Corrosion Behavior of Q345q Steel with Oxide Scale in Simulated Typical Atmospheric Environment in Northwest China

doi:10.11901/1005.3093.2019.088

	Corrosion Behavior of Q345q Steel with Oxide Scale in Simulated Typical Atmospheric Environment in Northwest China
	Zhang, Yanwen 1,2; Guo, Tieming 1,2; Song, Zhitao 1,2; Nan, Xueli 1,2; Xu, Xiujie 1,2; Dong, Zhilin 1,2
刊名	Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research
	2019-10-25
卷号	33 期号:10 页码:749-762
关键词	Atmospheric corrosion Atmospheric structure Corrosion protection Corrosion rate Corrosive effects Electrodes Hematite Hot rolled steel Hot rolling Magnetite Pitting Scale (deposits) Scales (weighing instruments) Scanning electron microscopy Snow and ice removal Sodium compounds Steel testing Deicing salts Metallic material Mixed solution NorthWest China Oxide scale Sodium bisulfite
ISSN号	10053093
DOI	10.11901/1005.3093.2019.088
英文摘要	The structure of the oxide scale on the as received hot-rolled bridge steel Q345q and the corrosion behavior of the steel Q345q with oxide scale in three simulated atmospheric environments in Northwest China were studied by XRD, scanning electron microscopy, electrochemical technique and wet-dry alternating corrosion test. The results show that the hot-rolled oxide scale composes mainly of Fe3O4 and Fe2O3, which is porous with cracks and other defects. After the dry-wet alternating accelerated corrosion test of the steel Q345q with oxide scale, although the corrosion weight loss is the highest in NaHSO3 solution, the free-corrosion potential increases with the corrosion time, and the free-corrosion current density decreases in the later stage of corrosion. As far as the morphology of the rust layer and the ratio of γ/α* are concerned, the rust layer formed on the steel presents good stability; However, in deicing salt solution, the corrosion rate is the smallest, but the steel suffered mainly from Cl--dominated pitting corrosion with the corrosion characteristics of "large cathode and small anode". Its corrosion products contain such as β-FeOOH and HFeCl4(H2O)6, which results in loose rust layer with poor protectiveness and increased free-corrosive current density; In deicing salt+NaHSO3 solution, both pitting corrosion and general corrosion occur. Due to the synergistic effect of Cl- and HSO3-, the autocatalytic effect of a part of Cl- is reduced, but most α-FeOOH is converted from β-FeOOH, which resulted in the poor protective rust layer. © All right reserved.
语种	中文
出版者	Chinese Journal of Materials Research
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/113868]
专题	材料科学与工程学院
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhang, Yanwen,Guo, Tieming,Song, Zhitao,et al. Corrosion Behavior of Q345q Steel with Oxide Scale in Simulated Typical Atmospheric Environment in Northwest China[J]. Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research,2019,33(10):749-762.
APA	Zhang, Yanwen,Guo, Tieming,Song, Zhitao,Nan, Xueli,Xu, Xiujie,&Dong, Zhilin.(2019).Corrosion Behavior of Q345q Steel with Oxide Scale in Simulated Typical Atmospheric Environment in Northwest China.Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research,33(10),749-762.
MLA	Zhang, Yanwen,et al."Corrosion Behavior of Q345q Steel with Oxide Scale in Simulated Typical Atmospheric Environment in Northwest China".Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research 33.10(2019):749-762.