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Zairyo-to-Kankyo
Vol. 58 (2009), No. 5

Zairyo-to-Kankyo Vol. 58 (2009), No. 5

ONLINE ISSN:	1881-9664
PRINT ISSN:	0917-0480
Publisher:	Japan Society of Corrosion Engineering

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Zairyo-to-Kankyo Vol. 58 (2009), No. 5

Structural Deterioration and Monitoring

Kazumi Matzuoka

pp. 169-169

DOI:

10.3323/jcorr.58.169

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Article Title

Structural Deterioration and Monitoring

Bibtex

Ris

The Points in Application of Post Construction Code from View Point of Corrosion in Japan

Yasuhiro Hara

pp. 170-175

DOI:

10.3323/jcorr.58.170

Abstract

In the U.S and Europe, the post construction code, based on the ratiocinative and economic methods of maintenance have been developed. In Japan, having many aged equipment, the prompt improvement of post construction code is eagerly expected. This review indicates the summary of related corrosion items in American post construction code of RBI, FFS, and repair welding respectively, and the handling of flaws of high pressure gas security code in Japan in comparison to American post construction code. After that, the points in application of post construction code are shown in case of corrosion.

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The Points in Application of Post Construction Code from View Point of Corrosion in Japan

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Modeling of Chemical Transition of Nitrate Accompanied with Corrosion of Carbon Steel under Alkaline Conditions

Akira Honda, Kaoru Masuda, Tsuyoshi Imakita, Osamu Kato, Tsutomu Nishimura

pp. 182-189

DOI:

10.3323/jcorr.58.182

Abstract

Interaction between carbon steel and nitrate was modeled using the mixed potential concept. Carbon steel was selected as an example of metal components in the repository of radioactive wastes. The nitrate reduction accompanied with the corrosion of carbon steel was modeled as a reaction series of NO₃^– → NO₂^– → NH₃. The sum of the current of the reaction series of NO₃^– → NO₂^– → NH₃ and that of water reduction was assumed to be balanced with the oxidation current of carbon steel. The input parameters for this kinetic model were determined by electrochemical measurements and immersion tests. The results of the immersion tests can be interpreted by the analyses of the model.

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Modeling of Chemical Transition of Nitrate Accompanied with Corrosion of Carbon Steel under Alkaline Conditions

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Spallation of the Oxide Scale Formed on TiAl Alloys

Michiko Yoshihara, Yu Tanaka, Saburo Katayama

pp. 190-196

DOI:

10.3323/jcorr.58.190

Abstract

The binary TiAl alloys and TiAl-based alloys were isothermally oxidized in air, and the oxidation behavior and scale spallation have been investigated. The mass gain due to oxidation of the TiAl-based alloys containing Nb, W or Ta is smaller than that of binary TiAl alloys, because of the suppression of TiO₂ growth by the so-called doping effect. The TiAl-based alloys show better scale adhesion than binary TiAl alloys. Although the scales formed on the alloys have similar structure regardless of the alloy composition, the scale/alloy interface of the TiAl-based alloys seems to have good contact compared with that of the binary alloys. The densities of the oxide scales formed on the alloys estimated from the mass gain and the scale thickness are found to be about a half value of the expected one for the completely densified oxides. This is attributable to the formation of the large amount of cavities and pores in the scale. The coefficient of the thermal expansion (CTE) of the alloys decreases with increase of the content of additional elements in the alloy. The better scale adhesion of the TiAl-based alloys may result from the structure of scale/alloy interface and low CTE value of the alloys.

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Article Title

Spallation of the Oxide Scale Formed on TiAl Alloys

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Zairyo-to-Kankyo Vol. 58 (2009), No. 5

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impact delta ferrite

hrx19

analysis of generation mechanism of unimodal and bimodal waveform detection signals of a whole roll flatness meter

austenite ferrite grain curvature

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Zairyo-to-Kankyo Vol. 58 (2009), No. 5

Structural Deterioration and Monitoring

Share it with SNS

The Points in Application of Post Construction Code from View Point of Corrosion in Japan

Share it with SNS

Modeling of Chemical Transition of Nitrate Accompanied with Corrosion of Carbon Steel under Alkaline Conditions

Share it with SNS

Spallation of the Oxide Scale Formed on TiAl Alloys

Share it with SNS

Article Access Ranking

Current Trends on Deep Learning Techniques Applied in Iron and Steel Making Field: A Review

Phonon mean free path of silicate glasses: a useful parameter to distinguish between framework and nonframework cations

Effect of Wettability on Droplet Agglomeration in Two Immiscible Liquids

Arc-plasma-assisted laser-induced breakdown spectroscopy (AP-LIBS): A Study on Signal Enhancement and Spatiotemporal Distribution

Effect of microalloying of V, Nb and Mo on hydrogen embrittlement susceptibility of 2 GPa-grade medium-carbon Si–Cr spring steel with tempered martensite microstructure

Ductility loss of a metastable austenitic stainless steel and its TIG weldment due to hydrogen embrittlement at low temperatures considering the effect of pre-strain at 4K

Effect of Binder Adsorption Characteristics of Coal on Cold Strength for Ferro-coke Briquette

Cost of Corrosion in Japan

Cost of Corrosion in Japan

Study of Optimum Silicon Content between Iron-making and Steel-making Process on the Hot Metal Pretreatment

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