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Zairyo-to-Kankyo
Vol. 61 (2012), No. 5

Zairyo-to-Kankyo Vol. 61 (2012), No. 5

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

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01 Oct. (Last 30 Days)

Zairyo-to-Kankyo Vol. 61 (2012), No. 5

Subject and Future on Development for Inhibitor

Sumio Akashi

pp. 201-

DOI:

10.3323/jcorr.61.201

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Article Title

Subject and Future on Development for Inhibitor

Bibtex

Ris

Effects of Metal Ions on Pitting Potential and Pit Growth Behavior for 316L Stainless Steel

Yoshinori Isomoto, Shinya Matsuo

pp. 213-218

DOI:

10.3323/jcorr.61.213

Abstract

A potentiostatic method was used to measure pitting potential for SUS316L stainless steel and compared with a potentiodynamic polarization method standardized by JIS G 0577. Test conditions were sodium chloride solutions from 0.008 to 1 M containing metal ions less than 110 ppm at temperatures of 300 and 323 K. The pitting potentials of SUS316L steel decreased with the increases in concentration of chloride ions and in temperature. The test results of pitting potential were consistent between the potentiostatic and potentiodynamic polarization methods. The presence of metal ions in a 0.08 M sodium chloride solution greatly decreased the pitting potential of SUS316L steel. Pits were grown from a steel surface by using a galvanostatic method proposed in this study, and observed in a cross-sectional surface after the growth tests. As a results, it is found that the low current density or metal irons of Mn²⁺ and Cr³⁺ added in the sodium chloride solution changed the aspect ratio of cross-sectional pit morphology and promoted deeper pit growth. Mechanisms of pit initiation and growth were discussed in this study.

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Article Title

Effects of Metal Ions on Pitting Potential and Pit Growth Behavior for 316L Stainless Steel

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Ris

Corrosion Behavior of Austenitic Stainless Steels on the Cut Edge Surface

Tomoaki Saida, Takuya Yamamoto, Katsuaki Sato, Shigeru Nakamura, Masazumi Okido

pp. 219-226

DOI:

10.3323/jcorr.61.219

Abstract

The cut edge surface of the stainless steel sheet is susceptible to corrosion compared with the surface of the sheet. At the cut edge surface, red rust easily tends to occur by the attack of chloride ion. However, there are still a lot of points not clear about the cause of the cut edge corrosion.
The salt spray test and the immersion test using NaCl solutions were conducted to evaluate corrosion resistance for the shear cut edge of SUS304 (18Cr-8Ni) and SUSXM7 (18Cr-9Ni-3Cu) cold rolled strips. It was found that transverse section (T section) corroded easier than longitudinal section (L section). In addition, the rust at the machined edge was less than shear cut edge.
The difference of the corrosion behavior in each section, L and T, was investigated by the electrochemical method. In anodic polarization curves at T section, the current density rose gradually at the less-noble potential than the L section. By the SEM observation and EPMA elemental mappings after anodic polarization measurement, it was considered that non-metallic inclusions (MnS etc.) extended along the metal flow of rolling direction influenced on the initiation and the growth of pitting corrosion.

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Article Title

Corrosion Behavior of Austenitic Stainless Steels on the Cut Edge Surface

Bibtex

Ris

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Zairyo-to-Kankyo Vol. 61 (2012), No. 5

Keyword Ranking

blast furnace

古代製鉄

鉄

smelting furnaces

jang-sik park

korea

three kingdoms period

archaeology

deformation of inclusion during rolling

dp steel hydrogen embrittlement

Zairyo-to-Kankyo Vol. 61 (2012), No. 5

Subject and Future on Development for Inhibitor

Share it with SNS

Effects of Metal Ions on Pitting Potential and Pit Growth Behavior for 316L Stainless Steel

Share it with SNS

Corrosion Behavior of Austenitic Stainless Steels on the Cut Edge Surface

Share it with SNS

Article Access Ranking

Deformation-induced martensitic transformation at tensile and compressive deformations of bainitic steels with different carbon contents

Alloying effects on the microstructure of Fe-1mass%M binary alloys treated by austenitic nitriding and quenching treatment

Hydrogen effects on fracture resistances of bulk cementite evaluated by in-situ microbending test during cathodic hydrogen charging

Effect of slag phase on dephosphorization in BOF

Iron Ore Granulation for Sinter Production: Developments, Progress, and Challenges

Numerical simulation of bubble breakup and coalescence behavior in gas-stirred ladle

Examples of Fractured Steel Parts during Actual Usage due to Hydrogen Embrittlement and Consideration Regarding the Behavior of Hydrogen at the Prior Austenite Grain Boundary

Production and Technology of Iron and Steel in Japan during 1988

Surface and Grain Boundary Segregation on and in Iron and Steels

Effect of Oxygen Potential on Mineral Formation in Lime-fluxed Iron Ore Sinter

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