The long term growth of the protective rust layer formed on weathering steel by atmospheric corrosion during a quarter of a century

Yamashita, Masato; Harada, Miyuki; Matsuda, Yasushi; Nagano, Hiroo; Misawa, Toshihei

doi:10.1016/0010-938x(94)90158-9

Cited by 495 publications

(228 citation statements)

References 27 publications

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“…While there have been many analyses of rust on the steels in mild environments, [3][4][5][6][7][8][9][10] there are many problems that remain unclear regarding the basic mechanisms of the rust formation 11) and the effect of alloy elements [12][13][14] in saline environments. Therefore, in order to obtain the corrosion guidance for weathering steels that can be used in coastal environment, the thermodynamic stability of various rusts (Fe-X system) was investigated using a binary-phase potential-pH diagram.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Silicon-Bearing Steel in a Wet/Dry Environment Containing Chloride Ions

Nishimura

2007

Mater. Trans.

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The rust of Si-bearing steel was analyzed by EPMA, XRF, XPS and TEM, and the electrochemical behavior of the rusted steel was investigated by the electrochemical impedance spectroscopy (EIS) method after wet/dry cyclic corrosion test with chloride ions.The 2.0 mass% Si-bearing steel showed high corrosion resistance compared to carbon steel (SM) in the corrosion test. EPMA and XPS showed that Si existed as a intermediate oxidized state such as Si 2þ in the inner rust layer for Si-bearing steel. TEM showed that nano-scale complex oxides containing Si were formed in the inner rust of the Si-bearing steel.EIS measurement was taken to estimate the rust resistance (Rrust) and corrosion reaction one (Rt) of the rusted steel. It was found that Rrust and Rt of Si-bearing steel were much larger than those of SM after the rust formation. The corrosion of Si-bearing steel could be suppressed by the formation of the nano-scale complex oxide containing Si in inner rust layer to prevent the penetration of Cl ions.

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Section: Introductionmentioning

confidence: 99%

Corrosion Behavior of Silicon-Bearing Steel in a Wet/Dry Environment Containing Chloride Ions

Nishimura

2007

Mater. Trans.

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“…At the initial wet/dry cycles, Fe(OH) 2 and Fe(OH) 3 were first formed and then these initial corrosion products were transformed mainly to polymorphs of FeOOH. This transformation process can be understood by considering initial dissolution of Fe 2þ ion from the Fe-based alloys and subsequent oxidation and dehydration.…”

Section: Discussionmentioning

confidence: 99%

“…2. During this wet and dry cycling, the rust constituents detected especially during the quite initial wet/dry cycles were Fe(OH) 2 and Fe(OH) 3 independent of alloying elements and of ion species in the electrolyte film. An example of the X-ray diffraction spectra during the first several wet and dry cycling is shown in Fig.…”

Section: Initial Form Of Rust Detectedmentioning

confidence: 92%

Atmospheric Rust Formation Process on Fe–Cr and Fe–Ni Alloys under Wet/Dry Cycles Observed by Synchrotron Radiation X-ray Diffraction

et al. 2005

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In situ observation of initial process of rust formation on Fe-5 mass%Cr and Fe-9 mass%Ni alloys using SPring-8 synchrotron radiation was carried out under wet/dry cycling with 3.5% Na 2 SO 4 and NaCl solution films. It was shown that the rust constituents detected during the quite initial wet/dry cycles were Fe(OH) 2 and Fe(OH) 3 independent of alloying elements. Most characteristic X-ray diffraction peaks obtained under the Na 2 SO 4 solution film are indexed as those from goethite, -FeOOH, both in the Fe-Cr and Fe-Ni alloys. In the case of the Fe-Cr alloy, coexistence of Cr 3þ ion in the Na 2 SO 4 film weakened the -FeOOH diffraction peaks probably due to formation of ultrafine goethite crystals. Akaganéite, -FeOOH, appears only under the NaCl solution film. Especially, the Fe-Ni alloy forms a considerable amount of akaganéite, which can be interpreted in terms of formation of the monoclinic akaganéite.

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“…M-41 [10], used in the construction of Indian Railway Coaches, falls in the category of weathering steels [13,21] and it is similar to commercially available steels such as SAILCOR grade steel produced by Bokaro Steel Plant,SAIL, India and patented CORTEN steel USA [6]. They contain small amounts of alloying elements such as Chromium, Nickel, Copper and Phosphorus for mitigating atmospheric corrosion and solid-solution strengthening.…”

Section: Literature Surveymentioning

confidence: 99%

The Role of Shielding Gas on Mechanical, Metallurgical and Corrosion Properties of Corten Steel Welded Joints of Railway Coaches Using Gmaw

John¹,

Sathiya²,

Mathew³

2016

Adv. Sci. Technol. Res. J.

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This analysis lays emphasis on finding a suitable combination of shielding gas for welding underframe members such as sole bar of Railway Coaches made of corten steel; for improved mechanical, metallurgical and corrosion properties of welds using copper coated solid MIG/MAG welding filler wire size 1.2 mm conforming to AWS/SFA 5.18 ER 70 S in Semi-automatic GMAW process. Solid filler wire is preferred by welders due to less fumes, practically no slag and easy manipulation of welding torch with smooth wire flow during corrosion repair attention, when compared to Flux cored wire. Three joints using Gas metal arc welding (GMAW) with shielding gases viz., Pure CO 2, (80% Ar -20% CO 2 ) and (90% Ar -10% CO 2 ) were made from test pieces cut from Sole bar material of Railway Coach. Study of Mechanical properties such as tensile strength, hardness and toughness revealed that welded joint made using shielding gas (80% Ar -20% CO 2 ) has better Mechanical properties compared to the other two shielding gases and comparable to that of Parent metal. Type of Shielding gas used has influence on the chemical composition and macro & micro structures. The Tafel extrapolation study of freshly ground samples in 3.5% NaCl solution revealed that the welded joint made using shielding gas (80% Ar -20% CO 2 ) has also better corrosion resistance which is comparable to the Parent metal as well as similar commercial steels.

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The long term growth of the protective rust layer formed on weathering steel by atmospheric corrosion during a quarter of a century

Cited by 495 publications

References 27 publications

Corrosion Behavior of Silicon-Bearing Steel in a Wet/Dry Environment Containing Chloride Ions

Corrosion Behavior of Silicon-Bearing Steel in a Wet/Dry Environment Containing Chloride Ions

Atmospheric Rust Formation Process on Fe–Cr and Fe–Ni Alloys under Wet/Dry Cycles Observed by Synchrotron Radiation X-ray Diffraction

The Role of Shielding Gas on Mechanical, Metallurgical and Corrosion Properties of Corten Steel Welded Joints of Railway Coaches Using Gmaw

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The long term growth of the protective rust layer formed on weathering steel by atmospheric corrosion during a quarter of a century

Cited by 495 publications

References 27 publications

Corrosion Behavior of Silicon-Bearing Steel in a Wet/Dry Environment Containing Chloride Ions

Corrosion Behavior of Silicon-Bearing Steel in a Wet/Dry Environment Containing Chloride Ions

Atmospheric Rust Formation Process on Fe&ndash;Cr and Fe&ndash;Ni Alloys under Wet/Dry Cycles Observed by Synchrotron Radiation X-ray Diffraction

The Role of Shielding Gas on Mechanical, Metallurgical and Corrosion Properties of Corten Steel Welded Joints of Railway Coaches Using Gmaw

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Atmospheric Rust Formation Process on Fe–Cr and Fe–Ni Alloys under Wet/Dry Cycles Observed by Synchrotron Radiation X-ray Diffraction