Evaluation of adhesion of epoxy resin sealant to improve the corrosion resistance of thermal sprayed coatings

IF 1.68 Q2 Dentistry

Applied Adhesion Science Pub Date : 2020-09-24 DOI:10.1186/s40563-020-00130-7

Mateus R. D. Carneiro, Bruno C. Freitas, Iuri B. de Barros, José B. de Campos, Ivan N. Bastos, Hector R. M. Costa

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引用次数: 1

Abstract

The adhesion of coatings on a given substrate has fundamental importance on a coating/substrate system's functionality. The current paper presents the adhesion strength results of FeCr and CoCr-based deposits produced by the electric arc thermal spray process on carbon steel, with an intermediate layer of 95Ni5Al. Three chemical compositions were tested for coating deposition and were characterized using plate and tube specimens made of carbon steel UNS?G10200 to result in a screening of performance. Microstructural evaluation by optical microscopy (OM), scanning electron microscopy (SEM), and X-ray diffraction (XRD) were performed. Coating strength was measured using the standard pull-off test method. The corrosion resistance was analyzed with salt spray exposure, electrochemical polarization, and impedance spectroscopy (EIS) tests. The adhesion strength of FeCr and CoCr alloy coatings shows an overall average tensile strength of 27.2?MPa. All sealed conditions presented low corrosion and the samples with epoxy sealant exhibited a high resistance against corrosion. The X-ray diffraction results have revealed alpha and gamma FeCr alloys and chromite as deposited phases after the coating process.

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环氧树脂密封胶对提高热喷涂涂料耐腐蚀性能的附着力评价

涂层在给定基材上的附着力对涂层/基材系统的功能至关重要。本文介绍了电弧热喷涂工艺在碳钢上制备的以95Ni5Al为中间层的FeCr和cocr基镀层的粘接强度结果。对三种化学成分进行了涂层沉积测试，并使用碳钢UNS制成的板和管样品进行了表征。G10200导致性能筛选。通过光学显微镜(OM)、扫描电镜(SEM)和x射线衍射(XRD)进行了显微结构评价。采用标准拉伸试验方法测定涂层强度。通过盐雾暴露、电化学极化和阻抗谱(EIS)测试分析了材料的耐蚀性。结果表明，fer和CoCr合金涂层的整体平均抗拉强度为27.2 MPa。所有密封条件下的腐蚀都很低，环氧密封胶的样品具有很高的耐腐蚀性。x射线衍射结果表明，涂层后沉积了α、γ铁铁合金和铬铁矿。

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来源期刊

Applied Adhesion Science Dentistry-Dentistry (miscellaneous)

自引率

0.00%

发文量

审稿时长

13 weeks

期刊介绍： Applied Adhesion Science focuses on practical applications of adhesives, with special emphasis in fields such as oil industry, aerospace and biomedicine. Topics related to the phenomena of adhesion and the application of adhesive materials are welcome, especially in biomedical areas such as adhesive dentistry. Both theoretical and experimental works are considered for publication. Applied Adhesion Science is a peer-reviewed open access journal published under the SpringerOpen brand. The journal''s open access policy offers a fast publication workflow whilst maintaining rigorous peer review process.