C含量对低合金钢在模拟高湿热海洋大气环境中腐蚀行为的影响
Influences of Carbon Content on Corrosion Behavior of Low-Alloy Steels inSimulated Tropical Marine Atmosphere Environment
摘 要
在模拟高湿热海洋大气环境中对0.07C钢和0.09C钢进行周期浸润腐蚀试验；采用电化学测试，结合显微组织观察、腐蚀形貌观察以及腐蚀产物分析，研究了C含量对两种低合金钢腐蚀行为的影响。结果表明：与0.07C钢相比，0.09C钢中的珠光体含量较高且分布不均匀，这提高了材料的点蚀敏感性；C含量对于耐蚀性的影响主要体现在腐蚀中后期，在腐蚀4 d后0.07C钢的腐蚀速率相较于0.09C钢降低约15%，0.07C钢的自腐蚀电位较高，更容易生成具有保护性的钝化膜。
C含量
高湿热海洋大气环境
点蚀
low-alloy steel
carbon content
tropical marine atmospheric environment
pitting
Abstract
The cyclic immersion corrosion tests of 0. 07C steel and 0. 09C steel were carried out in simulated high humid and hot marine atmospheric environment. Combined with microstructure observation, corrosion morphology observation and corrosion product analysis, the effect of C content on the corrosion behavior of the two low alloy steels was studied by electrochemical test. The results showed that compared with 0. 07C steel, the content of pearlite in 0. 09C steel was higher and the distribution was not uniform, which raised the pitting sensitivity of the material. The effect of C content on corrosion resistance was mainly reflected in the middle and late stages of corrosion. After 4 days of corrosion, the corrosion rate of 0. 07C steel was about 15% lower than that of 0. 09C steel. The self-corrosion potential of 0. 07C steel was higher, and it was easier to form a protective passivation film.
中图分类号 TG174 DOI 10.11973/fsyfh-202312005
所属栏目 试验研究
基金项目
收稿日期 2022/9/20
修改稿日期
网络出版日期
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联系人作者周乃鹏(znp628@163.com)
引用该论文: ZHOU Naipeng,CHAI Feng,LUO Xiaobing,LI Jian. Influences of Carbon Content on Corrosion Behavior of Low-Alloy Steels inSimulated Tropical Marine Atmosphere Environment[J]. Corrosion & Protection, 2023, 44(12): 32
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