耐候钢表面稳定化处理及锈层结构研究

doi:10.11902/1005.4537.2021.280

中国腐蚀与防护学报

2022, Vol. 42

Issue (5): 856-860 DOI: 10.11902/1005.4537.2021.280

海洋材料腐蚀与防护专栏

本期目录 | 过刊浏览

耐候钢表面稳定化处理及锈层结构研究

石践(

), 胡学文, 何博, 杨峥, 汪飞, 郭锐

马鞍山钢铁股份有限公司技术中心马鞍山 243000

Surface Stabilization and Rust Structure of Weathering Steel

SHI Jian(

), HU Xuewen, HE Bo, YANG Zheng, WANG Fei, GUO Rui

Technology Center of Masteel, Ma'anshan Iron and Steel Co. Ltd., Ma'anshan 243000, China

全文: PDF(10521 KB) HTML

摘要:

针对免涂装耐候钢使用过程中暴露出的锈液流挂问题,设计了一种耐候钢锈层稳定化处理液,并对稳定化处理后的耐候钢进行了半年的大气暴晒实验。分析了耐候钢稳定锈层形成过程中,锈层的结构及演化行为。腐蚀动力学曲线结果表明：耐候钢表面锈层经过4个阶段逐渐达到稳定状态,每个阶段的增 (失) 重均呈线性变化。锈层中Cu、Cr富集提高了锈层电化学保护性能,缩短了稳定化进程。

关键词 ：锈层稳定化, 耐候钢, 富集

Abstract：

Aiming at the problem of emerging traces of fluid flow containing rust products on the surface of the bare weathering steel during real service in atmosphere, a stabilizing treatment solution for the weathering steel was designed, and after stabilization treatment, the weathering steel was exposed in a real atmosphere for 0.5 a. The evolution process of the forming rust layer on the weathering steel was monitored and characterized. The corrosion kinetic curve shows that the weight variation of weathering steel gradually reaches a stable state through four stages, and the mass gain (loss) of each stage changes linearly. The enrichment of Cu and Cr in the rust increases the electrochemical protectiveness of the rust layer, reduces the corrosion rate and shortens the stabilization process of the bare weathering steel.

Key words： surface rust stabilizer weathering steel enrichment

收稿日期: 2021-10-11

ZTFLH:

TG172

通讯作者: 石践 E-mail: stoneshi810@163.com

Corresponding author: SHI Jian E-mail: stoneshi810@163.com

作者简介: 石践,男,1991年生,硕士,工程师

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引用本文:

石践, 胡学文, 何博, 杨峥, 汪飞, 郭锐. 耐候钢表面稳定化处理及锈层结构研究[J]. 中国腐蚀与防护学报, 2022, 42(5): 856-860.
Jian SHI, Xuewen HU, Bo HE, Zheng YANG, Fei WANG, Rui GUO. Surface Stabilization and Rust Structure of Weathering Steel. Journal of Chinese Society for Corrosion and protection, 2022, 42(5): 856-860.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2021.280 或 https://www.jcscp.org/CN/Y2022/V42/I5/856

图1 耐候钢腐蚀增重、增重速率动力学曲线及耐候钢腐蚀失重率

表1 耐候钢腐蚀增重动力学曲线拟合结果

图2 耐候钢暴晒不同时间的腐蚀形貌

图3 试样表面腐蚀形貌的SEM图像

图4 耐候钢的动电位极化曲线

表2 极化曲线拟合结果

图5 耐候钢暴晒不同时间截面腐蚀SEM图像

图6 耐候钢截面锈层元素分布 (180 d)

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