高强耐候钢Q550NHGF耐腐蚀性能研究

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DOI编码 ：10.26915/j.issn1003-0514.2025.03.009

中图分类号：TG142.1 文献标识码：B 文章编号：1003-0514（2025）03-0029-06

Study on the corrosion resistance of high-strength weathering steel Q55oNHGF

Wang Chuangwei1，Zhou Feng²，Li Zhengrong1，Guo Taixiongl，Zhao Zhengzhi²

（1.State Key Laboratoryof Vanadiumand Titanium Resources Comprehensive Utilization，Pangang Group Research

Institute Co.，Ltd.，Panzhihua 617ooo，Sichuan，China；2.Collaborative Innovation Centerof Steel Technology， University of Science and Technology Beijing，Beijing 1Ooo83，China）

Abstract：This study focuses on high-strength weathering steel Q550NHGF.Through cyclic immersion corosion tests and characterizationmethods suchas SEM，EPMA，XRD，andTEM （HRTEM），thecorrosionresistance of highstrength weatherng steel Q550NHGFwas systematicall investigated.The results indicate that the high-strength weathering steel Q550NHGF exhibits excellent corrosion resistance，with a corrosion rate of only 2.044 g/（m2⋅h） after 72 hours of corrosion. The main corrosion products are α -FeOOH， γ -FeOOH，and Fe304 .As the corrosion time increases，the proportion of α -FeOOHrises.After144hoursoforosion，theustlayerprotectionindex excds1indicating thattheustlayerprovides protection tothesubstrate.ThesynergisticenrichmentofCr，CuandPelements intherustlayer，aswellasthegeneration ofamorphousδ-FeOOH and Cr-doped FeCr2O4 and α -（Fe，Cr）OOH inthe inner rustlayer，significantly enhance the corrosion resistance of Q550NHGF.

Key words：Q55oNHGF; cyclic immersion corrosion; corrosion rate; rust layer; Corrosion resistance

在全球“双碳”战略推动下，光伏支架作为支撑组件的关键结构，其材料需兼具轻量化、高耐蚀性和经济性[1，2]。（剩余8158字）