Mössbauer studies on particle volume distribution of α-FeOOH in rust formed on weathering steel

Takuya Okada; Yasuyuki Ishii; Tadashi Mizoguchi; Ichiro Tamura; Yoshio Kobayashi; Yasuo Takagi; Shigeru Suzuki; Hiroshi Kihira; Minoru Itou; Akira Usami; Kouji Tanabe; Kazuhiro Masuda

doi:10.1143/jjap.39.3382

Mössbauer studies on particle volume distribution of α-FeOOH in rust formed on weathering steel

Takuya Okada, Yasuyuki Ishii, Tadashi Mizoguchi, Ichiro Tamura, Yoshio Kobayashi, Yasuo Takagi, Shigeru Suzuki, Hiroshi Kihira, Minoru Itou, Akira Usami, Kouji Tanabe, Kazuhiro Masuda

Research output: Contribution to journal › Article › peer-review

65 Citations (Scopus)

Abstract

Rust formed on weathering steel and that on mild steel were studied by Mössbauer spectroscopy at various temperatures from room temperature to 12 K. The observed spectra were decomposed into the contribution of fine antiferromagnetic particles of α-FeOOH (85 at.%, T_N = 403 K) and that of γ-FeOOH (15 at.%, T_N = 73 K). Volume distributions of α-FeOOH particles obtained by analyzing the superparamagnetic relaxation effect on Mössbauer spectra show the following distinct characteristics: While 83 vol% of α-FeOOH particles in the rust on mild steel are larger than 7.5 × 10^-24 m³ and the rest of them (17 vol%) are smaller than 3.0 × 10^-24 m³, the rust on weathering steel shows a continuous and wide volume distribution down to the ultrafine particle region (smaller than 3.0 × 10^-24 m³) without a missing region, and 53 vol% of particles are smaller than 7.5 × 10^-24 m³. It is understood that this continuous volume distribution of α-FeOOH particles in the rust on weathering steel is favorable for accommodating a closely packed structure in the protective rust layer on weathering steel.

Original language	English
Pages (from-to)	3382-3391
Number of pages	10
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	39
Issue number	6 A
DOIs	https://doi.org/10.1143/jjap.39.3382
Publication status	Published - 2000
Externally published	Yes

Keywords

Collective excitation
Mössbauer spectroscopy
Particle volume distribution
Rust
Superparamagnetic relaxation
Weathering steel
α-FeOOH

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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Okada, T., Ishii, Y., Mizoguchi, T., Tamura, I., Kobayashi, Y., Takagi, Y., Suzuki, S., Kihira, H., Itou, M., Usami, A., Tanabe, K., & Masuda, K. (2000). Mössbauer studies on particle volume distribution of α-FeOOH in rust formed on weathering steel. Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, 39(6 A), 3382-3391. https://doi.org/10.1143/jjap.39.3382

Mössbauer studies on particle volume distribution of α-FeOOH in rust formed on weathering steel. / Okada, Takuya; Ishii, Yasuyuki; Mizoguchi, Tadashi; Tamura, Ichiro; Kobayashi, Yoshio; Takagi, Yasuo; Suzuki, Shigeru; Kihira, Hiroshi; Itou, Minoru; Usami, Akira; Tanabe, Kouji; Masuda, Kazuhiro.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 39, No. 6 A, 2000, p. 3382-3391.

Research output: Contribution to journal › Article › peer-review

Okada, T, Ishii, Y, Mizoguchi, T, Tamura, I, Kobayashi, Y, Takagi, Y, Suzuki, S, Kihira, H, Itou, M, Usami, A, Tanabe, K & Masuda, K 2000, 'Mössbauer studies on particle volume distribution of α-FeOOH in rust formed on weathering steel', Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, vol. 39, no. 6 A, pp. 3382-3391. https://doi.org/10.1143/jjap.39.3382

Okada, Takuya ; Ishii, Yasuyuki ; Mizoguchi, Tadashi ; Tamura, Ichiro ; Kobayashi, Yoshio ; Takagi, Yasuo ; Suzuki, Shigeru ; Kihira, Hiroshi ; Itou, Minoru ; Usami, Akira ; Tanabe, Kouji ; Masuda, Kazuhiro. / Mössbauer studies on particle volume distribution of α-FeOOH in rust formed on weathering steel. In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2000 ; Vol. 39, No. 6 A. pp. 3382-3391.

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abstract = "Rust formed on weathering steel and that on mild steel were studied by M{\"o}ssbauer spectroscopy at various temperatures from room temperature to 12 K. The observed spectra were decomposed into the contribution of fine antiferromagnetic particles of α-FeOOH (85 at.%, TN = 403 K) and that of γ-FeOOH (15 at.%, TN = 73 K). Volume distributions of α-FeOOH particles obtained by analyzing the superparamagnetic relaxation effect on M{\"o}ssbauer spectra show the following distinct characteristics: While 83 vol% of α-FeOOH particles in the rust on mild steel are larger than 7.5 × 10-24 m3 and the rest of them (17 vol%) are smaller than 3.0 × 10-24 m3, the rust on weathering steel shows a continuous and wide volume distribution down to the ultrafine particle region (smaller than 3.0 × 10-24 m3) without a missing region, and 53 vol% of particles are smaller than 7.5 × 10-24 m3. It is understood that this continuous volume distribution of α-FeOOH particles in the rust on weathering steel is favorable for accommodating a closely packed structure in the protective rust layer on weathering steel.",

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author = "Takuya Okada and Yasuyuki Ishii and Tadashi Mizoguchi and Ichiro Tamura and Yoshio Kobayashi and Yasuo Takagi and Shigeru Suzuki and Hiroshi Kihira and Minoru Itou and Akira Usami and Kouji Tanabe and Kazuhiro Masuda",

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AU - Kobayashi, Yoshio

AU - Takagi, Yasuo

AU - Suzuki, Shigeru

AU - Kihira, Hiroshi

AU - Itou, Minoru

AU - Usami, Akira

AU - Tanabe, Kouji

AU - Masuda, Kazuhiro

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AB - Rust formed on weathering steel and that on mild steel were studied by Mössbauer spectroscopy at various temperatures from room temperature to 12 K. The observed spectra were decomposed into the contribution of fine antiferromagnetic particles of α-FeOOH (85 at.%, TN = 403 K) and that of γ-FeOOH (15 at.%, TN = 73 K). Volume distributions of α-FeOOH particles obtained by analyzing the superparamagnetic relaxation effect on Mössbauer spectra show the following distinct characteristics: While 83 vol% of α-FeOOH particles in the rust on mild steel are larger than 7.5 × 10-24 m3 and the rest of them (17 vol%) are smaller than 3.0 × 10-24 m3, the rust on weathering steel shows a continuous and wide volume distribution down to the ultrafine particle region (smaller than 3.0 × 10-24 m3) without a missing region, and 53 vol% of particles are smaller than 7.5 × 10-24 m3. It is understood that this continuous volume distribution of α-FeOOH particles in the rust on weathering steel is favorable for accommodating a closely packed structure in the protective rust layer on weathering steel.

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KW - Superparamagnetic relaxation

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