The old gray cast iron for water supply pipes in Yokohama City which was made in the UK in 1887 is highly corrosion resistant. The corrosion behavior of the old gray cast iron in soils was studied. For comparison, a gray cast iron used for modern pipes, a spheroidal graphite cast iron, and a carbon steel were tested. The corrosion potentials and corrosion rates were measured. The corrosion products and the base metals were analyzed by X-ray diffractometry and energy dispersion spectroscopy. The corrosion rate of the gray cast iron made in the UK in 1887 was lower than those of the others. The gray cast iron contains a large amount of steadite, which is a ternary eutectic (γ-Fe, Fe3C, and Fe3P). The network structure of steadite enclosed the corrosion products and decreased the corrosion rate.
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August 2014
This article was originally published in
Journal of Water Supply: Research and Technology-Aqua
Article Contents
Research Article|
November 26 2013
Higher corrosion resistance of old cast iron pipes installed for early stage of water supply network in Yokohama City
Yuuki Kuwahara;
1Graduate School of Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
E-mail: [email protected]
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Yoshikazu Miyata;
Yoshikazu Miyata
1Graduate School of Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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Shukuji Asakura;
Shukuji Asakura
1Graduate School of Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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Tadashi Shinohara;
Tadashi Shinohara
2National Institute for Materials Science, 1-2-1, Sengen, Tsukuba 305-0047, Japan
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Takao Yakou;
Takao Yakou
1Graduate School of Engineering, Yokohama National University, 79-5, Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
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Keiichi Shiimoto;
Keiichi Shiimoto
3Hinode Suido Kiki K.K., Iwasaki, Aza, Harukoga, Miyaki-chou, Miyaki-gun, Saga-pref 849-0101, Japan
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Keiji Inoue;
Keiji Inoue
3Hinode Suido Kiki K.K., Iwasaki, Aza, Harukoga, Miyaki-chou, Miyaki-gun, Saga-pref 849-0101, Japan
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Junichi Hatano
Junichi Hatano
4Yokohama Waterworks Bureau, 1-1, Minato-cho, Naka-ku, Yokohama, 231-0017, Japan
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Journal of Water Supply: Research and Technology-Aqua (2014) 63 (5): 391–397.
Article history
Received:
July 03 2013
Accepted:
October 24 2013
Citation
Yuuki Kuwahara, Yoshikazu Miyata, Shukuji Asakura, Tadashi Shinohara, Takao Yakou, Keiichi Shiimoto, Keiji Inoue, Junichi Hatano; Higher corrosion resistance of old cast iron pipes installed for early stage of water supply network in Yokohama City. Journal of Water Supply: Research and Technology-Aqua 1 August 2014; 63 (5): 391–397. doi: https://doi.org/10.2166/aqua.2013.225
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