耐候桥梁钢在模拟工业大气环境中的腐蚀行为研究

王玉博, 翟晓亮, 梁智涛, 林田子

doi:10.16577/j.issn.1001-1560.2022.0343

材料保护 >

2022 , Vol. 55 >Issue 12: 84 - 90

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0343

试验研究

耐候桥梁钢在模拟工业大气环境中的腐蚀行为研究

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¹海洋装备用金属材料及其应用国家重点实验室； ²中交第一公路勘察设计研究院有限公司

王玉博(1992-)，硕士，助理工程师，主要从事金属材料研究，电话:0412-6728774， E-mail:1804500570＠qq.com

收稿日期: 2022-06-22

修回日期: 2022-07-27

录用日期: 2022-08-19

网络出版日期: 2023-12-27

基金资助

交通运输行业重点科技项目(2019-MS2-046)；中交第一公路勘察设计研究院有限公司科技研发基金项目(KCJJ2019-09)资助

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Study on Corrosion Behavior of Weathering Bridge Steel in Simulated Industrial Atmosphere

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(1. State Key Laboratory of Metal Material for Marine Equipment and Application， Anshan 114009， China；2. CCCC First Highway Consultants Co.， Ltd.， Xi’an 710065， China)

Received date: 2022-06-22

Revised date: 2022-07-27

Accepted date: 2022-08-19

Online published: 2023-12-27

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摘要

通过模拟工业大气环境对典型耐候桥梁钢腐蚀行为的影响，为耐候桥梁钢在不同污染程度的工业大气环境下的适用性提供科学依据。采用Q345qNH 和Q420qNH 2 种牌号的耐候桥梁钢，通过周期浸润加速腐蚀试验研究2 种耐候桥梁钢在工业大气环境中的腐蚀行为，利用失重法、电化学分析以及宏观形貌观察分析了模拟工业大气环境中2 种耐候桥梁钢在不同浓度NaHSO3 溶液中的适用性。结果表明:在模拟工业大气环境中，Q420qNH耐候钢的耐腐蚀性能优于Q345qNH，2 种耐候桥梁钢的腐蚀速率随着腐蚀时间延长呈先增大后减小趋势，24 h 时腐蚀速率最大。随着NaHSO3溶液浓度增加，腐蚀速率增大，当溶液浓度达到0.500%时，Q345qNH 试样的腐蚀是不断加速的，表明此时Q345qNH 的适用性受到一定限制。

关键词： 耐候桥梁钢; 模拟工业大气环境; 污染物浓度

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王玉博, 翟晓亮, 梁智涛, 林田子 . 耐候桥梁钢在模拟工业大气环境中的腐蚀行为研究[J]. 材料保护, 2022 , 55(12) : 84 -90 . DOI: 10.16577/j.issn.1001-1560.2022.0343

Abstract

For providing a scientific basis for the applicability of weathering bridge steels in industrial atmospheric environments with different levels of pollution， the influence of industrial atmospheric environments on the corrosion behaviors of typical weathering bridge steels was simulated. The corrosion behaviors in industrial atmospheric environments of two kinds of weathering bridge steels， Q345qNH and Q420qNH， were studied through the periodic infiltration accelerated corrosion test. Furthermore， the applicability of these two kinds of weathering bridge steels in NaHSO3 solutions with different concentrations in simulated industrial atmospheric environments was investigated by weight loss method，electrochemical analysis and macroscopic morphology observation. Results showed that the corrosion resistance of Q420qNH weathering steel was better than Q345qNH in simulated industrial atmospheric environments. The corrosion rate of these two weathering bridge steels increased first and then decreased with the extension of the corrosion time，and the corrosion rate was the highest at 24 h. As the concentration of NaHSO3 solution increased，the corrosion rate increased. When the solution concentration reached 0.5%，the corrosion of the Q345qNH sample was continuously accelerated， indicating that the applicability of Q345qNH was limited in this case.

Key words： weathering bridge steel; simulated industrial atmospheric environment; pollutant concentration

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