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典型车轮用钢在中性盐雾环境下的初期腐蚀行为研究

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  • (1.首钢集团有限公司技术研究院, 北京 100043; 2.绿色可循环钢铁流程北京市重点实验室, 北京 100043;3.首钢京唐钢铁联合有限责任公司, 河北 唐山 063200)
李浩源(1994-),硕士,助理工程师,主要研究方向热轧板带产品开发与质量提升,E-mail:739249049@qq.com

收稿日期: 2023-03-21

  修回日期: 2023-04-12

  录用日期: 2023-05-16

  网络出版日期: 2023-09-15

Study of Initial Corrosion Behavior of Typical Wheel Steel in Neutral Salt Spray Environment

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  • (1.Research Institute of Technology of Shougang Group Co., Ltd., Beijing 100043, China;2.Beijing Key Laboratory of Green Recyclable Process for Iron & Steel Production Technology, Beijing 100043, China;3.Shougang Jingtang United Iron and Steel Co., Ltd., Tangshan 063200, China)

Received date: 2023-03-21

  Revised date: 2023-04-12

  Accepted date: 2023-05-16

  Online published: 2023-09-15

摘要

为解决车轮用钢服役过程中的大气腐蚀问题,通过中性盐雾试验研究了590 MPa 和780 MPa 级别2 种汽车车轮用钢590CL 和780CL 在5%NaCl 溶液中性盐雾环境下的初期腐蚀行为,并采用辉光光谱仪、金相显微镜、扫描电子显微镜(SEM)、X 射线衍射仪(XRD)和电化学测量等手段表征了盐雾试验后腐蚀产物的形貌、结构、腐蚀速率及电化学行为。 结果表明,在中性盐雾试验48 h 后,2 种车轮用钢表面均出现红锈,二者腐蚀速率为590CL>780CL。 在3.5%NaCl 溶液中测量的极化曲线和电化学阻抗谱结果与上述结果有较好的一致性。 590CL 和780CL 这2 种钢材的腐蚀产物主要为γ-FeO(OH),还含有部分α-FeO(OH)和Fe3O4,腐蚀产物对基体基本没有保护作用。

本文引用格式

李浩源, 王姗姗, 张大伟, 肖宝亮, 魏延根 . 典型车轮用钢在中性盐雾环境下的初期腐蚀行为研究[J]. 材料保护, 2023 , 56(9) : 90 -97 . DOI: 10.16577/j.issn.1001-1560.2023.0217

Abstract

In order to solve the problem of atmospheric corrosion of wheel steels during their service,the initial corrosion behaviors of two kinds of automotive wheel steels 590CL and 780CL at 590 MPa and 780 MPa levels in neutral salt spray environment of 5% NaCl solution were studied by neutral salt spray test.The morphology, structure, corrosion rate and electrochemical behavior of corrosion products after salt spray test were characterized by glow spectrometer, metallographic microscope, scanning electron microscope (SEM), X-ray diffractometer (XRD)and electrochemical measurement.Results showed that after 48 h in the neutral salt spray test, red rust appeared on the surface of the two wheel steels, and the corrosion rates of the two were 590CL>780CL.The polarization curves and electrochemical impedance spectroscopy results measured in 3.5%NaCl solution were in good agreement with the above results.Besides, the corrosion products of 590CL and 780CL steels were mainly γ-FeO(OH), and also contained some α-FeO(OH) and Fe3O4.However, the corrosion products basically had no protective effect on the substrate.

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