Conductive Polymer/SiO2 Composite as an Anticorrosive Coating Against Carbon Dioxide Corrosion of Mild Steel. A Simulation Study

IF 0.5 Q4 CHEMISTRY, MULTIDISCIPLINARY Eurasian Chemico-Technological Journal Pub Date : 2020-12-28 DOI:10.18321/ectj991
Kh. Avchukir, B. D. Burkitbayeva
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引用次数: 2

Abstract

In this work corrosion of mild steel affected by carbon dioxide was studied using a simulation model developed by Nordsveen M. and Nesic S. Using this comprehensive model of the uniform corrosion made possible to predict of corrosion rate of steel in the carbonic acid medium and the influence of different conditions on the anticorrosive property of coated electrode has been investigated. 1D model of corrosion process includes Butler-Volmer and Tafel equations and takes into account both the kinetics of anodic dissolution of an iron and electrochemical discharge of carbonic acid, water and hydrogen ions. The model has been created in COMSOL Multiphysics software and further improvement of this model allowed studying the influence of parameters such as solution composition, the partial pressure of CO2, temperature and flow velocity of the solution on the corrosion rate of the steel. The results of numerical simulation demonstrate that the use of conductive polymerpolypyrrole/ SiO2 composite as an anti-corrosive resin coating reduces the corrosion rate of mild steel by 7 times or more, depending on pH, temperature and flow rate. Furthermore, increasing of flow velocity from 0.1 to 10 m/s affects to the removal of corrosion products from the surface of mild steel and as a result corrosion rate raises from 0.3 to 0.45 mm/year at a temperature of 80 °C and pH=4.
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导电聚合物/SiO2复合材料作为低碳钢二氧化碳腐蚀的防腐涂层。模拟研究
在这项工作中,使用Nordsveen M.和Nesic S.开发的模拟模型研究了二氧化碳对低碳钢腐蚀的影响。使用这种均匀腐蚀的综合模型可以预测钢在碳酸介质中的腐蚀速率,并研究了不同条件对涂层电极防腐性能的影响。腐蚀过程的一维模型包括Butler-Volmer和Tafel方程,同时考虑了铁的阳极溶解动力学和碳酸、水和氢离子的电化学放电。该模型是在COMSOL Multiphysics软件中创建的,进一步改进该模型可以研究溶液组成、CO2分压、温度和溶液流速等参数对钢的腐蚀速率的影响。数值模拟结果表明,使用导电聚合物聚吡咯/ SiO2复合材料作为防腐树脂涂层,根据pH、温度和流速的不同,可使低碳钢的腐蚀速率降低7倍以上。在温度为80℃、pH=4的条件下,流速从0.1 m/s增加到10 m/s对低碳钢表面腐蚀产物的去除有影响,腐蚀速率从0.3 mm/年增加到0.45 mm/年。
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来源期刊
Eurasian Chemico-Technological Journal
Eurasian Chemico-Technological Journal CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
1.10
自引率
20.00%
发文量
6
审稿时长
20 weeks
期刊介绍: The journal is designed for publication of experimental and theoretical investigation results in the field of chemistry and chemical technology. Among priority fields that emphasized by chemical science are as follows: advanced materials and chemical technologies, current issues of organic synthesis and chemistry of natural compounds, physical chemistry, chemical physics, electro-photo-radiative-plasma chemistry, colloids, nanotechnologies, catalysis and surface-active materials, polymers, biochemistry.
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