区域性气候条件下低合金高强耐候钢的初期腐蚀行为研究  

Investigation on Initial-stage Corrosion Behavior of Lowalloy High-strength Weathering Resistant Steel in Regional Climates

作　　者：潘雪新[1] 姜海昌[1] 付鸿[1] 黄耀[2] 韩军科[2] 曾令会 张德龙[4] 

机构地区：[1]中国科学院金属研究所,沈阳110016 [2]中国电力科学研究院,北京100055 [3]成都地铁运营有限公司,成都610000 [4]北京铁路局保定工务器材厂,保定071051

出　　处：《腐蚀科学与防护技术》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~~

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.

关 键 词：耐候钢 大气腐蚀 腐蚀速率 区域性气候 输电铁塔 

分 类 号：TG174[金属学及工艺—金属表面处理]