聚多巴胺自组装膜对316L不锈钢缓蚀性能的影响
Inhibition Performance of Self-assembled Polydopamine Film on the Surface of 316L Stainless Steel
摘 要
通过浸泡组装法在316L不锈钢表面成功组装制得聚多巴胺自组装膜, 并用动电位扫描、电化学阻抗测试、扫描电镜SEM观察及傅立叶反射红外FTIR研究了多巴胺的吸附行为及其对316L不锈钢在0.9% NaCl溶液中腐蚀行为的影响。结果表明,多巴胺发生氧化和聚合反应, 并以氧原子吸附组装于试样表面; 多巴胺加量较低时加速腐蚀, 大于10 g/L可起到缓蚀作用。组装时间24 h, 组装质量浓度为20 g/L时可获得最佳缓蚀效果。
316L不锈钢
腐蚀
dopamine
316L stainless steel
corrosion
Abstract
Polydopamine film was fabricated by dipping 316L stainless steel(316L SS) substrate into an aqueous alkaline dopamine solution, and the adsorption behavior of the film and its corrosion inhibition performance for 316L SS in 0.9% NaCl solution were studied by potentiodynamic scanning, electrochemical impedance spectroscopy(EIS), attenuated total reflectance fourier transform infrared spectrum (ART-FTIR) and scanning electron microscopy (SEM). The results showed that the polydopamine membranes formed by oxidation and polymerization reaction of dopamine molecules were adsorbed onto the surface of 316L SS by the combination between oxygen and metal atoms. The assembling in low dopamine concentration acceleratee the corrosion of 316L SS,but could inhibit the corrosion in the concentration above 10 g/L. And the best corrosion inhibition performance was obtained under the conditions of 20 g/L concentration and 24h assembling time.
中图分类号 TG174.42 DOI 10.11973/fsyfh-201511006
所属栏目 试验研究
基金项目 湖北省自然科学基金(2013CFB004)
收稿日期 2014/10/30
修改稿日期
网络出版日期
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备注王海人(1966-),教授,博士,从事腐蚀与防护研究,
引用该论文: QU Jun-e,CHEN Yu-lin,ZHOU Yang,LIU Cheng,WANG Hai-ren,CAO Zhi-yong. Inhibition Performance of Self-assembled Polydopamine Film on the Surface of 316L Stainless Steel[J]. Corrosion & Protection, 2015, 36(11): 1038
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