模拟工业海洋大气环境下Q345qDNH钢锈蚀行为研究

李怀峰; 贾鑫; 王宏博; 葛汉彬; 张建东

doi:10.13206/j.gjgs23051701

模拟工业海洋大气环境下Q345qDNH钢锈蚀行为研究

doi: 10.13206/j.gjgs23051701

1. 山东省交通规划设计院集团有限公司, 济南 250031;
2. 南京工业大学, 南京 211816;
3. 名城大学, 日本名古屋 468-8502;
4. 长大桥梁安全长寿与健康运维全国重点实验室, 南京 210017

详细信息

作者简介:
李怀峰,男,1971年出生,研究员。

通讯作者:
张建东,zhangjd@njtech.edu.cn。

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出版历程
- 收稿日期: 2023-05-17
- 网络出版日期: 2023-12-25

Study on Corrosion Behavior of Q345qDNH Weathering Steel in Simulated Industrial Marine Atmosphere

1. Shandong Provincial Communications Planing and Design Institute Group Co., Ltd., Jinan 250031, China;
2. Nanjing Tech University, Nanjing 211816, China;
3. Meijo University, Nagoya 468-8502, Japan;
4. National Key Laboratory of Safety, Longevity and Health O&M of Bridges, Nanjing 210017, China

摘要

摘要: 以实际工程中的典型桥梁耐候钢为对象，通过周期浸润加速腐蚀试验，并使用宏观形貌观察、扫描电子显微镜（SEM）、X射线衍射分析（XRD）等方法，研究耐候钢锈层表面形貌、锈层物相组成、腐蚀失重及动力学曲线和电化学性质等的变化规律，探究了Q345qDNH典型耐候钢在模拟工业海洋大气环境NaHSO₃和不同NaCl浓度下的腐蚀行为。
结果表明，在不同NaCl浓度的腐蚀环境下，耐候钢表面腐蚀产物均由α-FeOOH、γ-FeOOH、β-FeOOH、Fe₂O₃、Fe₃O₄构成，且腐蚀环境中NaCl浓度的大小与耐候钢的腐蚀失重速率呈正相关；当NaCl浓度为0.1%时，耐候钢的腐蚀失重速率随腐蚀时间的延长迅速降至低位后趋于平稳，在腐蚀1 440 h后锈层表面均匀致密，平均腐蚀失重速率约为0.76 g/（cm²·h）；当腐蚀环境中NaCl离子浓度为3.5%时，耐候钢的腐蚀失重速率处于高位且随腐蚀时间的延长先增高后降低，在腐蚀1 440 h后锈层表面裂纹孔洞较多，平均腐蚀失重速率约为0.89 g/（cm²·h）。由此，NaCl浓度越低，耐候钢的自腐蚀电位越正，自腐蚀电流密度越小，腐蚀失重速率越慢。耐候钢在0.1%NaCl浓度的环境中腐蚀1 440 h后其自腐蚀电流密度为105.65μA/mm²，锈层中α-FeOOH与（β-FeOOH+γ-FeOOH）含量的比值接近2，远大于3.5%NaCl浓度时的该比值（0.104），此时锈层状态趋于稳定，并对耐候钢基体具有较好保护作用。
- 桥梁耐候钢 /
- 工业海洋大气环境 /
- 氯离子浓度 /
- 腐蚀行为
Abstract: For the typical bridge weathering steel in practical engineering as the object, the change laws of the surface morphology, phase composition, corrosion weight loss, dynamic curve and electrochemical properties of the rust layer of weathering steel were studied through periodic immersion accelerated corrosion test, and the macro morphology observation method, scanning electron microscope(SEM), X-ray diffraction analysis(XRD) and other methods, The corrosion behavior of Q345qDNH typical weathering steel under simulated industrial marine atmospheric environment NaHSO₃ and different NaCl concentrations was investigated.
The results show that the corrosion products on the surface of weathering steel are mainly composed of α-FeOOH, γ-FeOOH, β-FeOOH, Fe₂O₃, Fe₃O₄, and the NaCl concentration in the corrosion environment is positively related to the corrosion weight loss rate of weathering steel. When the concentration of NaCl is 0.1%, the corrosion weight loss rate of weathering steel rapidly drops to the low position with the extension of corrosion time and then tends to be stable. After 1 440 h of corrosion, the surface of the rust layer is uniform and dense, and the average corrosion weight loss rate is about 0.76 g/(cm²·h); when the NaCl ion concentration in the corrosion environment is 3.5%, the corrosion weight loss rate of weathering steel is at a high level and increases first and then decreases with the extension of corrosion time. After 1 440 h of corrosion, there are many cracks and holes on the surface of the rust layer, and the average corrosion weight loss rate is about 0.89 g/(cm²·h). Therefore, the lower the NaCl concentration, the more positive the self corrosion potential of weathering steel, the smaller the self corrosion current density and the slower the corrosion weight loss rate. The self corrosion current density of weathering steel is 105.65 μA/mm² after being corroded for 1 440 h in the environment with 0.1%NaCl concentration, in the rust layer α-FeOOH/(β-FeOOH+γ-FeOOH) ratio is close to 2, much higher than 0.104 in 3.5%NaCl concentration. At this time, the state of rust layer tends to be stable, and it has a good protection effect on weathering steel matrix.
- bridge weathering steel /
- industrial-marine atmospheric corrosion environment /
- Chloride ion concentration /
- corrosion behavior

