模拟海水中激光熔覆 Co-WB 涂层的低温腐蚀性能

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Strength of Materials Pub Date : 2024-05-08 DOI:10.1007/s11223-024-00637-5
G. K. Zhu, H. Y. Chen, L. Fan, L. L. Han, Y. L. Shen, Q. Z. Cao, Y. Lin, L. H. Dong
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引用次数: 0

摘要

本研究采用激光熔覆技术,在 EH40 钢基材上完成了三种不同含量的球形硼化钨(WB)涂层。这些涂层包括 Co 涂层、Co+15%WB 涂层和 Co+45%WB 涂层。研究了这三种涂层在低温环境下的电化学腐蚀性能。研究结果表明,在 WB 增强 Co 基涂层中存在的相主要是 Cr23C6 和 Cr7C3、WB、WO3 以及 γ-Co。研究表明,随着涂层中硼化钨含量的增加,其耐腐蚀性能也随之增加,并逐渐下降。其中,Co+15%WB 涂层在中性溶液中的耐腐蚀性最好。在低温(-20°C)浸泡试验中,Co+45%WB 涂层在模拟海水溶液中的主要腐蚀产物是 Co(OH)2 和 Co3O4,同时还存在 WO2 和 WO3 氧化物。总之,球形硼化钨涂层显著提高了 EH40 钢基体的耐腐蚀性,为改善钢在低温环境中的性能提供了一种有效方法。
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Low-Temperature Corrosion Performance of Laser-Cladded Co-WB Coatings in Simulated Seawater

In this study, using laser cladding technology, three different coatings with varying contents of spherical tungsten boride (WB) were completed on the EH40 steel substrate. These coatings included the Co coating, Co+15%WB coating, and Co+45%WB coating. The electrochemical corrosion performance of these three coatings was investigated in a low-temperature environment. The findings indicated that the phases present in the WB-reinforced Co-based coatings are mostly Cr23C6 and Cr7C3, WB, and WO3, as well as γ-Co. The study showed that as the amount of tungsten boride in the coatings rose, their corrosion resistance increased and gradually dropped. Among them, the Co+15%WB coating exhibited the best corrosion resistance in a neutral solution. In the low-temperature (–20°C) immersion test, the main corrosion products for the Co+45%WB coating in simulated seawater solution were Co(OH)2 and Co3O4, along with the presence of WO2 and WO3 oxides. Overall, the spherical tungsten boride coatings significantly enhanced the corrosion resistance of the EH40 steel substrate, providing an effective approach to improving the steel’s performance in low-temperature environments.

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来源期刊
Strength of Materials
Strength of Materials MATERIALS SCIENCE, CHARACTERIZATION & TESTING-
CiteScore
1.20
自引率
14.30%
发文量
89
审稿时长
6-12 weeks
期刊介绍: Strength of Materials focuses on the strength of materials and structural components subjected to different types of force and thermal loadings, the limiting strength criteria of structures, and the theory of strength of structures. Consideration is given to actual operating conditions, problems of crack resistance and theories of failure, the theory of oscillations of real mechanical systems, and calculations of the stress-strain state of structural components.
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