2,3-二巯基丁二酸对铜的缓蚀性能研究

发布时间：2018-02-04 17:42

本文关键词： -二巯基丁二酸硫醇交流阻抗谱铜缓蚀剂腐蚀　出处：《表面技术》2015年10期 　论文类型：期刊论文

【摘要】：目的以马来酸为原料制备2,3-二巯基丁二酸(DMSA),研究DMSA对铜在0.5 mol/L NaOH溶液中的缓蚀作用。方法以马来酸为原料,通过加成、消去、加成再水解的方法制备2,3-二巯基丁二酸,利用红外光谱和质谱对其结构进行表征。通过静态腐蚀失重实验研究铜在添加不同含量DMSA的NaOH溶液中的腐蚀速度,采用极化曲线和交流阻抗谱技术研究铜在添加不同含量DMSA的NaOH溶液中电化学行为,并用电子扫描电镜观察铜表面腐蚀形貌。结果红外光谱和质谱结合证明,目标产物为DMSA。铜在DMSA质量浓度分别为0,2.5,5.0 g/L的NaOH溶液中的腐蚀速率分别为7.60,3.25,2.13μg/(cm2·h)。当NaOH溶液中DMSA的质量浓度为5.0 g/L时,缓蚀率可达到94.92%。结论 DMSA在铜表面的吸附能降低水分子的侵蚀,增大铜表面的腐蚀产物膜电阻和电荷转移电阻,属于阳极型缓蚀剂。
[Abstract]:Objective to study the inhibition effect of DMSA on copper corrosion in 0.5 mol/L NaOH solution using maleic acid as raw material. 2m3-dimercaptosuccinic acid was prepared by addition, elimination, addition and rehydrolysis. The structure of copper was characterized by IR and MS. The corrosion rate of copper in NaOH solution with different content of DMSA was studied by static corrosion weightlessness experiment. The electrochemical behavior of copper in NaOH solution with different content of DMSA was studied by polarization curve and AC impedance spectroscopy. The corrosion morphology of copper was observed by electron scanning electron microscope. Results the target product was DMSA.The mass concentration of copper in DMSA was 0.2.5, respectively. The corrosion rate in 5.0 g / L NaOH solution is 7.60 ~ 3.25, respectively. When the mass concentration of DMSA in NaOH solution was 5.0 g / L. Conclusion the adsorption of DMSA on copper surface can reduce the erosion of water molecules and increase the resistance of corrosion product film and charge transfer resistance on copper surface, so it belongs to anodic corrosion inhibitor.
【作者单位】：湖南师范大学化学化工学院;中国科学院宁波材料技术与工程研究所;
【基金】：国家自然科学基金(41506098) 中国科学院海洋新材料与应用技术重点实验开放基金资助(LMMT-KFKT-2014-008)~~
【分类号】：TG174.42
【正文快照】： Received:2015-06-25;Revised:2015-07-21金属铜拥有良好的导电性、导热性和优异的机械加工性能,广泛应用于印刷电路板、通信电缆、钟表以及建筑工业等领域,仅海洋工业每年消耗铜合金在十万吨以上[1]。但在酸性、碱性、高温,或者是在氯离子存在的条件下,铜会发生腐蚀而缩短其

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