摘要
分别选择温带季风兼海洋性气候、温带大陆性季风气候兼工业轻微污染环境、亚热带季风性湿润气候、亚热带海洋性季风气候4种典型环境进行G-355NH低合金高强耐候钢的大气暴露实验,开展不同区域性气候特征下耐候钢的大气腐蚀规律研究,深入分析不同的气候条件对曝露初期耐候钢腐蚀规律的影响。结果表明,不同区域的G-355NH耐候钢腐蚀速率差异较大,温度和湿度是影响腐蚀速率的最大因素,同时雾霾也是影响腐蚀速率的重要因素,加剧了腐蚀速率。在亚热带海洋性季风气候条件下一个月内已经形成相对完整、致密的腐蚀层。不同环境腐蚀产物相似,但各产物的相对含量差异较大。相关的研究结果将对G-355NH高强耐候钢在不同区域输电铁塔上的应用提供一定的指导。
The weathering tests were conducted in four test sides at different climate zones i.e. warm temperate monsoon climate zone, warm temperate continental monsoon climate zone with slight industrial pollution, sub-tropical humid monsoon climate zone and sub-tropical oceanic monsoon climate zone aiming to investigate the initial-stage corrosion behavior of low-alloy high-strength weathering resistant steel G-355 NH in different atmospheres. The results show that the corrosion rate of weathering resistant steel is obviously influenced by the varied environment-aspects, especially temperature and humidity,while fog and haze can also enhance the corrosion rate. The corrosion product-scales became relatively complete and compact after exposure in the test side at sub-tropical oceanic monsoon climate zone for 1 month. The corrosion products formed in different environments were all composited of α-Fe OOH, γ-Fe OOH, Fe_3O_4 and Fe, but the relative content of each component was significantly different. The above results will be a useful reference for the application of G-355 NH steel as structural material of transmission tower in different regions.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2017年第4期356-362,共7页
Corrosion Science and Protection Technology
基金
国家重点研发计划项目(2016YFB1200501)
锡盟-胜利特高压交流输变电工程~~
关键词
耐候钢
大气腐蚀
腐蚀速率
区域性气候
输电铁塔
weathering resistant steel
atmospheric corrosion
corrosion rate
regional climate
transmission steel tower
