不同合金含量蠕墨铸铁耐蚀性研究

李娜娜; 冀露露; 石磊; 王忻怡; 张允继; 姜爱龙; 伍启华

doi:10.7643/ issn.1672-9242.2025.10.011

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装备环境工程 ›› 2025, Vol. 22 ›› Issue (10) : 86-92. DOI: 10.7643/ issn.1672-9242.2025.10.011

船舶及海洋工程装备

不同合金含量蠕墨铸铁耐蚀性研究

李娜娜, 冀露露^*, 石磊, 王忻怡, 张允继, 姜爱龙, 伍启华

作者信息 +

Corrosion Resistance of Creep Graphite Cast Iron with Different Alloy Contents

LI Nana, JI Lulu^*, SHI Lei, WANG Xinyi, ZHANG Yunji, JIANG Ailong, WU Qihua

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文章历史 +

摘要

目的对比不同合金含量蠕墨铸铁在不同介质中的耐蚀性。方法采用电化学测试方法,从微观的角度研究3种不同铜、锡含量的蠕墨铸铁在pH 9.0的发动机防冻液中的电化学腐蚀性能,并采用高温反应釜试验和中性盐雾试验从宏观的角度研究3种不同蠕墨铸铁的耐蚀性。结果在碱性防冻液介质下,随着铜和锡合金含量增加,蠕墨铸铁自腐蚀电流和腐蚀速率逐渐减小,材料的耐腐蚀性有较好的趋势,但在宏观高温反应釜中,3种材料的耐蚀性无明显区别。在中性盐雾介质下,3种不同合金含量蠕墨铸铁的耐蚀性及变化规律相差不大。结论微观上铜、锡含量高的蠕墨铸铁耐蚀相对较好,宏观上3种不同合金含量蠕墨铸铁的耐蚀性表现一致,在工程应用方面,材料的宏观耐蚀表现更具有实际意义。

Abstract

The work aims to compare the corrosion resistance of vermicular graphite cast iron with different alloy contents in different media. The electrochemical corrosion performance of three different types of vermicular graphite cast iron with different copper and tin contents in engine antifreeze at pH 9.0 was studied from a microscopic perspective according to the electrochemical testing methods. The corrosion resistance of the three types of vermicular graphite cast iron was studied from a macroscopic perspective by high-temperature reaction kettle tests and neutral salt spray tests. As a result, under alkaline antifreeze medium, with the increase of copper and tin alloy content, the self-corrosion current and corrosion rate of vermicular graphite cast iron gradually decreased, and the corrosion resistance of the material showed a good trend. However, in the macroscopic high-temperature reactor, there was no significant difference in the corrosion resistance of the three materials. The corrosion resistance and variation patterns of ductile iron with three alloy contents in the neutral salt spray medium were not significantly different. In conclusion, on a microscopic level, the corrosion resistance of vermicular graphite cast iron with high copper and tin content is relatively good. On a macroscopic level, the corrosion resistance of vermicular graphite cast iron with three alloy contents is consistent. In engineering applications, the macroscopic corrosion resistance performance of the material is more practically significant.

导出引用

李娜娜, 冀露露, 石磊, 王忻怡, 张允继, 姜爱龙, 伍启华. 不同合金含量蠕墨铸铁耐蚀性研究[J]. 装备环境工程. 2025, 22(10): 86-92 https://doi.org/10.7643/ issn.1672-9242.2025.10.011

LI Nana, JI Lulu, SHI Lei, WANG Xinyi, ZHANG Yunji, JIANG Ailong, WU Qihua. Corrosion Resistance of Creep Graphite Cast Iron with Different Alloy Contents[J]. Equipment Environmental Engineering. 2025, 22(10): 86-92 https://doi.org/10.7643/ issn.1672-9242.2025.10.011

中图分类号： TG174.4

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