료원위전화학부식신식,차전화학결과여물리표정구유량호적일치성.
The atmospheric corrosion behavior of bronze under thin electrolyte layer (TEL) with different thicknesses was monitored using cathodic polarization curves,open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS).Cathodic polarization result indicates that the cathodic limiting current density increases with decreasing the TEL thickness.EIS result shows that the corrosion rate increases with decreasing the TEL thickness at the initial stage because the corrosion is dominated by the cathodic process,whereas after long immersion time,the corrosion degree with the TEL thickness is in the sequence of 150 μm ＞ 310μm ＞100 μm ≈ bulk solution ＞ 57 μm.The measurements of OCP and EIS present in-situ electrochemical corrosion information and their results are in good agreement with that of physical characterizations.