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Highly durable macromolecular epoxy resin as anticorrosive coating material for carbon steel in 3% NaCl: Computational supported experimental studies
Journal of Applied Polymer Science ( IF 3 ) Pub Date : 2020-01-20 , DOI: 10.1002/app.49003
Omar Dagdag 1, 2 , Avni Berisha 3 , Zaki Safi 4 , Saïd Dagdag 5 , Majda Berrani 6 , Shehdeh Jodeh 7 , Chandrabhan Verma 8, 9 , Eno E. Ebenso 8, 9 , Nuha Wazzan 10 , Ahmed El Harfi 1
Affiliation  

The purpose of present study is in the direction of development of an anticorrosive coating formulation of high durability for carbon steel corrosion in 3 wt% NaCl medium. The formulation comprises of a macromolecular epoxy coating (DGEDDS‐MDA) based bisphenol S diglycidyl ether (DGEDDS) cured with a methylene dianiline (MDA). The formulation was characterized by FT‐IR spectroscopy method. Performance of the epoxy coating was represented using PDP and EIS approaches. The formulation acts as effective anticorrosive coating for long durability (180 days). Surfaces of the specimens before and after 180 days exposure to UV radiation were examined using SEM. PDP, SEM, and EIS studies showed that DGEDDS‐MDA acted as highly durable and effective anticorrosive formulation. Results also showed that the formulation acts as interface type inhibitor and its presence enhances the polarization resistance (R p) value. DFT study suggests that the formulation DGEDDS‐MDA possesses strong ability to interact with metal surface through its several electron rich centers. MD and MC simulations showed that studied formulation effectively adsorb on the substrate (metallic surface). Results of EIS, PDP, and SEM studies (experimental) were well‐supported by DFT, MD, and MC (computational) simulations.

中文翻译:

高度耐用的高分子环氧树脂作为碳钢在3%NaCl中的防腐涂料:计算支持的实验研究

本研究的目的是开发一种在3 wt%NaCl介质中对碳钢腐蚀具有高耐久性的防腐涂料配方。该配方包含基于大分子环氧涂料(DGEDDS-MDA)的双酚S二缩水甘油醚(DGEDDS),并用亚甲基二苯胺(MDA)固化。通过FT-IR光谱法对该制剂进行表征。环氧涂层的性能用PDP和EIS方法表示。该配方可作为有效的防腐涂料,使用寿命长(180天)。使用SEM检查在暴露于UV辐射180天之前和之后的样品表面。PDP,SEM和EIS研究表明,DGEDDS‐MDA可作为高度耐用且有效的防腐剂。R p)值。DFT研究表明,DGEDDS‐MDA配方具有通过其多个富电子中心与金属表面相互作用的强大能力。MD和MC模拟表明,所研究的配方可有效吸附在基材(金属表面)上。EIS,PDP和SEM研究(实验)的结果得到DFT,MD和MC(计算)仿真的充分支持。
更新日期:2020-01-20
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