新型Cu-Mo耐候钢在模拟海洋大气环境中的腐蚀行为

doi:10.11902/1005.4537.2022.170

中国腐蚀与防护学报

2023, Vol. 43

Issue (3): 507-515 CSTR: 32134.14.1005.4537.2022.170 DOI: 10.11902/1005.4537.2022.170

研究报告

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新型Cu-Mo耐候钢在模拟海洋大气环境中的腐蚀行为

汪涵敏, 黄峰(

), 袁玮, 张佳伟, 王昕煜, 刘静

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

Corrosion Behavior of a Novel Cu-Mo Weathering Steel in an Artificial Marine Atmosphere

WANG Hanmin, HUANG Feng(

), YUAN Wei, ZHANG Jiawei, WANG Xinyu, LIU Jing

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

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摘要:

通过干、湿交替周期浸润实验、场发射扫描电子显微镜 (FE-SEM)、场发射电子探针 (FE-EPMA)、X射线衍射 (XRD)、Raman光谱以及电化学测试等技术，研究了新型Cu-Mo试验钢在模拟海洋大气中的长期腐蚀行为。结果表明，新型Cu-Mo试验钢的腐蚀过程可分为加速和减速两个阶段。腐蚀前期，以多边形铁素体和少量片层状珠光体为主的新型Cu-Mo试验钢的耐蚀性劣于以贝氏体-铁素体为主的含Cr耐候钢；长期腐蚀后期，新型Cu-Mo试验钢中Cu、Mo的富集和α-FeOOH的增加增强了锈层的防护性，使新型Cu-Mo试验钢的腐蚀速率大大降低，耐候性反而优于含Cr耐候钢。

关键词 ：新型Cu-Mo试验钢, 海洋大气, 耐蚀性能

Abstract：

The long-term corrosion behavior of a novel Cu-Mo test steel in an artificial marine atmosphere was studied by means of dry-wet alternate periodic immersion test, field emission scanning electron microscopy (FE-SEM), field emission electron probe (FE-EPMA), X-ray diffractometer (XRD), Raman spectroscopy (Raman) and electrochemical test. The results show that the Cu-Mo test steel presents a microstructure composed mainly of polygonal ferrite and a small amount of lamellar pearlite, while the counterpart Cr-containing weathering steel presents a microstructure composed mainly of bainite and ferrite. The corrosion process of the Cu-Mo test steel can be divided into two stages: acceleration and deceleration. In the early stage of corrosion, the corrosion resistance of the Cu-Mo test steel is inferior to that of the ordinary Cr-containing weathering steel. At the later stage of corrosion, the enrichment of Cu and Mo occurred in the Cu-Mo test steel, thereby resulted in the increase of α-FeOOH, which enhanced the protectiveness of the rust layer, therefore the corrosion rate of the Cu-Mo test steel decreased. In a word, the new Cu-Mo test steel presents better weathering resistance rather than that of the ordinary Cr-containing weathering steel.

Key words： Cu-Mo test steel marine atmosphere corrosion resistance

收稿日期: 2022-05-29 32134.14.1005.4537.2022.170

ZTFLH:

TG172

基金资助:湖北省自然科学基金科技创新群体(2021CFA023)

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: 汪涵敏，女，1997年生，硕士生

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引用本文:

汪涵敏, 黄峰, 袁玮, 张佳伟, 王昕煜, 刘静. 新型Cu-Mo耐候钢在模拟海洋大气环境中的腐蚀行为[J]. 中国腐蚀与防护学报, 2023, 43(3): 507-515.
WANG Hanmin, HUANG Feng, YUAN Wei, ZHANG Jiawei, WANG Xinyu, LIU Jing. Corrosion Behavior of a Novel Cu-Mo Weathering Steel in an Artificial Marine Atmosphere. Journal of Chinese Society for Corrosion and protection, 2023, 43(3): 507-515.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.170 或 https://www.jcscp.org/CN/Y2023/V43/I3/507

表1 3种钢的化学成分

图1 3种钢的显微组织照片

图2 3种钢试样平均腐蚀速率随时间变化曲线

图3 腐蚀768 h后3种钢试样锈层表面微观形貌

图4 腐蚀768 h后3种钢试样锈层截面形貌及元素分布图

图5 腐蚀768 h后3种钢试样锈层的XRD谱及半定量分析

图6 腐蚀768 h后3种钢试样锈层截面物相分布图

图7 腐蚀768 h后3种钢试样的电化学阻抗谱

图8 腐蚀768 h后3种钢试样EIS拟合结果

图9 3种钢试样腐蚀深度-时间双对数曲线

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