Evaluation of Applicability for Ni-advanced Weathering Steels and Bridge High-performance Steels to Railway Steel Bridges

Sugimoto, Ichiro; Kita, Kenji

doi:10.2219/rtriqr.51.33

Cited by 21 publications

(8 citation statements)

References 3 publications

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“…This same opinion is expressed in the work of Sugimoto and Kita, [28] in which a similar WS (3.0 wt% Ni-0.4 wt% Cu) was exposed in Japan at Hokuriku Overbridge located about 60 m from the seashore, placed on the four surfaces on each beam of the trestle pier subjected to different Cl − deposition rates (18-103 mg Cl − /m 2 · d). The corrosion rate after 3 years of exposure on the surfaces least exposed to marine aerosol (18 mg Cl − /m 2 · d, very close to the deposition rate at station CV1) was similar to that obtained in the present work.…”

Section: Marine Atmospheric Corrosion Resistancesupporting

confidence: 52%

Effect of Cu, Cr and Ni alloying elements on mechanical properties and atmospheric corrosion resistance of weathering steels in marine atmospheres of different aggressivities

Cano¹,

Díaz²,

Fuente³

et al. 2017

Materials & Corrosion

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This paper studies the individual and combined effect of adding Cu (0.26-1.06 wt%), Cr (0.54 wt%) and Ni (0.92-2.92 wt%) alloying elements to carbon steel with regard to mechanical behaviour and atmospheric corrosion resistance in two marine atmospheres with different chloride deposition rates (20 and 71 mg ClMechanical properties are assessed in terms of yield strength, ultimate strength, elongation, hardness and weldability, while atmospheric corrosion resistance is evaluated by determination of corrosion losses, rust layer structure, and nature of the corrosion products formed. The best atmospheric corrosion resistance is obtained with weathering steel (3 wt% Ni), which would be suitable for use unpainted in marine atmospheres of moderate salinity (≤20 mg Cl − /m 2 · d), though a longer cooling time would be required during its manufacture in order to assure adequate weldability. K E Y W O R D Satmospheric corrosion, Cr, Cu, marine atmospheres, mechanical properties, Ni, weathering steels

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Section: Marine Atmospheric Corrosion Resistancesupporting

confidence: 52%

Effect of Cu, Cr and Ni alloying elements on mechanical properties and atmospheric corrosion resistance of weathering steels in marine atmospheres of different aggressivities

Cano¹,

Díaz²,

Fuente³

et al. 2017

Materials & Corrosion

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“…Since monoclinic akaganeite intrinsically contains Clion in its crystal structure[187], the formation of monoclinic akaganeite is expected to make the aggressively corrosive Clion inactive by fixing it in the rust layer. This may result in a higher corrosion resistance of the Fe-Ni alloy, and therefore of the advanced WS containing Ni, in a saline environment.A study of the magnetic properties of rust samples carried out by Mizoguchi et al[188] using a Superconducting Quantum Interference Device (SQUID) magnetometer and MS revealed two important factors for this advanced WS: (i) Ni 2+ ions in the inner rust layer had the electrochemical effect of repelling anions, especially Cl -, from the steel/rust interface, and (ii) the inner rust layer was composed of grains that can be densely packed because of their particular volume distribution.Sugimoto and Kita[189] carried out a 5-year field study in three areas of different salinities (18, 42 and 103 mg Cl -/m 2 day) with different WS compositions: conventional (Cu 0.30% wt -Cr 0.50% wt), Ni-advanced WS A (Ni 3.0% wt -Cu 0.4% wt) and Ni-advanced WS B (Ni 1.5% wt -…”

mentioning

confidence: 99%

Weathering steels: From empirical development to scientific design. A review

Morcillo¹,

Díaz²,

Chico³

et al. 2014

Corrosion Science

210

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The design of the first weathering steels was purely empirical and focused on a small number of conventional alloying elements such as manganese, silicon, chromium, nickel, copper and phosphorus, mainly. The environmental conditions that promote the formation of protective rust layers: existence of wet/dry cycling, absence of very long wetness times, atmospheres without a marine component, etc., were identified by trial and error. This paper makes a bibliographic review of the abundant literature that has been published on the atmospheric corrosion of weathering steels, setting out in chronological order the advances made in the scientific knowledge of important matters such as: atmospheric corrosion mechanisms of weathering steel, formation of protective rust layers, and the role played by alloying elements. The work ends with an overview of the scientific design of new weathering steels, placing special emphasis on the new compositions developed for application in marine atmospheres.

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“…The corrosion kinetics of steel in atmospheric environment is in accordance with the traditional equation [12] as follows:W=Ctn, where W is the corrosion weight loss rate, t is the corrosion time, and C and n are constants. The increase in the corrosion weight loss rate in the accelerated corrosion period (before 75 h) can be attributed to surface toughness and work hardening of the specimens, and the specimens’ rust layers did not seem to have a protective capability [13].…”

Section: Resultsmentioning

confidence: 99%

Corrosion Behavior of SMA490BW Steel and Welded Joints for High-Speed Trains in Atmospheric Environments

Zhang

et al. 2019

Materials

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Currently, high-speed trains work under various atmospheric environments, and the bogie as a key component suffers serious corrosion. To investigate the corrosion behavior of bogies in industrial atmospheric environments, the periodic immersion wet/dry cyclic corrosion test for SMA490BW steel and automatic metal active gas (MAG) welded joints used for bogies was conducted in the present work. Corrosion weight loss rate, structure, and composition of rust layers as well as electrochemistry parameters were investigated. The results showed that the corrosion weight loss rate decreased with increasing corrosion time; furthermore, the corrosion weight loss rate of the welded joints was lower than that of SMA490BW steel. The XRD results showed that the rust layers formed on SMA490BW steel and its welded joints were mainly composed of α-FeOOH, γ-FeOOH, Fe2O3, and Fe3O4. The observation of surface morphology indicated that the rust layers of the welded joints were much denser and had a much finer microstructure compared with those of SMA490BW steel. After corrosion for 150 h, the corrosion potential of the welded joints with rust layers was higher than that of SMA490BW steel. In short, the welded joints exhibited better corrosion resistance than SMA490BW steel because of the higher content of alloy elements, as shown in this work.

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Evaluation of Applicability for Ni-advanced Weathering Steels and Bridge High-performance Steels to Railway Steel Bridges

Cited by 21 publications

References 3 publications

Effect of Cu, Cr and Ni alloying elements on mechanical properties and atmospheric corrosion resistance of weathering steels in marine atmospheres of different aggressivities

Effect of Cu, Cr and Ni alloying elements on mechanical properties and atmospheric corrosion resistance of weathering steels in marine atmospheres of different aggressivities

Weathering steels: From empirical development to scientific design. A review

Corrosion Behavior of SMA490BW Steel and Welded Joints for High-Speed Trains in Atmospheric Environments

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