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Zairyo-to-Kankyo
Vol. 64 (2015), No. 4

Zairyo-to-Kankyo Vol. 64 (2015), No. 4

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

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Vol. 73 (2024)
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Vol. 64 (2015)
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08 Oct. (Last 30 Days)

Zairyo-to-Kankyo Vol. 64 (2015), No. 4

Resolution of the Presidency

Nobuyoshi Hara

pp. 103-104

DOI:

10.3323/jcorr.64.103

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Article Title

Resolution of the Presidency

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Development of Environmentally Acceptable Technology for Cooling Water Treatment

Shinichi Takasaki

pp. 114-120

DOI:

10.3323/jcorr.64.114

Abstract

The technology of non-toxic corrosion inhibitors developed as a replacement of chromate in cooling water treatment was reviewed. Polyphosphate and phosphonate react with mother metal ion to form a protective film at anodic sites. On the other hand they form a protective film by precipitation with zinc ions and / or calcium ions at cathodic sites depending on their concentration. Acryl acid based polymer or maleic acid based polymer used as scale inhibitor enhances the effectiveness of cathodic inhibitors for carbon steel, and also made possible to increase the cycle number of concentration in cooling water and to decrease the total amount of phosphate in effluent water. The developments of green inhibitors, scale inhibitors for silica scale, non-chemical water treatment devices, and so on are expected in future.

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Development of Environmentally Acceptable Technology for Cooling Water Treatment

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High-temperature Corrosion Behavior of Heat-resistant Cast Alloys in a Low-grade Fuel Firing Boiler Ash Environment

Osamu Takahashi, Yuhua Su, Yo Tomota

pp. 132-138

DOI:

10.3323/jcorr.64.132

Abstract

In industrial boilers that use low-grade fuel, high-temperature sulfidation corrosion and vanadium attack have been major issues. High-temperature corrosion tests using actual boiler ash were performed for six heat-resistant cast alloys as candidate materials for burner chips and swirlers. At 850°C, corrosion was not sever, and SCH2 and 50Cr50Ni exhibited particularly good corrosion resistance. However, at 1050°C, corrosion weight loss of 50Cr50Ni, 30Cr70Ni, SCH13, and SCH22 dramatically increased, whereas that of 60Cr40Ni and Ni-less SCH2 was relatively small. Such corrosion mechanisms are discussed on the basis of microstructure observations and the results of EBSD and EDX analyses.

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High-temperature Corrosion Behavior of Heat-resistant Cast Alloys in a Low-grade Fuel Firing Boiler Ash Environment

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Comparison of Photo Degradation Behavior of LDPE using Accelerated Weathering Instruments

Takashi Miwa, Yukitoshi Takeshita, Yuichi Akage, Masamitsu Watanabe, Masaaki Takaya, Takashi Sawada

pp. 139-144

DOI:

10.3323/jcorr.64.139

Abstract

Samples of low-density polyethylene (LDPE) were photodegraded using accelerated weathering instruments and outdoor exposure. The physical properties and chemical structures of the photodegraded samples were studied through a tensile test, gel chromatography, and infrared spectroscopy. The molecular weight distribution of a photodegraded sample by using a fluorescent UV lamp at a high black panel temperature (80°C) was more similar to that of an outdoor-degraded sample than that of other artificially photodegraded samples by using a Xenon lamp at the standard black panel temperature (63°C). It is estimated that accelerated weathering tests at a high sample temperature could accelerate cross-linking than chain scission, consequently recreating molecule-enlargement similar to the outdoor-degraded sample.

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Article Title

Comparison of Photo Degradation Behavior of LDPE using Accelerated Weathering Instruments

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Ris

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08 Oct. (Last 30 Days)

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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

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

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Cost of Corrosion in Japan

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Zairyo-to-Kankyo Vol. 64 (2015), No. 4

Keyword Ranking

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

calcium carbonate

current trends on deep learning techniques applied in iron and steel making field: a review

fracture toughness grain size

grain curvature

mold flux

oxide vapour high temperature

Zairyo-to-Kankyo Vol. 64 (2015), No. 4

Resolution of the Presidency

Share it with SNS

Development of Environmentally Acceptable Technology for Cooling Water Treatment

Share it with SNS

High-temperature Corrosion Behavior of Heat-resistant Cast Alloys in a Low-grade Fuel Firing Boiler Ash Environment

Share it with SNS

Comparison of Photo Degradation Behavior of LDPE using Accelerated Weathering Instruments

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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