工程科学学报，第38卷，第12期：1762-1769,2016年12月 Chinese Journal of Engineering,Vol.38,No.12:1762-1769,December 2016 D0l:10.13374/j.issn2095-9389.2016.12.015:http://journals.ustb.edu.cn 光照对Q450NQR1耐候钢在干湿交替下腐蚀行为的 影响 黄涛四，陈小平，王向东，刘芮，李向阳 钢铁研究总院，北京100081 ☒通信作者，E-mail:jxgahuangtao(@126.com 摘要采用腐蚀质量损失、扫描电子显微镜、X射线衍射仪、线性极化等测试手段，研究无光照、半光照及全光照三种实验 条件对Q450NQR1耐候钢在干湿交替条件下腐蚀行为的影响规律.结果表明：光照对实验钢干湿交替腐蚀过程影响显著.实 验钢在腐蚀前期(48)腐蚀速率大小依次为半光照、无光照和全光照，腐蚀中后期(72~96)腐蚀速率由大到小依次为半光 照、全光照和无光照。腐蚀宏观形貌有明显差别，无光照时试样腐蚀产物呈淤泥状分布整个表面，有光照条件时腐蚀产物则 呈颗粒状分布，但全光照条件时腐蚀产物颗粒更细且孔隙更小.另外，三种条件下腐蚀产物物相组成一致，但含量有所不同. 线性极化测试得出96极化电阻由大到小依次为无光照、全光照和半光照，这一结果与通过腐蚀失重得出的腐蚀速率结果一致. 关键词耐候钢：钢腐蚀：光照：大气腐蚀 分类号TG172.3 Effect of light on the corrosion behavior of Q450NQRI weathering steel inthe wet-dry cycle condition HUANG Tao,CHEN Xiao-ping,WANG Xiang-dong,LIU Rui,LI Xiang-yang Central Iron and Steel Research Institute,Beijing 100081,China Corresponding author,E-mail:jxgahuangtao@126.com ABSTRACT The effects of no light,half-day light and all-day light on the corrosion behavior of Q450NQRI weathering steel in the wet-dry cycle condition were examined by corrosion mass loss,scanning electron microscopy,X-ray diffraction and linear polarization tests.The results indicate that light significantly affects the corrosion process in the wet-dry cycles.In the early stage of steel corrosion (before 48 h),the corrosion rate from fast to slow is followed by half-day light,no light,and all-day light:but in the later period (72- 96h),the corrosion rate is ordered by half-day light,all-day light,and no light.The corrosion morphologies are obviously different. The corrosion products are silt-shape distribution in no light condition and particulate distribution in light condition,while they are par- ticle-distributed with finer particles and smaller pores in all-day light condition.Xray diffraction results show that the corrosion prod- ucts are the same,but the contents are different in the three conditions.By linear polarization tests,the polarization resistance is ob- tained in the order from fast to slow of no light,half-day light,and all-day light at 96h,which is well consistent with the order of cor- rosion mass loss rate. KEY WORDS weathering steel:steel corrosion:light:atmospheric corrosion 耐候钢在大气环境中的腐蚀电化学反应过程涉及薄的电解薄液膜影响腐蚀过程.耐候钢的大气腐蚀性 气、液、固三相及其相界面，通过在其表面形成一层很 影响因素有温度、相对湿度、盐粒、污染性气体、光照 收稿日期：2016-06-17 基金项目：国家重点基础研究发展计划资助项目(2014CB643300)工程科学学报，第 38 卷，第 12 期: 1762--1769，2016 年 12 月 Chinese Journal of Engineering，Vol． 38，No． 12: 1762--1769，December 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 12． 015; http: / /journals． ustb． edu． cn 光照对 Q450NQＲ1 耐候钢在干湿交替下腐蚀行为的 影响 黄 涛，陈小平，王向东，刘 芮，李向阳 钢铁研究总院，北京 100081  通信作者，E-mail: jxgahuangtao@ 126． com 摘 要 采用腐蚀质量损失、扫描电子显微镜、X 射线衍射仪、线性极化等测试手段，研究无光照、半光照及全光照三种实验 条件对 Q450NQＲ1 耐候钢在干湿交替条件下腐蚀行为的影响规律． 结果表明: 光照对实验钢干湿交替腐蚀过程影响显著． 实 验钢在腐蚀前期( 48 h) 腐蚀速率大小依次为半光照、无光照和全光照，腐蚀中后期( 72 ～ 96 h) 腐蚀速率由大到小依次为半光 照、全光照和无光照． 腐蚀宏观形貌有明显差别，无光照时试样腐蚀产物呈淤泥状分布整个表面，有光照条件时腐蚀产物则 呈颗粒状分布，但全光照条件时腐蚀产物颗粒更细且孔隙更小． 另外，三种条件下腐蚀产物物相组成一致，但含量有所不同． 线性极化测试得出96 h 极化电阻由大到小依次为无光照、全光照和半光照，这一结果与通过腐蚀失重得出的腐蚀速率结果一致． 关键词 耐候钢; 钢腐蚀; 光照; 大气腐蚀 分类号 TG172. 3 Effect of light on the corrosion behavior of Q450NQＲ1 weathering steel inthe wet--dry cycle condition HUANG Tao ，CHEN Xiao-ping，WANG Xiang-dong，LIU Ｒui，LI Xiang-yang Central Iron and Steel Ｒesearch Institute，Beijing 100081，China  Corresponding author，E-mail: jxgahuangtao@ 126． com ABSTＲACT The effects of no light，half-day light and all-day light on the corrosion behavior of Q450NQＲ1 weathering steel in the wet--dry cycle condition were examined by corrosion mass loss，scanning electron microscopy，X-ray diffraction and linear polarization tests． The results indicate that light significantly affects the corrosion process in the wet--dry cycles． In the early stage of steel corrosion ( before 48 h) ，the corrosion rate from fast to slow is followed by half-day light，no light，and all-day light; but in the later period ( 72-- 96 h) ，the corrosion rate is ordered by half-day light，all-day light，and no light． The corrosion morphologies are obviously different． The corrosion products are silt-shape distribution in no light condition and particulate distribution in light condition，while they are par￾ticle-distributed with finer particles and smaller pores in all-day light condition． X-ray diffraction results show that the corrosion prod￾ucts are the same，but the contents are different in the three conditions． By linear polarization tests，the polarization resistance is ob￾tained in the order from fast to slow of no light，half-day light，and all-day light at 96 h，which is well consistent with the order of cor￾rosion mass loss rate． KEY WOＲDS weathering steel; steel corrosion; light; atmospheric corrosion 收稿日期: 2016--06--17 基金项目: 国家重点基础研究发展计划资助项目( 2014CB643300) 耐候钢在大气环境中的腐蚀电化学反应过程涉及 气、液、固三相及其相界面，通过在其表面形成一层很 薄的电解薄液膜影响腐蚀过程． 耐候钢的大气腐蚀性 影响因素有温度、相对湿度、盐粒、污染性气体、光照