316L不锈钢在Zn-5%Al合金液中的长期热浸镀行为研究

王邦林, 廖兴利, 柯拥军, 卢承宏, 颜财敏, 赖德林, 曾发明, 车淳山

doi:10.16577/j.issn.1001-1560.2022.0307

材料保护 >

2022 , Vol. 55 >Issue 11: 50 - 55

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0307

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316L不锈钢在Zn-5%Al合金液中的长期热浸镀行为研究

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¹温州泰昌铁塔制造有限公司； ²华南理工大学材料学院

赖德林(1989-)，博士，副研究员。主要研究方向：金属材料防腐及纳米材料制备，电话：15918428099，E - mail：flyaaa01@163.com

收稿日期: 2022-06-24

修回日期: 2022-07-26

录用日期: 2022-08-23

网络出版日期: 2023-12-25

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Study on Long - Term Hot Dipping Behavior of 316L Stainless Steel in Zn - 5%Al Alloy Melt

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(1. Wenzhou Taichang Steel Tower Manufacturing Co., Ltd., Wenzhou 325013, China;2. School of Materials, South China University of Technology, Guangzhou 510640, China)

Received date: 2022-06-24

Revised date: 2022-07-26

Accepted date: 2022-08-23

Online published: 2023-12-25

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摘要

为了明确316L不锈钢在450 ℃的Zn - 5%Al(质量分数，下同)合金液中的长期热浸镀行为，采用扫描电镜(SEM)、能谱仪(EDS)、X射线衍射仪(XRD)、电化学剥层法等测试手段，分析了Zn - Al合金液与不锈钢基体界面处金属间化合物的形成和生长规律。结果表明：在长期热浸镀过程中，Zn - Al合金液和不锈钢基体界面处始终形成一层致密而连续的Fe4Zn13(FeAl3)金属间化合物相层。该相层随浸泡时间的延长而增厚，当316L不锈钢在Zn - Al合金液中的热浸镀时间超过240 h后该相层达到生长与溶解动态平衡。不锈钢中Cr、Ni元素对FeAl3相层起到了稳定作用。连续致密且稳定的金属间化合物层是316L不锈钢在Zn - 5%Al合金液中具有良好稳定性的原因。

关键词： 316L不锈钢; 热浸镀; 金属间化合物; 相结构; 锌铝合金液

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王邦林, 廖兴利, 柯拥军, 卢承宏, 颜财敏, 赖德林, 曾发明, 车淳山 . 316L不锈钢在Zn-5%Al合金液中的长期热浸镀行为研究[J]. 材料保护, 2022 , 55(11) : 50 -55 . DOI: 10.16577/j.issn.1001-1560.2022.0307

Abstract

With the aim of researching the long - term hot dipping behavior of 316L stainless steel in Zn - 5% (mass fraction, the same below) Al alloy melt at 450 ℃, the formation and growth rules of intermetallic compounds at the interface between Zn - Al alloy melt and stainless steel substrate were analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X - ray diffractometer (XRD) and electrochemical stripping method. Results showed that during the long - term immersion process, the interface between Zn - Al alloy melt and the stainless steel substrate always maintained a dense and continuous phase layer of intermetallic compound Fe4Zn13 (FeAl3). The thickness of the layer increased with the prolongation of the immersion time, but when the hot dipping time exceeded 240 h, the growth and dissolution of the layer achieved a dynamic equilibrium. Furthermore, the Cr and Ni elements in stainless steel had a stabilizing effect on the FeAl3 phase layer. A continuously dense and stable intermetallic compound layer was the essential reason for the good corrosion resistance of 316L stainless steel in Zn - 5%Al alloy melt.

Key words： 316L stainless steel; hot dipping; intermetallic compound; phase structure; zinc aluminum alloy melt

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