Monitoring of Degradation Process of Heavy-Duty Coating on Internal Bottom Plate of Oil Storage Tank
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- ITO Daisuke
- Faculty of Engineering, Yokohama National University
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- TOKUTAKE Koya
- National Research Institute of Fire and Disaster
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- OKAZAKI Shinji
- Faculty of Engineering, Yokohama National University
Bibliographic Information
- Other Title
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- 石油タンク底板内面用重防食塗膜の劣化プロセス追跡
- 石油タンク底板内面用重防食塗膜の劣化プロセス追跡 : 温度勾配下におけるふくれ成長の定量的評価
- セキユ タンク ソコイタ ナイメンヨウ ジュウボウショク トマク ノ レッカ プロセス ツイセキ : オンド コウバイ カ ニ オケル フクレ セイチョウ ノ テイリョウテキ ヒョウカ
- -温度勾配下におけるふくれ成長の定量的評価-
- -Quantitative Evaluation of Blister Growth under Temperature Gradient-
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Description
The degradation process of a heavy-duty coating with blisters formed by a temperature difference across the resin was investigated by electrical impedance measurements and visual observations. The two effects of the coating thickness and the addition of the glass flakes were evaluated. From the coating impedance monitoring results for 105 days, it was demonstrated that the decrease of barrier property of the coating is inhibited by the addition of glass flakes. By visual observations, it was shown that the area of blisters and the black rust at the coating⁄steel substrate beneath blisters in thick coatings are larger than that in the thin coatings. On the other hand, the prolongation of the time for blistering of the coating could be achieved by the increase of the coating thickness. Finally, the electrical equivalent circuit (EEC) model was proposed for the residual lifetime evaluation of the coating. This model includes the constant phase element (CPE) , one of the circuit elements that can express coating impedance accurately. It was elucidated that the coating impedance can be well-described by the EEC model of the parallel combination of two CPEs.
Journal
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- Journal of High Pressure Institute of Japan
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Journal of High Pressure Institute of Japan 54 (1), 25-34, 2016
HIGH PRESSURE INSTITUTE OF JAPN(HPI)
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Keywords
Details 詳細情報について
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- CRID
- 1390282679594793728
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- NII Article ID
- 130005126556
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- NII Book ID
- AN00011762
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- ISSN
- 13479598
- 03870154
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- NDL BIB ID
- 027093294
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed