Li Yuhuan,Cao Xianlong *,Tian Weiwei,et al.Electrochemical study on corrosion inhibition of expired medical drug on magnesium alloy[J].Plating & Finishing,2023,(9):85-94.[doi:10.3969/j.issn.1001-3849.2023.09.014]
过期医疗药品对镁合金缓蚀作用的电化学研究
- Title:
- Electrochemical study on corrosion inhibition of expired medical drug on magnesium alloy
- Keywords:
- magnesium alloy ; corrosion inhibitor ; expired medical drugs ; electrochemical impedance spectroscopy ; corrosion inhibition behavior
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 为了研究过期医疗药品作为镁合金缓蚀剂的可能性,采用电化学测试技术研究评价了过期医疗药品甘桔冰梅片浓度、温度和浸泡时间对镁合金 AZ91D 缓蚀行为的影响。结果表明:甘桔冰梅片对 AZ91D 镁合金具有缓蚀作用且属于阳极型缓蚀剂,与空白镁合金相比,添加甘桔冰梅片后镁合金的腐蚀电位正移接近 100 mV ,腐蚀电流密度从 1.36×10 -5 A/cm 2 降低到 1.06×10 -6 A/cm 2 。随着甘桔冰梅片浓度的增加, AZ91D 镁合金的交流阻抗值呈现先增加后减少的趋势;而随着温度的增加,镁合金交流阻抗值逐渐减小;随着浸泡时间的延长,缓蚀性能逐渐增强。在缓蚀剂浓度 1.00 g/L 、温度为 20 ℃ 时,甘桔冰梅片缓蚀率最高可达 84.90 % 。
- Abstract:
- : In order to study the possibility of expired medical drugs as corrosion inhibitors for magnesium alloy , the effects of concentration of expired medical drugs Citrus Ice Plum Tablets ( GJBMP ), temperature and soaking time on the corrosion inhibition behavior of magnesium alloy AZ91D were studied by electrochemical testing technology. The results showed that GJBMP had corrosion inhibition effect on AZ91D magnesium alloy and belonged to the anodic corrosion inhibitor. Compared with the blank magnesium alloy , the corrosion potential of the magnesium alloy increased to nearly 100 mV , and the corrosion current density decreased from 1.36×10 -5 A/cm 2 to 1.06×10 -6 A/cm 2 . The electrochemical impedance of magnesium alloy AZ91D increased first and then decreased with the increase of the concentration of GJBMP , and the impedance decreased with the increase of temperature. With t he extension of soaking time , the corrosion inhibition property was gradually enhanced. When the concentration of inhibitor was 1.00 g/L and the temperature was 20 ℃ , the highest inhibition efficiency can reach 84.90 %.
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备注/Memo
收稿日期: 2022-11-01 修回日期: 2022-11-18 作者简介: 李雨洹( 1998 —),男,硕士研究生, email : 1345257021@qq.com * 通信作者: 曹献龙( 1980 —),男,博士,教授,主要从事腐蚀与防护研究。 email : xianlong@cqust.edu.cn