4032铝合金活塞在中高温氨水环境中的腐蚀行为研究

崔伟, 王中华, 周安游, 王涛, 郑淞生, 王兆林

doi:10.16577/j.issn.1001-1560.2024.0156

材料保护 >

2024 , Vol. 57 >Issue 7: 102 - 108

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0156

研究篇

4032铝合金活塞在中高温氨水环境中的腐蚀行为研究

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(厦门大学能源学院, 福建厦门 361102)

郑淞生(1978－),博士,副教授,能源材料与能源装备,E-mail: songsheng＠xmu.edu.cn

收稿日期: 2023-06-10

修回日期: 2023-09-14

录用日期: 2023-09-25

网络出版日期: 2024-08-16

基金资助

国家自然科学基金面上项目(21875199)；双一流建设重点高校项目(0290-X2100502)

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Study on Corrosion Behavior of 4032 Aluminum Alloy Piston in High Temperature Ammonia Environment

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(College of Energy, Xiamen University, Xiamen 361102, China)

ZHENG Songsheng (1978－),Ph.D.,Associate Professor,Research Focus:Energy Materials and Energy Apparatus, E-mail: songsheng＠xmu.edu.cn

Received date: 2023-06-10

Revised date: 2023-09-14

Accepted date: 2023-09-25

Online published: 2024-08-16

Supported by

National Natural Science Foundation General Project (21875199)； Double First Class Construction Key University Project(0290-X2100502)

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摘要

近年来，氨(NH3)作为内燃机燃料得到广泛关注。氨燃烧会产生大量的水，然而未完全燃烧的氨在有水存在的中高温环境中对发动机活塞部件可能会产生腐蚀。以4032 铝合金活塞材料为研究对象，研究其在恒温200 ℃下25%(质量分数)氨水溶液中的腐蚀行为，着重探讨了在不同时间尺度下铝合金的腐蚀失重、腐蚀产物形态、腐蚀电化学性质。结果表明，4032 铝合金在中高温氨水环境中的腐蚀速率随浸泡时间的延长呈先增强后减弱的变化趋势，腐蚀产物主要以Al(OH)3为主。随着浸泡时间的延长，4032 铝合金的腐蚀电位Ecorr和极化电阻Rp均逐渐增大，腐蚀电流密度Jcorr逐渐减小，并进一步解析了其腐蚀机理。

关键词： 氨燃料发动机; 4032 铝合金; 中高温氨水环境; 电化学腐蚀; 腐蚀行为

本文引用格式

崔伟, 王中华, 周安游, 王涛, 郑淞生, 王兆林 . 4032铝合金活塞在中高温氨水环境中的腐蚀行为研究[J]. 材料保护, 2024 , 57(7) : 102 -108 . DOI: 10.16577/j.issn.1001-1560.2024.0156

Abstract

In recent years, ammonia (NH3) has received widespread attention as a fuel for internal combustion engines.Ammonia combustion produces a large amount of water, but incomplete combustion of ammonia may cause corrosion to engine piston components in medium to high temperature environments with water present.In this work, taking 4032 aluminum alloy piston material as the research object, the corrosion behavior in a 25%(mass fraction) ammonia solution was analyzed at a constant temperature of 200 ℃, and the corrosion weight loss, corrosion product morphology and corrosion electrochemical properties of aluminum alloys were explored emphatically at different time scales.Results showed that the corrosion rate of 4032 aluminum alloy in medium to high temperature ammonia environment exhibited a trend of first increasing and then decreasing with the prolongation of soaking time, and the corrosion products were mainly Al(OH)3.With the extension of soaking time, the corrosion potential Ecorr and polarization resistance Rp of 4032 aluminum alloy increased gradually, while the corrosion current density Jcorr decreased gradually, which further analyzed the corrosion mechanism.

Key words： ammonia fuel engine; 4032 aluminum alloy; medium and high temperature ammonia environment; electrochemical corrosion; corrosion behavior

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