耐候钢热轧氧化皮对快速稳定化锈层演变规律及耐蚀性影响

doi:10.11902/1005.4537.2023.288

中国腐蚀与防护学报

2024, Vol. 44

Issue (4): 891-900 CSTR: 32134.14.1005.4537.2023.288 DOI: 10.11902/1005.4537.2023.288

研究报告

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耐候钢热轧氧化皮对快速稳定化锈层演变规律及耐蚀性影响

张佳伟¹, 黄峰¹(

), 汪涵敏¹, 郎丰军², 袁玮¹, 刘静¹

1.武汉科技大学省部共建耐火材料与冶金国家重点实验室湖北省海洋工程材料及服役安全工程技术研究中心武汉 430081
2.宝钢股份中央研究院武钢有限技术中心武汉 430080

Effect of Rolling Scale on Evolution of Fast-stabilized Rust Layer and Corrosion Resistance of a Weathering Steel

ZHANG Jiawei¹, HUANG Feng¹(

), WANG Hanmin¹, LANG Fengjun², YUAN Wei¹, LIU Jing¹

1. Hubei Engineering Technology Research Center of Marine Materials and Service Safety, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2. R&D Center of Wuhan Iron & Steel Co., Ltd., Baosteel Central Research Institute, Wuhan 430080, China

引用本文:

张佳伟, 黄峰, 汪涵敏, 郎丰军, 袁玮, 刘静. 耐候钢热轧氧化皮对快速稳定化锈层演变规律及耐蚀性影响[J]. 中国腐蚀与防护学报, 2024, 44(4): 891-900.
Jiawei ZHANG, Feng HUANG, Hanmin WANG, Fengjun LANG, Wei YUAN, Jing LIU. Effect of Rolling Scale on Evolution of Fast-stabilized Rust Layer and Corrosion Resistance of a Weathering Steel[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(4): 891-900.

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摘要:

利用大气暴晒试验，辅以场发射扫描电镜(FE-SEM)、场发射电子探针扫描分析仪(FE-EPMA)、显微拉曼光谱(Raman)以及电化学测试，研究了热轧氧化皮对经快速稳定化处理Q345qDNH耐候钢锈层演变规律及其耐工业大气腐蚀性能影响机理。结果表明，氧化皮(Fe₃O₄ + Fe₂O₃ + 少量FeO及FeCr₂O₄相)存在改善了锈层表面的致密性，但未改变Q345qDNH耐候钢腐蚀产物类型，有无氧化皮的Q345qDNH耐候钢试样腐蚀产物均主要由γ-FeOOH、α-FeOOH和Fe₃O₄组成，两种试样快速稳定化锈层均呈现出α-FeOOH由外向内生长的现象，带热轧氧化皮试样因氧化皮中Fe₃O₄存在可促进α-FeOOH生成而表现出更好的锈层稳定化效果和耐蚀性。

关键词 ： Q345qDNH耐候钢, 氧化皮, 工业大气腐蚀, 稳定化处理

Abstract：

The effect of mill scale on the evolution of the fast-stabilized rust layer and anti-corrosion performance of Q345qDNH weathering steel in industrial atmospheric environment was studied via real atmospheric exposure testing, field emission scanning electron microscope (FE-SEM), field emission electron probe (FE-EPMA), micro-Raman Spectrum and electrochemical technique. The results showed that the presence of Fe₃O₄, Fe₂O₃, a small amount of FeO and FeCr₂O₄ in the oxide scales could improve the compactness of the rust layer, but could not change the types of corrosion products of Q345qDNH weathering steel. The corrosion products of the bare steel and the steel with mill scale were mainly composed of γ-FeOOH, α-FeOOH and Fe₃O₄. In the three types of corrosion products, the propagation of α-FeOOH is an inward growing process. The steels with mill scales present better rust layer stabilization and corrosion resistance due to the existence of Fe₃O₄ in the mill scale could promote the formation of α-FeOOH.

Key words： Q345qDNH weathering steel oxidized scale industrial atmospheric corrosion stabilization treatment

收稿日期: 2023-09-10 32134.14.1005.4537.2023.288

ZTFLH:

TG174.4

基金资助:国家自然科学联合基金重点项目(U21A20113)

通讯作者: 黄峰，E-mail：huangfeng@wust.edu.cn，研究方向为高性能钢铁材料及服役安全

Corresponding author: HUANG Feng, E-mail: huangfeng@wust.edu.cn

作者简介: 张佳伟，男，1996年生，硕士生

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图1 Q345qDNH耐候钢金相显微组织形貌

图2 Q345qDNH带氧化皮试样表面和截面形貌

图3 Q345qDNH带氧化皮试样EBSD结果

图4 经不同表面处理及不同时间暴晒后的Q345qDNH裸钢试样锈层微观形貌

图5 经不同表面处理和不同时间暴晒的Q345qDNH带氧化皮试样锈层微观形貌

图6 经不同表面处理和不同时间暴晒后的Q345qDNH裸钢试样锈层截面形貌及元素分布

图7 经不同表面处理和不同时间暴晒的Q345qDNH带氧化皮试样锈层截面形貌及元素分布

图8 经不同表面处理和不同时间暴晒后的Q345qDNH裸钢试样沿锈层深度Raman光谱图

图9 经不同表面处理和不同时间暴晒后的Q345qDNH带氧化皮试样沿锈层深度Raman光谱图

图10 Q345qDNH裸钢及带氧化皮试样经不同条件处理后在0.01mol/L NaHSO3溶液中的线性极化曲线

图11 各种试样线性极化电阻Rp的拟合值

图12 模拟工业大气环境中Q345qDNH裸钢和带氧化皮试样快速稳定化锈层形成示意图

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