Q500qENH耐候桥梁钢锈层的稳定化处理及形成过程
Stabilization Treatment and Formation of Rust Layer ofQ500qENH Weathering Bridge Steel
摘 要
采用涂锈层稳定剂与水处理(84 d)相结合的技术对Q500qENH耐候桥梁钢试样进行锈层稳定化处理,研究了试样表面锈层的微观形貌、物相组成和形成机理。结果表明:涂锈层稳定剂的耐候桥梁钢试样在水处理初期其表面腐蚀均匀,后期形成的锈层致密性较好且内部无明显裂纹;经过84 d水处理后,涂锈层稳定剂和未涂锈层稳定剂的试样表面锈层主要均由α-FeOOH、γ-FeOOH和少量Fe3O4组成,α-FeOOH与γ-FeOOH的质量比分别为2.77和1.85,涂锈层稳定剂试样表面优先形成稳定锈层;锈层稳定剂可使耐候桥梁钢快速形成一层均匀的锈层,并加快锈层初始相γ-FeOOH的生成和转化,提高锈层稳定相α-FeOOH的含量,促进稳定锈层生成,缩短锈层稳定化周期。
锈层稳定化
工业大气环境
锈层物相组成
weathering bridge steel
stabilization of rust layer
industrial atmospheric environment
phase composition of rust layer
Abstract
The rust layer stabilization treatment was carried out on Q500qENH weathering bridge steel samples by combination of coating rust layer stabilizer and water treatment (84 d). The micromorphology, phase composition and formation mechanism of the surface rust layer of the sample were studied. The results show that the surface corrosion of the weathering bridge steel sample with rust layer stabilizer was uniform in the early stage of water treatment, and the rust layer formed in the later stage had good compactness and no obvious cracks inside. After water treatment for 84 d, the rust layers on the surface of the samples with and without rust layer stabilizer were both mainly composed of α-FeOOH, γ-FeOOH and a small amount of Fe3O4, and the mass ratios of α-FeOOH to γ-FeOOH were 2.77 and 1.85, respectively; the surface of the sample with rust layer stabilizer preferentially formed a stable rust layer. The rust layer stabilizer could make the weathering bridge steel quickly form a uniform rust layer, accelerate the formation and transformation of the initial phase γ-FeOOH in the rust layer, increase the content of the stable phase α-FeOOH in the rust layer, promote the formation of the stable rust layer, and shorten the stabilization period of the rust layer.
中图分类号 TG172.3 DOI 10.11973/jxgccl202211006
所属栏目 试验研究
基金项目
收稿日期 2022/6/1
修改稿日期 2022/10/17
网络出版日期
作者单位点击查看
备注程丙贵(1986-),男,江苏苏州人,研究员,硕士
引用该论文: CHENG Binggui,HAN Limei,LI Li,QU Jinbo. Stabilization Treatment and Formation of Rust Layer ofQ500qENH Weathering Bridge Steel[J]. Materials for mechancial engineering, 2022, 46(11): 38～42
程丙贵,韩丽梅,李丽,曲锦波. Q500qENH耐候桥梁钢锈层的稳定化处理及形成过程[J]. 机械工程材料, 2022, 46(11): 38～42
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【5】刘涛,王胜民,侯云波,等.耐候钢表面锈层稳定化研究现状[J].表面技术,2018,47(10):240-248. LIU T,WANG S M,HOU Y B,et al.Research status on surface rust layer stabilization of weathering steel[J].Surface Technology,2018,47(10):240-248.
【6】陈文娟,郝龙,董俊华,等.模拟工业-海岸大气中SO2对Q235B钢腐蚀行为的影响[J].金属学报,2014,50(7):802-810. CHEN W J,HAO L,DONG J H,et al.Effect of SO2 on corrosion evolution of Q235B steel in simulated coastal industrial atmosphere[J].Acta Metallurgica Sinica,2014,50(7):802-810.
【7】谭何灵,周成,刘希辉,等.Cr对Q420钢在高盐度大气环境下耐蚀性的影响[J].中国腐蚀与防护学报,2017,37(3):267-272. TAN H L,ZHOU C,LIU X H,et al.Effect of Cr on corrosion resistance of Q420 steel in atmosphere with high salinity[J].Journal of Chinese Society for Corrosion and Protection,2017,37(3):267-272.
【8】ZHANG Q C,WU J S,WANG J J,et al.Corrosion behavior of weathering steel in marine atmosphere[J].Materials Chemistry and Physics,2003,77(2):603-608.
【9】CHENG X Q,TIAN Y W,LI X G,et al.Corrosion behavior of nickel-containing weathering steel in simulated marine atmospheric environment[J].Materials and Corrosion,2014,65(10):1033-1037.
【10】DIAZ I,CANO H,DE LA FUENTE D,et al.Atmospheric corrosion of Ni-advanced weathering steels in marine atmospheres of moderate salinity[J].Corrosion Science,2013,76:348-360.
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