高铁转向架用钢<strong>G390NH</strong>在模拟海洋和工业大气环境下的腐蚀行为及产物演化规律

doi:10.11900/0412.1961.2021.00366

金属学报

2023, Vol. 59

Issue (11): 1487-1498 DOI: 10.11900/0412.1961.2021.00366

本期目录 | 过刊浏览

高铁转向架用钢G390NH在模拟海洋和工业大气环境下的腐蚀行为及产物演化规律

宋嘉良¹^,², 江紫雪¹^,², 易盼³, 陈俊航¹^,², 李曌亮¹^,², 骆鸿¹^,²(

), 董超芳¹^,², 肖葵¹^,²(

)

^1.北京科技大学新材料技术研究院北京 100083
^2.北京科技大学腐蚀与防护中心北京 100083
^3.中国电力科学研究院有限公司北京 100192

Corrosion Behavior and Product Evolution of Steel for High-Speed Railway Bogie G390NH in Simulated Marine and Industrial Atmospheric Environment

SONG Jialiang¹^,², JIANG Zixue¹^,², YI Pan³, CHEN Junhang¹^,², LI Zhaoliang¹^,², LUO Hong¹^,²(

), DONG Chaofang¹^,², XIAO Kui¹^,²(

)

^1.Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
^2.Corrosion and Protection Center, University of Science and Technology Beijing, Beijing 100083, China
^3.China Electric Power Research Institute Co., Ltd., Beijing 100192, China

引用本文:

宋嘉良, 江紫雪, 易盼, 陈俊航, 李曌亮, 骆鸿, 董超芳, 肖葵. 高铁转向架用钢G390NH在模拟海洋和工业大气环境下的腐蚀行为及产物演化规律[J]. 金属学报, 2023, 59(11): 1487-1498.
Jialiang SONG, Zixue JIANG, Pan YI, Junhang CHEN, Zhaoliang LI, Hong LUO, Chaofang DONG, Kui XIAO. Corrosion Behavior and Product Evolution of Steel for High-Speed Railway Bogie G390NH in Simulated Marine and Industrial Atmospheric Environment[J]. Acta Metall Sin, 2023, 59(11): 1487-1498.

全文: PDF(3697 KB) HTML

摘要:

通过周浸实验结合腐蚀动力学、常规电化学、微观形貌及腐蚀产物成分分析等方法，研究了在模拟加速海洋和工业大气环境下高铁转向架用钢G390NH的腐蚀行为和产物层的演化规律。结果表明，与$SO_{3}^{2-}$相比，Cl^-具有更强的穿透能力，生成的锈层以非稳态的Fe₃O₄和γ-FeOOH为主，该锈层并不能提供非常有效的防护，造成钢的腐蚀速率始终大于6 g/(m²·h)。在酸性$SO_{3}^{2-}$环境中，内锈层中富集了耐蚀的Cu，促进了α-FeOOH的生成，增加了锈层在酸性$SO_{3}^{2-}$环境中的抗腐蚀能力。

关键词 ：转向架用钢, 周浸实验, 大气腐蚀, 工业大气, 海洋大气, 腐蚀行为

Abstract：

Atmospheric corrosion is ubiquitous in transportation, infrastructure, and other areas, and it always reduces the service life of materials. Bogie, an important component of the high-speed railway, performs bearing, guiding, damping, traction, and braking. The safe operation of the high-speed railway is inextricably linked to its service performance. However, for the high-speed railway bogie, its service environment constantly changes as per the operation of the train and being in various atmospheric environments, such as the ocean, pollution, damp-heat, and severe cold for a long time. Therefore, special attention must be paid to the effect of atmospheric corrosion on its service life. The use of weathering steel in bogie has effectively balanced the cost and service life. With the advancement of science and social growth, previous materials are no longer capable of meeting the current service life requirements. G390NH is provided for investigation as a newly designed weathering steel for the bogie. In this study, the corrosion behavior and the product layer evolution law of high-speed rail bogie steel G390NH in simulated marine and industrial atmospheric environments are investigated using periodic wetting tests combined with corrosion kinetics, conventional electrochemistry, microscopic morphology, and corrosion product composition analysis. It demonstrates that the two ions (Cl^- and $SO_{3}^{2-}$) have different corrosion mechanisms on the material. In simulated marine atmosphere environment, Cl^- has a higher penetrating capacity, and the rust layer consists of unsteady Fe₃O₄ and γ-FeOOH; furthermore, coupled with the effect of alternating dry and wet, corrosion always maintains a high rate and the rust layer does not give a very effective protection function. However, in the acidic $SO_{3}^{2-}$ environment, although the corrosion is accelerated, a layer of corrosion-resistant Cu is enriched in the inner rust layer and simultaneously, and a large amount of α-FeOOH is promoted, which greatly enhances the corrosion resistance of the rust layer.

Key words： bogie steel cycle immersion test atmospheric corrosion industrial atmosphere marine atmosphere corrosion behavior

收稿日期: 2021-08-30

ZTFLH:

TG171

基金资助:国家重点研发计划项目(2017YFB0304602);海洋装备用金属材料及其应用国家重点实验室开放基金项目(SKLMEA-K201908);表面物理与化学重点实验室学科发展基金项目(XKFZ201906)

通讯作者: 肖葵，xiaokui@ustb.edu.cn，主要从事材料腐蚀与防护方面的研究；
骆鸿，luohong@ustb.edu.cn，主要从事先进金属、钢铁材料的设计和服役安全方面的研究

Corresponding author: XIAO Kui, professor, Tel: (010)62333975, E-mail: xiaokui@ustb.edu.cn;
LUO Hong, professor, Tel: (010)62334300, E-mail: luohong@ustb.edu.cn

作者简介: 宋嘉良，男，1995年生，博士生

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图1 G390NH显微组织的OM像

图2 G390NH在3.5%NaCl和0.01 mol/L NaHSO3溶液中的腐蚀失重曲线

Salt solution	$A$ / (g·m^-2)	$n$	$R 2$
3.5%NaCl	7.664	0.961	0.991
0.01 mol/L NaHSO₃	3.926	0.856	0.995

表1 G390NH在3.5%NaCl和0.01 mol/L NaHSO3溶液中的腐蚀动力学拟合结果

图3 G390NH在3.5%NaCl和0.01 mol/L NaHSO3溶液中经过不同周期周浸后的腐蚀速率及其比值

图4 G390NH在2种环境中的电化学极化曲线

表2 G390NH在3.5%NaCl和0.01 mol/L NaHSO3溶液中的极化曲线拟合结果

图5 G390NH在3.5%NaCl和0.01 mol/L NaHSO3溶液中极化曲线拟合自腐蚀电位(Ecorr)和自腐蚀电流(Icorr)的变化趋势

图6 G390NH在不同环境周浸实验后的腐蚀宏观形貌

图7 G390NH在不同环境周浸实验后的腐蚀微观形貌

图8 G390NH腐蚀360 h锈层截面形貌及EDS面扫分析

图9 3.5%NaCl环境中不同周期腐蚀产物XRD谱

图10 0.01 mol/L NaHSO3环境中不同周期腐蚀产物XRD谱

表3 3.5%NaCl环境中不同周期腐蚀产物半定量分析结果

表4 0.01 mol/L NaHSO3环境中不同周期腐蚀产物半定量分析结果

图11 G390NH各类腐蚀产物占比及α-FeOOH含量与γ-FeOOH含量之比(α / γ)

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