巻号一覧
62 巻 (2024)
- 3 号 p. 106-
- 2 号 p. 58-
- 1 号 p. 4-
前身誌
62 巻, 2 号
選択された号の論文の3件中1～3を表示しています
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論文
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石川 忠, 中島 清孝, 緒方 洋典, 山本 元道, 松岡 和彦, 谷野 忠和, 矢島 浩2024 年 62 巻 2 号 p. 58-69
発行日: 2024年
公開日: 2024/06/13
ジャーナル フリーSteel plates cladded by stainless steel in mid-section and C-Mn steel in surface layers (Stainless sandwich cladded steel plates), and C-Mn steel plates with ultra-fine grained surface layers (SUF steel plates) were previously developed, prototyped, and examined as brittle unstable crack arrest steel plates. Using these test results obtained at the time of development have been rearranged and evaluated at present, and the crack arrest performance against brittle unstable crack was discussed in this paper.
As a result, the following points were obtained.
1) In the case of a stainless sandwich cladded steel plate with a total thickness of 10 mm and a stainless steel layer thickness of 5 mm, even if brittle unstable cracks occur in the carbon steel layer arranged on the front and back layers, it will function effectively as a crack arrester plate at a temperature of －190℃ or higher. Brittle unstable fracture will not occur throughout the plate thickness.
2) The brittle unstable crack arresting performance of SUF steel plates with the chemical composition used for normal ship hull steel plates is almost equivalent to the upper limit of the brittle unstable crack arresting performance of general low temperature steel plates. In other words, at temperatures above －80℃, a 25 mm thick SUF steel plate is effective as a crack arrester steel plate.抄録全体を表示PDF形式でダウンロード (2628K)
解説
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吉田 聖一2024 年 62 巻 2 号 p. 70-78
発行日: 2024年
公開日: 2024/06/13
ジャーナル 認証ありOn March 17, 2019, an aboveground naphtha storage tank caught fire at a tank terminal of Intercontinental Terminals Company in Deer Park, Texas, USA. The fire spread to other 12 tanks. The fire lasted three days and was extinguished on March 20. The secondary containment dike surrounding these tanks collapsed, and a large amount of contaminated water which included tank contents, fire extinguishing foam and fire fighting water flowed into the adjacent ship channel. This created an environmental problem. The U.S. Chemical Safety and Hazard Investigation Board (CSB) conducted the incident investigation and issued the final report on July 6, 2023. This paper describes the outline of this incident based on the CSB report.抄録全体を表示PDF形式でダウンロード (1169K)
資料
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徳武 皓也2024 年 62 巻 2 号 p. 79-88
発行日: 2024年
公開日: 2024/06/13
ジャーナル 認証ありThe application of a lining on the inner surface of steel single-shell underground oil storage tanks (USTs) is effective as a corrosion prevention measure, but its anti-corrosion performance decrease over time. Therefore, it is necessary to evaluate the lifetime of the lining in terms of the anti-corrosion performance by using non-destructive inspection. However, the definition of the lifetime and its relationship to numerical values of the non-destructive inspection is not clear. In this study, the electrical property and the adhesion of the inner lining in contact with petroleum fuel for a long period was investigated. The anti-corrosion performance degradation of the lining was evaluated based on the glass flake coating’s evaluation standard of HPIS G105 TR(2017).
Based on the tanδ1kHz, which is one of the electrical properties, the lining was evaluated as good in all samples. On the other hand, the lining was evaluated as poor in some parts in terms of the adhesion. The lining inside the tank swells due to petroleum fuel, causing damage to the lining’s resin itself and the lining/steel plate interface. This leads to poor adhesion. However, because there would be little water and ions inside the tank that cause active corrosion and decrease electrical property, tanδ is difficult to decrease. Thus, it is thought that the degradation of the adhesion occurs before that of the electrical property in the inner lining of USTs. If degradation in the anti-corrosion performance of the lining is defined as a decrease in the adhesion due to swelling, it is possible to quantitatively evaluate the anti-corrosion performance by using the speed of sound of ultrasonic, which is a non-destructive inspection value linked to swelling.抄録全体を表示PDF形式でダウンロード (1340K)
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