Correlation between the initial aging of epoxy coatings and the typical marine atmospheric environmental factors

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Anti-corrosion Methods and Materials Pub Date : 2023-11-03 DOI:10.1108/acmm-09-2023-2894

Dongdong Song, Wenxiang Qin, Qian Zhou, Dong Xu, Bo Zhang

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引用次数: 0

Abstract

Purpose The anticorrosion coatings used in marine and atmospheric environment are subjected to many environmental factors. And the aging failure has been puzzling researchers. The purpose of this study is to find the correlation between the initial aging of epoxy coatings and the typical marine atmospheric environmental factors. Design/methodology/approach The epoxy coatings were subjected to a one-year exposure in three typical marine atmospheres. Meanwhile, principal component analysis, linear regression and Spearman and gray correlation analysis were applied to quantify the environmental characteristics and establish correlations with the coating aging. Findings The results indicate that the coating will undergo macroscopic fading and chalking upon exposure to the marine atmosphere, while microscopic examination reveals holes, cracks and partial peeling. The adhesion performance and electrochemical properties of the coating deteriorated with prolonged exposure, coating aging mainly occurs with the generation of O-H bonds and the breakage of molecular chains such as C-N and C-O-C. The coating was most deeply aged after exposure to the Xisha, followed by Zhoushan and finally Qingdao. Environmental factors affect the photooxidative aging and hydrolytic degradation processes of coatings and thus coating aging. To further demonstrate the correlation between environmental factors and coating aging, principal component analysis was used. The correlation model between environmental factors and coating aging was subsequently obtained. The correlation model between the rate of coating adhesion loss ( E ) and the comprehensive evaluation parameter of environmental factors ( Z ) is expressed as E = 0.142 + 0.028 Z . Meanwhile, the Spearman correlation analysis and gray correlation method were used to investigate the impact of each environmental factor on coating aging. Solar irradiation, relative humidity and wetting time have the highest correlation with coating aging, which are all above 0.8 and have the greatest influence on coating aging; wind speed and temperature have the smallest correlation with coating aging, which are about 0.6 and have the least influence on coating aging. Originality/value This paper establishes a correlation between typical marine environmental factors and coating aging performance, which is crucial for predicting the service life of other coatings in diverse environments.

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环氧涂料初老化与典型海洋大气环境因素的相关性研究

目的在海洋和大气环境中使用的防腐涂料受多种环境因素的影响。而这种衰老失败一直困扰着研究人员。本研究的目的是找出环氧涂料初老化与典型海洋大气环境因素的相关性。设计/方法/方法环氧涂层在三种典型的海洋大气中暴露一年。同时，运用主成分分析、线性回归分析、Spearman和灰色关联分析等方法对环境特征进行量化，建立与涂层老化的相关性。结果表明，涂层暴露于海洋大气中，宏观上出现褪色和白垩，微观上出现孔洞、裂纹和局部剥落。涂层的粘附性能和电化学性能随着暴露时间的延长而变差，涂层老化主要发生在O-H键的生成和C-N、C-O-C等分子链的断裂。西沙暴露后涂层老化最深，其次是舟山，最后是青岛。环境因素影响涂料的光氧化老化和水解降解过程，从而影响涂料的老化。为了进一步证明环境因素与涂层老化之间的相关性，采用主成分分析方法。建立了环境因素与涂层老化的相关模型。涂层附着损失率(E)与环境因素综合评价参数(Z)的相关模型表示为E = 0.142 + 0.028 Z。同时，采用Spearman关联分析法和灰色关联法研究各环境因素对涂层老化的影响。太阳辐照度、相对湿度和润湿时间与涂层老化的相关性最高，均在0.8以上，对涂层老化的影响最大;风速和温度与涂层老化的相关性最小，均在0.6左右，对涂层老化的影响最小。本文建立了典型海洋环境因素与涂层老化性能之间的相关性，这对预测其他涂层在不同环境下的使用寿命具有重要意义。

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.