Composition and protective ability of rust layer formed on weathering steel exposed to various environments

Kawamata, Takayuki; Hara, Shuichi; Harada, Miyuki; Yamashita, Masato; Uchida, Hitoshi

doi:10.1016/j.corsci.2005.10.004

Cited by 399 publications

(173 citation statements)

References 36 publications

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“…When the = is more than a certain value, the corrosion rate of the weathering steel was suppressed less than 0.01 mmy À1 which is the acceptable corrosion rate of the weathering steel coated by the protective rust layer. Moreover, Yamashita et al, 19,20) Shiotani et al 21) and Kamimura et al 11) have shown the correlation between corrosion rate and the mass ratio (= Ã ) of crystalline -FeOOH to the total mass of -FeOOH, -FeOOH and spinel-type iron oxide formed under chloride containing atmosphere. Those mass ratio indices, the = and = Ã , have been registered as the protective ability index (PAI) for the weathering steel rust layer.…”

Section: Composition and The Protective Ability Indexmentioning

confidence: 97%

X-ray Diffraction Analysis of Rust Layer on a Weathering Steel Bridge with Surface Treatment Using Synchrotron Radiation

Yamashita

Hara²,

Harada³

et al. 2007

Mater. Trans.

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Section: Composition and The Protective Ability Indexmentioning

confidence: 97%

X-ray Diffraction Analysis of Rust Layer on a Weathering Steel Bridge with Surface Treatment Using Synchrotron Radiation

Yamashita

Hara²,

Harada³

et al. 2007

Mater. Trans.

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“…13 These compounds are either soluble or are intermediates, and therefore avoid detection by infrared spectroscopy. The most easily detected compounds are obviously the most insoluble, and have been detected at high concentrations.…”

Section: Discussionmentioning

confidence: 99%

“…[5][6][7][8][9][10][11][12][13][14][15][16][17] Rust layers often form on the surface of steel structures experiencing a corrosion process, and the associated corrosion performance is dependent on a number of factors including rust formation, rust evolution and the inherent properties of the rust layers such as composition and structures. If pitting corrosion of HSLA steel occurs after prolonged exposure in the marine splash zone, as observed in R. Jeffery et al's exposure tests, 4 it can be speculated that the rust layer may contribute to the origins of pitting corrosion.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Performance of High Strength Low Alloy Steel AISI 4135 in the Marine Splash Zone

2017

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The corrosion behavior of high strength low alloy AISI 4135 steel was studied following extended exposure to a Qingdao field environment. When electrochemically active γ-FeOOH was formed in conjunction with easily reducible β-FeOOH, these corrosion products acted to accelerate corrosion attack in the marine splash zone (i.e., steel structure above the water line that is splashed by sea spray). It had also been observed that the pH beneath the rust layer exhibited a minimum during the non-splash part of wet and non-splash corrosion cycling. These acidic conditions contributed significantly to an increase in the rate of localized corrosion, both beneath the rust deposits and within rust cracks and voids within pockets of rust deposits over the steel surface.

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“…Higher amounts of oxyhydroxides enhance the corrosion protection ability of the skyward rust layers. 34) 3.5 N 2 adsorption studies of rust layers N 2 adsorption desorption isotherms of powedered rust layers of SOL, SIL, EOL, EIL are shown in Fig. 11(a) and (b) respectively.…”

Section: Cross-sectional Morphology Of Rust Layersmentioning

confidence: 99%

Weathering Steel in Industrial-Marine-Urban Environment: Field Study

et al. 2016

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In the present field study, we report the exposure of weathering steels in the industrial-marine-urban environment at Ennore, located near the east coast of India for 3 years. The Corrosion products viz., iron oxyhydroxides and oxides present in the rust layers were characterized using ATR-FTIR, XRD studies and quantified using TGA analysis. The specific surface area of the rust particles formed during the corrosion process were determined using N 2 adsorption isotherm studies. The morphology of the corrosion products were elucidated using SEM. ATR-FTIR and XRD studies showed that the corrosion products formed on the skyward surfaces were highly more crystalline than those on the the earthward surfaces. TGA showed that the iron oxyhydroxides were major corrosion products. N 2 adsorption-desorption studies confirmed the formation of compact inner rust layers with high specific surface area (SA). SEM analysis revealed that the skyward surface was smooth and compact while the earthward surface were cracked and porous. SEM images confirmed the formation of characteristic morphological structures such as sandy crystal (lepidocrocite), needle-like (goethite), cotton ball (goethite) and cigar shaped (akaganeite) structures. Further, it revealed the formation of goethite on the skyward surface as a major constituent phase in the rust layer, which was influenced by the presence of SO 2 content in the environment.

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Composition and protective ability of rust layer formed on weathering steel exposed to various environments

Cited by 399 publications

References 36 publications

X-ray Diffraction Analysis of Rust Layer on a Weathering Steel Bridge with Surface Treatment Using Synchrotron Radiation

X-ray Diffraction Analysis of Rust Layer on a Weathering Steel Bridge with Surface Treatment Using Synchrotron Radiation

Corrosion Performance of High Strength Low Alloy Steel AISI 4135 in the Marine Splash Zone

Weathering Steel in Industrial-Marine-Urban Environment: Field Study

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