Aging behavior difference between aqueous coatings and solvent coatings in sulfuric acid environment

IF 4.7 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2024-05-16 DOI:10.1108/acmm-07-2023-2849

He Wang, Zhiguo Li, Haifei Zhou, Zhengqiang Zhou, Wei Lu, Pengzhen Wang, Jiagang Zhang, Jin Gao, Pan Yi

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Abstract

Purpose This paper aims to compare the aging behavior of water-based coatings and solvent-based coatings in sulfuric acid environments and to discuss the related mechanism. Design/methodology/approach A sulfuric acid solution with a concentration of 5 Wt.% was selected for immersion test at 23°C. The failure behavior of the coating was studied by combining the transformation rules of the macroscopic morphology and basic properties with the results of electrochemical impedance spectrum analysis. Findings The results showed that the surface smoothness of the water-based coating was lower than that of the solvent-based coating. The glossiness, thickness and hardness of the water-based coating exhibited more significant changes. The electrochemical test also indicated that the water-based coating was infiltrated by a large number of corrosive media, which may have induced corrosion under the coating. In contrast, the solvent-based coating showed good shielding properties, but the adhesion was seriously affected by the corrosive medium. Originality/value This work clarified the difference of failure behavior and mechanism between water-based coatings and solvent-based coatings in acidic environment and provided a theoretical basis for the selection and mechanism research of anticorrosive coatings.

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水性涂料和溶剂涂料在硫酸环境中的老化行为差异

目的本文旨在比较水性涂料和溶剂型涂料在硫酸环境中的老化行为，并探讨相关机理。设计/方法/途径选用浓度为 5 Wt.% 的硫酸溶液在 23°C 下进行浸泡试验。结果表明，水基涂层的表面光滑度低于溶剂基涂层。水基涂层的光泽度、厚度和硬度的变化更为显著。电化学测试也表明，水基涂层中渗入了大量腐蚀性介质，可能会引起涂层下的腐蚀。原创性/价值该研究阐明了酸性环境中水性涂料和溶剂型涂料失效行为和机理的差异，为防腐涂料的选择和机理研究提供了理论依据。

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来源期刊

ACS Applied Bio Materials Chemistry-Chemistry (all)

CiteScore

9.40

自引率

2.10%

发文量

464

期刊介绍： ACS Applied Bio Materials is an interdisciplinary journal publishing original research covering all aspects of biomaterials and biointerfaces including and beyond the traditional biosensing, biomedical and therapeutic applications. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important bio applications. The journal is specifically interested in work that addresses the relationship between structure and function and assesses the stability and degradation of materials under relevant environmental and biological conditions.