Corrosion Behavior and Mechanical Properties of 30CrMnSiA High-Strength Steel under an Indoor Accelerated Harsh Marine Atmospheric Environment

Li, Ning; Zhang, Weifang; Xu, Hai; Cai, Yikun; Yan, Xiangqiao

doi:10.3390/ma15020629

Cited by 12 publications

(1 citation statement)

References 57 publications

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“…Due to the concealment of FHSB joint diseases and the complexity of removing the joint, the analysis of corroded joint components is mainly based on indoor test. Using the XRD, the SEM, electrochemical technology and alternate dry and wet corrosion test, many scholars have studied the corrosion behavior and rust formation mechanism of steel plate in different atmospheric corrosive environments [9][10]. Air pollutants, PH value and wet time have great influence on the formation of steel surface protective layer [11][12].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Corrosion Products of Friction-type High-Strength Bolted Joints of Steel Bridge: A Case Study

Xu¹,

Xu²,

Xu³

et al. 2023

Preprint

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This paper analyzed the main diseases of the friction high-strength bolt (FHSB) joints in order to study the characteristics of the corrosion products of the joints in steel bridge and the influence factors. Seven representative FHSB connection pairs and eight steel plate samples were selected from the Dongying Shengli Yellow River Bridge, which has been in operation for 33 years. Then Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS) and X-Ray Diffraction (XRD) were used to analyze the microscopic morphology and chemical composition of the corroded surface of the samples. Finally, this paper discussed the relationship between the corroded sample surface and the environmental corrosion. The research results showed that construction quality problems, such as non-standard hole expansion, segmental slab joint dislocation and contact surface pollution, accelerated corrosion of the contact surface. With the increase of corrosion degree of joints, the contact surface of aluminum spraying layer gradually changed from a rugged and dense state to a smooth and porous powder state. With the corrosion of the steel plate substrate, the contact surface gradually changed from a fluffy stratified state to a surface bonding state. It was inferred that the friction coefficient of the FHSB connection node on the corroded aluminum sprayed contact surface first decreased and then increased. The corroded node samples detected not only a large number of S and Cl elements, but also the oxides of Mn, Si and other elements as well as FeS. It was speculated that node corrosion was also related to atmospheric (acid rain) and industrial dust and other corrosive environments. Almost all samples detected the component SiO2 of the Yellow River soil, as well as Mg, Ca, K, Na and other elements at the same time, which is basically consistent with the component elements of the Yellow River soil. Therefore, it was inferred that it was related to the inclusion of the Yellow River soil.

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Section: Introductionmentioning

confidence: 99%