Journal ArticleDOI
Corrosion Resistance of High Performance Weathering Steel for Bridge Building Applications
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In this paper, the mechanical properties, corrosion resistance and microstructures of high performance steel (HPS) were investigated by tensile testing machine, Charpy V-Notch (CVN) testing machines, cyclic immersion corrosion tester, XRD, optical microscopy (OM), scanning electron microscopy, and electron probe micro-analyzer (EPMA).Abstract:
The mechanical properties, corrosion resistance and microstructures of high performance steel (HPS) was investigated by tensile testing machine, Charpy V-Notch (CVN) testing machine, cyclic immersion corrosion tester, XRD, optical microscopy (OM), scanning electron microscopy (SEM), and electron probe micro-analyzer (EPMA). The results showed that significant differences existed in the tensile strength, yield strength and impact toughness between HPS and PCS. After 72 h cyclic immersion accelerated corrosion test, the inner rust layer on HPS was composed of α-FeOOH phase and denser than that on PCS that was a mixture of α-FeOOH and Fe3O4. The rust formed on HPS provides better protection and HPS has lower corrosion rates than PCS. Copper and chromium in HPS enrich in the rust layer and enhance the compactness of the rust layer. Based on the results of the accelerated corrosion tests and rust layer analysis, the roles of Cu and Cr against corrosion are discussed, providing HPS with chemical specification which has been industrially successful to produce weathering steel for bridge structure.read more
Citations
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Journal Article
The Mechanism of Atmospheric Rusting and the Effect of Cu and P on the Rust Formation of Low Alloy Steels
TL;DR: In this article, the effect of catalytic effect of Cu and P on the oxidation of Fe(II) hydroxo-complexes in aqueous solutions has been investigated and the mechanism of atmospheric rusting deduced from the results obtained in the present investigation has been used to explain the difference in behaviour between ordinary mild steels and low alloy steels during atmospheric exposure.
Journal ArticleDOI
Comparative assessment of mechanical properties of HPS between electrochemical corrosion and spray corrosion
TL;DR: In this paper, an experimental study was conducted to compare the deterioration of mechanical properties of HPS specimens subjected to electrochemical corrosion and neutral salt spray accelerated corrosion by using 3D scanning technology.
Journal ArticleDOI
In-situ characterization of initial marine corrosion induced by rare-earth elements modified inclusions in Zr-Ti deoxidized low-alloy steels
TL;DR: In this article, the effects of rare-earth elements modified inclusions on initial marine corrosion of Zr-Ti deoxidized low-alloy steels were studied by first principle modeling and a variety of analytical methods including in-situ scanning vibrating electrode technique (SVET), scanning electron microscopy with x-ray microanalysis (SEM/EDS), and confocal Raman microscopy (CRM).
Journal ArticleDOI
Initiation and propagation of localized corrosion induced by (Zr, Ti, Al)-O x inclusions in low-alloy steels in marine environment
TL;DR: In this article, the effects of inclusions on localized corrosion of Zr-Ti deoxidized low-alloy steels in marine environment were investigated by various analytical techniques including scanning electron microscopy with X-ray microanalysis (SEM/EDS), confocal Raman microscopy (CRM), and in situ scanning vibrating electrode technique (SVET).
Journal ArticleDOI
Research on corrosion and fatigue performance of weathering steel and High-Performance steel for bridges
TL;DR: In this paper, Xu et al. conducted an experimental test to investigate the corrosion and fatigue performances of the base metal of Q345CNH, a typical type of WS used in China, and HPS 70 W, an typical steel used in the U.S. The experimental results indicated that the corrosion effect causes a reduction in the fatigue strength of both the WS and the HPS.
References
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Journal ArticleDOI
The long term growth of the protective rust layer formed on weathering steel by atmospheric corrosion during a quarter of a century
TL;DR: In this paper, the inner stable and protective rust layer which covered the surface of weathering steel mainly consists of nano-particles of α-FeOOH containing a considerable amount of Cr.
Journal ArticleDOI
The mechanism of atmospheric rusting and the protective amorphous rust on low alloy steel
TL;DR: In this article, a large amount of amorphous matter in rust formed in semi-rural atmosphere was identified by infra red and far infra-red spectra as amorphus ferric oxyhydroxide, FeO x (OH) 8-2x.
Journal ArticleDOI
Composition and protective ability of rust layer formed on weathering steel exposed to various environments
TL;DR: The compositional change of rust (corrosion products) layer formed on weathering steel exposed to atmosphere with different amount of air-borne sea salt particles in Japan have been investigated by the X-ray diffraction method as mentioned in this paper.
Journal ArticleDOI
On the atmospheric corrosion of metals which are covered with thin electrolyte layers. II, Experimental results
Martin Stratmann,Heinz Streckel +1 more
TL;DR: In this paper, the corrosion properties of pure iron and the alloys Fe-0.5Cu and Fe-3.4Cu are investigated during several wet/dry transitions, and the corrosion potential is measured with a Kelvin probe without touching the surface under investigation.
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