保温层材质对供热管道Q235钢腐蚀行为的影响研究

陈飞, 胡亚博, 龚潇雨, 王力

doi:10.16577/j.issn.1001-1560.2024.0240

材料保护 >

2024 , Vol. 57 >Issue 10: 190 - 196

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0240

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保温层材质对供热管道Q235钢腐蚀行为的影响研究

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¹北京市热力集团有限责任公司； ²北京科技大学新材料技术研究院

陈飞(1982-)，博士，高级工程师，主要从事供热系统节能、新材料应用与开发研究，电话:17710158886，E-mail:caesar_ch＠163.com

收稿日期: 2023-12-29

修回日期: 2024-04-17

录用日期: 2024-04-18

网络出版日期: 2024-12-22

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Research on the Influence of Insulation Layer Materials on the Corrosion Behavior of Q235 Steel in Heating Pipelines

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(1.Beijing District Heating Group Co.， Ltd.， Beijing 100028， China；2.Institute for Advanced Materials and Technology， University of Science and Technology Beijing， Beijing 100083， China)

CHEN Fei(1982-)，Ph.D.， Senior Engineer， Research Focus: Energy Saving in Heating Systems， and Application and Development of New Materials， Tel.: 17710158886，E-mail:caesar_ch＠163.com

Received date: 2023-12-29

Revised date: 2024-04-17

Accepted date: 2024-04-18

Online published: 2024-12-22

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摘要

供热管道表面保温材料会显著影响水汽渗透和腐蚀性离子扩散，最终影响热力管道腐蚀。为此，针对4 种保温材料(聚氨酯、泡沫玻璃、2 种市售气凝胶)下Q235 钢热力管道的腐蚀行为规律展开研究。结果表明，泡沫玻璃表面的接触角约为43.8°，小于聚氨酯、气凝胶保温层(180°)，表面更容易被水浸润，周浸条件下泡沫玻璃包覆的Q235 钢的腐蚀速率最快，约为153.1 mg/(dm2·d)，明显高于聚氨酯包裹试样的124.3 mg/(dm2·d)，2 种气凝胶包裹下试样周浸试验后腐蚀速率最小，分别为96.73，109.43 mg/(dm2·d)。泡沫玻璃包覆下的表面腐蚀最严重，除锈后表面凹坑最多。 Q235 钢在4 种保温材料下的腐蚀产物主要为Fe3O4，并含有少量Fe(OH)(SO4)(H2O)5和FeCl2(OH)4。

关键词： 供热管道; 腐蚀; 保温层; Q235; 周浸试验

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陈飞, 胡亚博, 龚潇雨, 王力 . 保温层材质对供热管道Q235钢腐蚀行为的影响研究[J]. 材料保护, 2024 , 57(10) : 190 -196 . DOI: 10.16577/j.issn.1001-1560.2024.0240

Abstract

The surface insulation layers of heating pipelines have an important effect on water vapor penetration and corrosive ion diffusion，ultimately affecting the corrosion behavior of heating pipelines.In this study， the corrosion behavior of Q235 steel thermal pipelines insulated with different materials， including polyurethane and two types of commercially available aerogels made from foam glass， was investigated.Results showed that the wetting angle of foam glass was about 43.8°，which was less than that of the polyurethane and aerogel insulation layers (180°)，making the surface easier to soak in water.Under periodic immersion conditions， the corrosion rate of Q235 steel covered by foam glass was the fastest [about 153.1 mg/(dm2·d)]， significantly higher than that of the samples covered by polyurethane [124.3 mg/(dm2·d)].The corrosion rate of the samples covered by two kinds of aerogel was the lowest [96.73，109.43 mg/(dm2·d)] after the periodic immersion test.There were more pits observed after rust removal in the samples covered by foam glass， indicating the most serious corrosion.The main corrosion product was Fe3O4， which contained a small amount of Fe(OH)(SO4)(H2O)5 and FeCl2(OH)4.

Key words： heating pipeline; corrosion; insulation layer; Q235; periodic immersion experiment

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