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首页> 外文期刊>International Journal of Electrochemical Science >Corrosion Inhibition of Polydopamine Nanoparticles on Mild Steel in Hydrochloric Acid Solution
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Corrosion Inhibition of Polydopamine Nanoparticles on Mild Steel in Hydrochloric Acid Solution

机译：盐酸溶液中聚多巴胺纳米颗粒对低碳钢的缓蚀性能

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摘要

The spherical polydopamine (PDA) nanoparticles with a uniform particle size around 230nm were synthesized successfully by self-polymerization of dopamine hydrochloride in Tris-buffer solution. The inhibitor effects of PDA nanopartilces on mild steel in 1 M HCl were investigated by weight loss, potentiodynamic polarization, electrochemical impedance (EIS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The results confirmed that PDA nanopartilces adsorbed onto the mild steel surface and efficiently inhibited the corrosion process. The inhibition efficiency of polydopamine inhibitor was up to 86% at a concentration of 40 mol/L, and the adsorption obeyed Langmuir adsorption isotherm. Meanwhile, potentiodynamic polarization studies showed that the corrosion inhibitor was a mixed inhibitor. SEM and AFM further confirmed the formation of a protective film on the mild steel surface.
机译：通过盐酸多巴胺在Tris-缓冲溶液中的自聚合，成功地合成了粒径约230nm的球形聚多巴胺（PDA）纳米颗粒。通过失重，电位动力学极化，电化学阻抗（EIS），扫描电子显微镜（SEM）和原子力显微镜（AFM）研究了PDA纳米颗粒对1 M HCl中低碳钢的抑制作用。结果证实，PDA纳米颗粒吸附在低碳钢表面上并有效地抑制了腐蚀过程。在浓度为40 mol / L的条件下，聚多巴胺抑制剂的抑菌率高达86％，吸附符合Langmuir吸附等温线。同时，电位动力极化研究表明腐蚀抑制剂是一种混合抑制剂。 SEM和AFM进一步证实了在低碳钢表面上形成了保护膜。

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