Protective Rust Layer Formed on Weathering Steel by Atmospheric Corrosion for a Quarter of a Century

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

doi:10.2355/tetsutohagane1955.79.1_69

Cited by 59 publications

(29 citation statements)

References 18 publications

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“…2(a), (b), and (c), respectively. Since it is known that the shape of pure -FeOOH particles is spindle-like and that of the Fe 3 O 4 particles is spherical, 15) these results are consistent with the X-ray diffraction results shown in Fig. 1 The shape of the -FeOOH particles obtained from the GR2(SO 4 2À ) with 5.0 mol% nickel appears to be more needle-like and shorter than that of the particles obtained from the GR2(SO 4 2À ) with 2.5 mol% nickel ions.…”

Section: Characterizations Of Particlesmentioning

confidence: 99%

“…The differences in the species and morphologies of the components of the iron corrosion products are considered to be attributed to the environmental reaction conditions and the incorporation of foreign cations and anions. 15,16) Therefore, the influences of the reaction conditions on the formation of the iron oxyhydroxides and oxides from the GR in an aqueous solution are required to be clarified. We have investigated the formation conditions of the iron oxyhydroxides and oxides obtained from GR2(SO 4 2À ) by aerial oxidation.…”

Section: Introductionmentioning

confidence: 99%

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Characteristic Behavior of Nickel Ions during Transformation of Green Rust to Ferric Oxyhydroxides in Aqueous Solution

et al. 2008

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X-ray diffraction, transmission electron microscopy, and X-ray absorption spectroscopy were used for characterizing the role of nickel in the transformation of Green Rrust 2(SO 4 2À ) (GR2). GR2(SO 4 2À ) was synthesized from the solution of ferric and ferrous sulfate and that of sodium hydroxide. The suspension containing GR2(SO 4 2À ) with and without nickel was oxidized by passing oxygen gas into the aqueous solution, in which GR2(SO 4 2À ) was transformed into ferric oxyhydroxides. The pH and oxidation reduction potential (ORP) values of the aqueous solution were monitored during the transformation of GR2(SO 4 2À ). In addition, the concentrations of iron and nickel in the solution during the transformation of GR2(SO 4 2À ) were analyzed by using inductively coupled plasma atomic emission spectroscopy. The reaction conditions of the GR2(SO 4 2À ) suspension were found to be strongly influenced by the addition of nickel. The reaction product goethite, which was transformed from GR2(SO 4 2À ), also appeared to be stabilized by the addition of nickel. These results indicate that the species of the solid particles formed in the solution are controlled by the addition of foreign elements.

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Section: Characterizations Of Particlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characteristic Behavior of Nickel Ions during Transformation of Green Rust to Ferric Oxyhydroxides in Aqueous Solution

et al. 2008

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“…[3][4][5][6] Therefore, formation conditions of iron oxides, including ferric oxyhydroxides and hydroxides, will be compared with the present experimental results, although the results are concerned with corrosion products formed in one cycle of wetting and drying processes. It should be mentioning that corrosion conditions in this work are not always identical to the case for the protective rust layer formed cycled wetting and drying processes.…”

Section: Corrosion Products Formed Iron and Iron-nickelmentioning

confidence: 99%

“…Typically, a protective rust layer is formed on the surface of weathering steel, and the layer is known to considerably reduce the corrosion rate of weathering steel. [3][4][5][6][7][8] The mechanism of atmospheric corrosion has been discussed on the basis of electrochemical reactions, and electrochemical methods and other techniques were utilized for studying reaction processes in atmospheric corrosion. [9][10][11][12][13] It was considered in these works that the anodic metal dissolution reaction is balanced by the cathodic reaction during corrosion, and the reduction and re-oxidation of corrosion products of ferric and ferrous ions can occur in water.…”

Section: Introductionmentioning

confidence: 99%

<I>In-situ</I> X-ray Diffraction of Corrosion Products Formed on Iron Surfaces

et al. 2005

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In-situ X-ray diffraction measurements by synchrotron radiation and conventional X-ray source have been carried out for identifying constituent species of corrosion products, which were formed on the surface of a pure iron and an iron-5 mass% nickel alloy by reaction with aqueous solutions containing sodium chloride or sodium sulfate. A cell has been prepared for in-situ diffraction measurements of the corrosion products. Diffraction patterns from the corrosion products showed that major constituent species of the corrosion products was -FeOOH, and the fraction of minor species of -FeOOH and Fe 3 O 4 in the corrosion products depended on corrosion conditions, such as wetting and drying processes, anion species in aqueous solutions and nickel in the sample. An oxide scale thermally formed on the iron surface was also found to affect the formation of corrosion products.

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“…2,3) The corrosion rate of steel is influenced by the properties of corrosion products formed on the steel surface, as seen a protective rust layer on weathering steel. [4][5][6] Thus, the structure and properties of corrosion products are of great importance.…”

Section: Introductionmentioning

confidence: 99%

Atomic-Scale Structure and Morphology of Ferric Oxyhydroxides Formed by Corrosion of an Iron–Silicon Alloy

et al. 2006

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Quantitative X-ray structural analysis using an in-house X-ray diffraction apparatus has been used for characterizing the atomic-scale structure of the -FeOOH (lepidocrocite) particles prepared by dipping a pure iron and an iron-silicon alloy into aqueous solutions containing sodium chloride. The morphology of the -FeOOH particles was observed by transmission electron microscopy (TEM), and their bonding structure were analyzed using Fourier transform infrared spectroscopy (FT-IR). The realistic atomic-scale structures in the -FeOOH particles were estimated by fitting the interference functions with the help of the reverse Monte Carlo (RMC) simulation technique. The results showed that the linkages of fundamental FeO 6 octahedral units in the particles were deviated from the ideal crystal structure. The structural deviation is considered to be due to the incorporation of foreign ions during the formation of these particles in the aqueous solutions.

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Protective Rust Layer Formed on Weathering Steel by Atmospheric Corrosion for a Quarter of a Century

Cited by 59 publications

References 18 publications

Characteristic Behavior of Nickel Ions during Transformation of Green Rust to Ferric Oxyhydroxides in Aqueous Solution

Characteristic Behavior of Nickel Ions during Transformation of Green Rust to Ferric Oxyhydroxides in Aqueous Solution

<I>In-situ</I> X-ray Diffraction of Corrosion Products Formed on Iron Surfaces

Atomic-Scale Structure and Morphology of Ferric Oxyhydroxides Formed by Corrosion of an Iron–Silicon Alloy

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Protective Rust Layer Formed on Weathering Steel by Atmospheric Corrosion for a Quarter of a Century

Cited by 59 publications

References 18 publications

Characteristic Behavior of Nickel Ions during Transformation of Green Rust to Ferric Oxyhydroxides in Aqueous Solution

Characteristic Behavior of Nickel Ions during Transformation of Green Rust to Ferric Oxyhydroxides in Aqueous Solution

<I>In-situ</I> X-ray Diffraction of Corrosion Products Formed on Iron Surfaces

Atomic-Scale Structure and Morphology of Ferric Oxyhydroxides Formed by Corrosion of an Iron&ndash;Silicon Alloy

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Atomic-Scale Structure and Morphology of Ferric Oxyhydroxides Formed by Corrosion of an Iron–Silicon Alloy