摘要
对7个不同地点的Q500qENH钢进行为期8周的锈层稳定化水处理试验,确定Q500qENH钢最佳的锈层稳定化水处理工艺的适用性。结果表明:随锈层稳定化处理周期的延长,试样的失重和腐蚀减薄量均增加,腐蚀速率呈现下降趋势,试样表面锈层颜色从橘黄色向棕色转变,锈层厚度逐渐增加;电化学分析结果表明,随着处理周期延长,试样的自腐蚀电流密度下降和自腐蚀电位正移;X射线衍射(XRD)分析结果表明,随着处理周期的延长非稳定相物质(γ-FeOOH)逐渐向稳定相物质(α-FeOOH)转化,稳定相(α-FeOOH)所占比例逐渐增大。基于以上结果,Q500qENH耐候钢在3种典型地点采用不同的锈层稳定化水处理工艺,可经4~6周处理后形成较稳定的锈层。
The water treatment experiment for rust layer stabilization for Q500 qENH weathering steel was carried out in seven different locations for 8 weeks to determine the applicability of the optimal treatment process. Results showed that with the prolonging of the stabilization treatment period, the weight loss and corrosion thinning of the samples increased, the corrosion rate presented a downward trend, and the color of the rust layer on the surface of the samples changed from orange to brown. In addition, the thickness of the rust layer increased gradually. The electrochemical analysis results indicated that the self-corrosion current density of the samples decreased, and the self-corrosion potential gradually shifted positively with the prolonging of the stabilization treatment period. Meanwhile, the results of XRD analysis revealed that the unstable phase(γ-FeOOH) gradually transformed into stable phase(α-FeOOH), and the proportion of stable phase(α-FeOOH) gradually increased with the extension of stabilization treatment period. To sum up the above results, Q500 qENH weathering steel was treated by different rust layer stabilization water treatment processes in 3 kinds of typical locations, and a relatively stable rust layer could be obtained after 4~6 weeks.
作者
于强
王舒蕊
范益
蔡佳兴
王青峰
YU Qiang;WANG Shu-rui;FAN Yi;CAI Jia-xing;WANG Qing-feng(State Key Laboratory of Metastable Materials Preparation Technology and Science,Yanshan University,Qinhuangdao 066004,China;Jiangsu Key Laboratory of High-end Iron and Steel Materials,Nanjing Iron&Steel Co.,Ltd.,Nanjing 210000,China)
出处
《材料保护》
CAS
CSCD
2022年第5期41-47,共7页
Materials Protection
基金
国家重点研发项目(2017YFB0304802)资助。
关键词
锈层稳定化
耐候钢
耐蚀性能
水处理工艺
rust layer stabilization
weathering steel
corrosion resistance
water treatment process
