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

Nishimura, Toshiyasu

doi:10.2320/matertrans.mra2007039

Cited by 23 publications

(12 citation statements)

References 21 publications

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“…The spectra at P (3,4) in the Cr-Si rich layer and at P (5,6) in the interface have the same shape 2 peaks at 108 and 116 eV. In the previous paper, 14,17) EELS spectra of Si oxides were detected including standard chemicals of Si and SiO2. The above spectra are similar to that of SiO2.…”

Section: Surface Analysis Of the Rust On 28 Mn Shape Memory Alloymentioning

confidence: 91%

Nano Structure of the Rust Formed on an Iron-based Shape Memory Alloy (Fe–Mn–Si–Cr) in a High Chloride Environment

Nishimura

2014

ISIJ Int.

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The corrosion resistance of an Iron-based shape memory alloy (28 Mn: Fe-Mn-Si-Cr) was estimated by using wet and dry corrosion test. The structure of the rust formed on the alloy was examined via EELS (Electron Energy Loss Spectroscopy) using TEM (Transmission Electron Microscopy) analysis. The electrochemical behavior of the 28 Mn alloy was investigated via EIS (Electrochemical Impedance Spectroscopy). The 28 Mn alloy showed a much higher corrosion resistance than SM (carbon steel) in wet and dry corrosion test. In EIS measurement following the corrosion tests, the 28 Mn alloy exhibited a much larger value of corrosion resistance (Z1mHz) as compared to SM, which can be attributed to rust formation. TEM analysis indicated that the inner rust was composed of Mn-rich, Cr-Si rich and interface layer. The corrosion resistance was primarily dependent on the Cr-Si rich layer, and further supported by the Mn rich layer. It was found that the 28 Mn alloy could maintain a protective rust layer composed of effective elements in the wet and dry environment.

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Section: Surface Analysis Of the Rust On 28 Mn Shape Memory Alloymentioning

confidence: 91%

Nano Structure of the Rust Formed on an Iron-based Shape Memory Alloy (Fe–Mn–Si–Cr) in a High Chloride Environment

Nishimura

2014

ISIJ Int.

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“…The alloying elements added to the weathering steel will precipitate the corrosion products in the form of oxides, which plays an important role in the growth of the rust layer [12]. T Nishimura et al showed that Si alloying elements exist as Si 2+ in the corrosion products and combine with Al and Fe to form complex oxides [20,29,30]. The powder of the rust layer after 120 cycles close to the WS0.48Si steel matrix was analyzed.…”

Section: Elemental Analysis Of the Internal Rust Layermentioning

confidence: 99%

Effect of Si Content on the Corrosion Behavior of 420 MPa Weathering Steel

Sun

Zhang

et al. 2019

Metals

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: The effect of Si content (0.12%, 0.34%, and 0.48%) on the corrosion behavior of weathering steel in a simulated marine environment was investigated in a dry/wet alternating cycle corrosion experiment. Corrosion weight gain, X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and electrochemical methods were used to measure the regularity and nature of the rust. The results show that the corrosion process could be divided into an initial stage where the corrosion rate increased and a later stage where the corrosion rate decreased before remaining stable. The corrosion rate was the lowest for a Si content in the weathering steel of 0.48%. The corrosion products of all three steel groups contains α-FeOOH, β-FeOOH, γ-FeOOH, Fe3O4, and large amounts of amorphous compounds. Furthermore, Si benefits the transformation of β-FeOOH and γ-FeOOH to stable phases. The addition of the Si alloying element is beneficial to the formation of dense and compact rust layers that enhance the electrochemical resistance of weathering steel and silicon oxide influences the self-corrosion potential of the corrosion products.

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“…In contrast, there have been few reports on the effect of Si and Al on the atmospheric corrosion of steels in saline environments [19][20][21]. In this paper, the formation process and electrochemical behavior of the rust formed by Si-Al-bearing UFG steels under a cyclic wet/dry condition are described.…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of Si–Al-bearing ultrafine-grained weathering steel

Nishimura

2008

Science and Technology of Advanced Materials

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In the Ultra-steel project at the National Institute for Materials Science (NIMS), which run from 1996 to 2005, high-Si-Al-content ultrafine-grained (UFG) weathering steel was developed by grain refinement and weathering guidance. It was found that this steel has excellent strength, toughness and corrosion resistance. Samples were prepared by multi pass warm rolling at temperatures between 773 and 873 K. The grain size of steel rolled at 873 K was about 1 µm, and the tensile strength (TS) and elongation (EL) had excellent values of 800 MPa and 20%, respectively. In general, steels with high Si and Al contents exhibit inferior toughness to carbon steel (SM); however, the toughness of the developed sample was markedly improved by grain refinement. Cyclic corrosion tests in the presence of chloride ions confirmed that the developed steel exhibited excellent corrosion resistance, superior to that of SM. Electron probe microanalysis (EPMA) and transmission electron microscopy (TEM) analyses showed that Si and Al mainly exist in the inner rust layer. Si and Al were identified as existing in the Si 2+ and Al 3+ states in the nanoscale complex oxides constituting the inner rust layer. Electrochemical impedance spectroscopy (EIS) measurement showed that the corrosion reaction resistance (R t ) of the developed steel was much greater than that of SM. In the developed steel, the nanoscale complex oxides were formed in the inner rust layer, which increased R t , and resulted in the excellent corrosion resistance.

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

Cited by 23 publications

References 21 publications

Nano Structure of the Rust Formed on an Iron-based Shape Memory Alloy (Fe–Mn–Si–Cr) in a High Chloride Environment

Nano Structure of the Rust Formed on an Iron-based Shape Memory Alloy (Fe–Mn–Si–Cr) in a High Chloride Environment

Effect of Si Content on the Corrosion Behavior of 420 MPa Weathering Steel

Corrosion resistance of Si–Al-bearing ultrafine-grained weathering steel

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