A study on the influence of silanized clay on the barrier, hydrophobic and mechanical properties of epoxy coated steel in natural seawater

IF 2.9 4区材料科学 Q2 ENGINEERING, CHEMICAL

Journal of Adhesion Pub Date : 2023-01-01 DOI:10.1080/00218464.2022.2163892

J. Xavier, Raja Beryl J, R. N

{"title":"A study on the influence of silanized clay on the barrier, hydrophobic and mechanical properties of epoxy coated steel in natural seawater","authors":"J. Xavier, Raja Beryl J, R. N","doi":"10.1080/00218464.2022.2163892","DOIUrl":null,"url":null,"abstract":"ABSTRACT Diethoxy(3-glycidyloxypropyl) methylsilane (GPMS), a surface modification agent, is used to give halloysite nanoparticles a hydrophobic behaviour and improve their ability to disperse in epoxy polymers (EP). Surface roughness and hydrophobicity (WCA: 144°) are both quite high in EP-GPMS/Clay coatings. The corrosion behavior of coated steel surfaces was investigated using electrochemical methods. The EP-GPMS/clay nanocomposite coating was shown to have about 63 times higher coating resistance than the EP coating. The EP-GPMS/Clay displayed better coating resistance (6687.71 kΩ.cm2) and a lower corrosion current density (4.25 μA/cm2) than plain epoxy (1.01 kΩ.cm2; 287.21 μA/cm2) even after prolonged exposure to the electrolyte, according to electrochemical studies. Compared to the pure EP (0.0599 mm/year), the EP-GPMS/clay coated sample had the lowest corrosion rate (0.0017 mm/year). According to SECM data, at 15 d of immersion, the Fe dissipation at the surface of the EP-GPMS/Clay coating (2.6 nA) is much smaller than the plain EP (14.7 nA). Additionally, the EP-GPMS/Clay showed enhanced adhesive properties. The EP with silanized clay offers an outstanding oxygen and water repellent, hydrophobic, and barrier properties. Due to the environmental safety of clay/silane, this kind of coating might be employed as a workable coating substance for industrial applications.","PeriodicalId":14778,"journal":{"name":"Journal of Adhesion","volume":"99 1","pages":"1889 - 1915"},"PeriodicalIF":2.9000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Adhesion","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1080/00218464.2022.2163892","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 6

Abstract

ABSTRACT Diethoxy(3-glycidyloxypropyl) methylsilane (GPMS), a surface modification agent, is used to give halloysite nanoparticles a hydrophobic behaviour and improve their ability to disperse in epoxy polymers (EP). Surface roughness and hydrophobicity (WCA: 144°) are both quite high in EP-GPMS/Clay coatings. The corrosion behavior of coated steel surfaces was investigated using electrochemical methods. The EP-GPMS/clay nanocomposite coating was shown to have about 63 times higher coating resistance than the EP coating. The EP-GPMS/Clay displayed better coating resistance (6687.71 kΩ.cm2) and a lower corrosion current density (4.25 μA/cm2) than plain epoxy (1.01 kΩ.cm2; 287.21 μA/cm2) even after prolonged exposure to the electrolyte, according to electrochemical studies. Compared to the pure EP (0.0599 mm/year), the EP-GPMS/clay coated sample had the lowest corrosion rate (0.0017 mm/year). According to SECM data, at 15 d of immersion, the Fe dissipation at the surface of the EP-GPMS/Clay coating (2.6 nA) is much smaller than the plain EP (14.7 nA). Additionally, the EP-GPMS/Clay showed enhanced adhesive properties. The EP with silanized clay offers an outstanding oxygen and water repellent, hydrophobic, and barrier properties. Due to the environmental safety of clay/silane, this kind of coating might be employed as a workable coating substance for industrial applications.

查看原文本刊更多论文

硅烷化粘土对环氧涂层钢在天然海水中的阻隔性、疏水性和力学性能影响的研究

摘要二乙氧基（3-缩水甘油基氧基丙基）甲基硅烷（GPMS）是一种表面改性剂，用于赋予海洛石纳米粒子疏水性，提高其在环氧聚合物（EP）中的分散能力。EP-GPMS/粘土涂层的表面粗糙度和疏水性（WCA:144°）都很高。采用电化学方法研究了涂层钢表面的腐蚀行为。EP-GPMS/粘土纳米复合涂层显示出比EP涂层高约63倍的涂层电阻。EP-GPMS/粘土显示出更好的涂层电阻（6687.71 kΩ.cm2），腐蚀电流密度（4.25μa/cm2）低于普通环氧树脂（1.01kΩ.cm2；287.21μA/cm2）。与纯EP（0.0599 mm/年）相比，EP-GPMS/粘土涂层样品的腐蚀速率最低（0.0017 mm/年。根据SECM数据，在浸渍15 d时，EP-GPMS/粘土涂层表面的Fe耗散（2.6 nA）远小于普通EP（14.7 nA）。此外，EP-GPMS/粘土显示出增强的粘合性能。含有硅烷化粘土的EP具有出色的拒氧、防水、疏水和阻隔性能。由于粘土/硅烷的环境安全性，这种涂层可能被用作工业应用的可行涂层物质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Adhesion 工程技术-材料科学：综合

CiteScore

5.30

自引率

9.10%

发文量

审稿时长

1 months

期刊介绍： The Journal of Adhesion is dedicated to perpetuating understanding of the phenomenon of adhesion and its practical applications. The art of adhesion is maturing into a science that requires a broad, coordinated interdisciplinary effort to help illuminate its complex nature and numerous manifestations.