油酸接枝壳聚糖/氧化石墨烯复合涂层对碳钢的腐蚀防护。

Oleic acid-grafted chitosan/graphene oxide composite coating for corrosion protection of carbon steel.

机构信息

Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar; Physical Chemistry Department, National Research Center, Dokki, Cairo, Egypt.

Department of Mechanical and Industrial Engineering, Qatar University, P.O. Box 2713, Doha, Qatar.

出版信息

Carbohydr Polym. 2016 Oct 20;151:871-878. doi: 10.1016/j.carbpol.2016.06.001. Epub 2016 Jun 1.

DOI:10.1016/j.carbpol.2016.06.001

PMID:27474635

Abstract

An anticorrosion coating film based on the formation of nanocomposite coating is reported in this study. The composite consisted of chitosan (green matrix), oleic acid, and graphene oxide (nano filler). The nanocomposite coating was arranged on the surface of carbon steel, and the corrosion resistance was monitored using electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PP). Compared to the pure chitosan (CS) coating, the corrosion resistance of oleic acid-modified chitosan/graphene oxide film (CS/GO-OA) is increased by 100 folds. Since the well-dispersed smart grafted nanolayers delayed the penetration rate of corrosive species and thus maintained long term anticorrosive stability which is correlated with hydrophobicity and permeability.

摘要

本研究报道了一种基于纳米复合涂层形成的防腐涂层。该复合材料由壳聚糖（绿色基质）、油酸和氧化石墨烯（纳米填料）组成。将纳米复合涂层布置在碳钢表面，通过电化学阻抗谱（EIS）和动电位极化（PP）监测其耐腐蚀性。与纯壳聚糖（CS）涂层相比，油酸改性壳聚糖/氧化石墨烯膜（CS/GO-OA）的耐腐蚀性提高了 100 倍。由于分散良好的智能接枝纳米层延迟了腐蚀性物质的渗透速度，从而保持了长期的防腐稳定性，这与疏水性和渗透性有关。