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参考文献(21)

[1]	付贵勤,李东亮,朱苗勇.SO₂对海洋大气环境中含铬耐候钢腐蚀行为的影响[J].钢铁,2018,53(12):94-99.
[2]	陈鸿海.金属腐蚀学[M].北京:北京理工大学出版社,1996.
[3]	郭明晓,潘晨,王振尧,等.碳钢在模拟海洋工业大气环境中初期腐蚀行为研究[J].金属学报,2018,54(1):65-75.
[4]	Ma Y,Li Y,Wang F.Corrosion of low carbon steel in atmospheric environments of different chloride content[J].Corrosion Science:The Journal on Environmental Degradation of Materials and its Control,2009,51(5):997-1006.
[5]	Wan Y,Tan J,Zhu S,et al.Insight into atmospheric pitting corrosion of carbon steel via a dual-beam FIB/SEM system associated with high-resolution TEM[J].Corrosion Science:The Journal on Environmental Degradation of Materials and its Control,2019,152:226-233.
[6]	周鲁军,杨善武.海洋工程用钢的大气腐蚀与耐候钢的发展[J].中国冶金,2022,32(8):7-24.
[7]	刘雨薇.镀锌钢在含Cl^-酸雨大气环境中的腐蚀行为研究[D].北京:中国科学院大学,2015.
[8]	陈文娟,郝龙,董俊华,等.模拟工业-海岸大气中pH值对Q235B钢腐蚀行为的影响[J].金属学报,2015,51(2):191-200.
[9]	梁彩凤,侯文泰.环境因素对钢的大气腐蚀的影响[J].中国腐蚀与防护学报,1998,18(1):3-8.
[10]	林翠,李晓刚,刘晓东.碳钢和耐候钢在北京城市大气环境中初期腐蚀行为[J].中国腐蚀与防护学报,2005,25(4):193-199.
[11]	Burger E,Fénart M,Perrin S,et al.Use of the gold markers methods to predict the mechanisms of iron atmospheric corrosion[J].Corrosion Science:The Journal on Environmental Degradation of Materials and its Control,2011,53(6):2122-2130.
[12]	Monnier J,Burger E,Berger P,et al.Localisation of oxygen reduction sites in the case of iron long term atmospheric corrosion[J].Corrosion Science:The Journal on Environmental Degradation of Materials and its Control,2011,53(8):2468-2473.
[13]	张然.铁质文物腐蚀产物β-FeOOH中Cl的脱出和物相转化[J].腐蚀与防护,2022,43(7):1-9 ,51.
[14]	李巧霞,王振尧,韩薇,等.碳钢和耐候钢的大气腐蚀[J].中国腐蚀与防护学报,2009,29(5):394-400.
[15]	Yamashita M,Miyuki H,Matsuda Y,et al.The long term growth of the protective rust layer formed on weathering steel by atmospheric corrosion during a quarter of a century[J].ChemInform,1994,36(2):283-299.
[16]	Hara S,Miura M,Uchiumi Y,et al.Suppression of deicing salt corrosion of weathering steel bridges by washing[J].Corrosion Science:The Journal on Environmental Degradation of Materials and its Control,2005,47(10):2419-2430.
[17]	郭铁明,张延文,秦俊山,等.桥梁钢Q345q在3种模拟大气环境中的腐蚀行为研究[J].中国腐蚀与防护学报,2019,39(4):319-330.
[18]	Díaz I,Cano H,Fuente D D L,et al.Atmospheric corrosion of Ni-advanced weathering steels in marine atmospheres of moderate salinity[J].Corrosion Science:The Journal on Environmental Degradation of Materials and its Control,2013,76:348-360.
[19]	Cheng Q,Tao B,Song L,et al.Corrosion behaviour of Q235B car-bon steel in sediment water from crude oil[J].Corrosion Science:The Journal on Environmental Degradation of Materials and its Control,2016,111:61-71.
[20]	杨颖,侯华兴,张哲.Q500qENH耐候桥梁钢在模拟工业大气环境中的腐蚀行为[J].腐蚀与防护,2017,37(4):256-261.
[21]	张全成,王建军,吴建生,等.锈层离子选择性对耐候钢抗海洋性大气腐蚀性能的影响[J].金属学报,2001,37(2):193-196.