著者

川本 輝明

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.33, no.8, pp.478-479, 1984-08-15 (Released:2009-10-30)

参考文献数

4

著者

瀧原 幹夫

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.48, no.6, pp.338-344, 1999-06-15 (Released:2009-11-25)

参考文献数

10

---

This paper introduce stray current corrosion control and the committees related this problem, after described generation mechanism and control.Some problems of stray current corrosionarose immediately after construction of electric railway in Japan, in 1895. To solve this problems, the study was started and continued for 100 years up to now. Until the Taisho Era (-1926), major subject of the study was improvement of raiway return circuits, and drainage systems on underground metallic piping were added in the early Showa Era (1926-). After World War II, the study was resumed and plastic cable, coating systems for steel pipes, and impressed current systems for practical use, have been developed until now.The Study Committee on Stray Current Corrosion was established in 1933 by academic specialists, engineers of various utilities, and government authorities, and it has been still continuing research activities. The Co-ordinated Committees on Stray Current Corrosion were established in 5 districts. And these committees started research activities to solve problems such as co-ordinated interference.

著者

高橋 秀明 庄子 哲雄 鈴木 正彦

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.28, no.5, pp.292-302, 1979-05-15 (Released:2009-10-30)

参考文献数

16

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Based upon linear elastic fracture mechanics approach, a damage tolerance design philosophy for light water reactor pressure vessel and piping components where the presence of a significant crack is acceptable, was reviewed with special reference to stress corrosion cracking and corrosion fatigue subcritical crack growth.The published data of failure analysis were discussed from a viewpoint of fracture mechanics evaluation. Here, weld toe cracking in crude oil pipe-lines in Canada, and corrosion-pit initiated cracking in low pressure turbine discs at Hinckley Point ‘A’ and turbine shafts at Ferrybridge power stations in England were compared and discussed. Hence three parameters such as mechanical, metallurgical and environmental factors are taken into consideration.

著者

大橋 健也

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.49, no.11, pp.664-668, 2000-11-15 (Released:2011-12-15)

参考文献数

23

---

Thin film magnetic heads for high recording density rigid disk drives are composed of ceramics and metal multilayers. These metals take important role for read and write of information storage. It is a vital wound if the thin film metals suffer corrosion attack. Therefore, corrosion of thin film magnetic heads has been studied with surface analysis and electrochemical techniques in several related organizations. The author hopes some data introduced in this paper would helpful for comprehension of corrosion of magnetic heads and for prevention of the corrosion.

著者

下郡 一利

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.30, no.6, pp.349-357, 1981-06-15 (Released:2009-10-30)

参考文献数

45

被引用文献数

7 4

---

Service experiences were summarized on the hydrogen absorption by titanium and factors affecting the absorption were analyzed and reviewed both on environmental side and metallurgical side. Some environmental conditions have been known to cause this absorption but further investigations are still needed in the future. Several preventive methods, such as surface oxidation treatment, have been applied with satisfactory results in some cases.

著者

倉本 繁 菅野 幹宏

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.49, no.5, pp.265-270, 2000-05-15 (Released:2011-12-15)

参考文献数

31

被引用文献数

8 12

---

It is very important from a practical viewpoint to study hydrogen behavior in metals because hydrogen embrittlement has been related with concentration of hydrogen at the crack initiation sites. In order to reveal the mechanism of the embrittlement, experimental methods to characterize hydrogen concentration to localized area should be established. Hydrogen microprint technique (HMT) is a simple and powerful method to visualize hydrogen behavior in high resolution. When polished surface of a specimen is covered with nuclear emulsion containing numerous submicron particles of silver bromide, hydrogen in the specimen reduce the silver bromide. Thereby silver particles left on the surface after fixing represent the sites of hydrogen emission. In this article, details in experimental procedure of HMT are described with emphasis on functions of nuclear emulsion and fixing solution, and the results on hydrogen behavior in metals using HMT are reviewed. The effects of plastic deformation and stress gradient on hydrogen transport in metals are also presented in relation to the mechanisms of hydrogen embrittlement that have been proposed so far.

著者

吉田 平太郎

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.33, no.7, pp.409-416, 1984

著者

山下 嗣人

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.36, no.5, pp.315-316, 1987-05-15 (Released:2009-10-30)

参考文献数

6

著者

石原 靖子 奥村 浩

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.39, no.8, pp.432-440, 1990-08-15 (Released:2009-10-30)

参考文献数

10

---

Recently, scientific interest to plastic materials has been grown as the important materials in the various fields of biology. However, these materials are not always utilized efficiently. There are various levels of utilization among various fields of biology. In this paper, present situation and problems of the utilization of plastic materials was discussed concentratedly focusing in the fields of neural cell culture and fish farming.

著者

青山 芳夫

出版者

Japan Society of Corrosion Engineering

雑誌

防蝕技術 (ISSN:00109355)

巻号頁・発行日

vol.12, no.4, pp.185-187, 1963-04-15 (Released:2009-11-25)

参考文献数

15

---

The relays for railway signaling systems are abnormally attacked, when they are used under such conditions that electric discharges frequently take place on the surfaces of their contact points. As the corrosion products, silver nitrate (AgNO3) and basic copper nitrate [3Cu(OH)2⋅Cu(NO3)2] are formed on the surfaces of silver contacts and nickel coated bronze springs respectively. For the identification of these corrosion products, the interference and absorption procedures are found to be suitable.

著者

大境 彰

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.36, no.12, pp.799-805, 1987-12-15 (Released:2009-10-30)

参考文献数

6

---

The problem concerning electrolysis corrosion of pipe line caused by stray current from DC electrified railroad was fairly solved by appling drainage method. In this report next item is explained. (1) Leakage current from railroad and electrolysis corrosion. (2) Construction of drainage method. (3) Recent problem of them.

著者

筒井 光範

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.34, no.9, pp.526-527, 1985

著者

松本 桂一 篠原 孝順 笠松 昭宏

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.33, no.11, pp.643-648, 1984-11-15 (Released:2009-10-30)

参考文献数

13

被引用文献数

1 2

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As corrosion failures of 316L in urea synthesis solutions are due to either the active region dissolution or the corroison at the transition zone from the passive to the transpassive region, effects of process variables of the urea reactor on these two types of corrosion were electrochemically examined in order to advance the reliability of corrosion preventive methods. For making simple methods to evaluate resistance of 316L to the corrosion at the transition zone from the passive to the transpassive region, seven 316L specimens were immersed in an urea synthesis solution and the results were discussed by comparison with the results of Huey test and chemical compositions of the test specimens. The conclusions obtained are as followws.(1) 316L for the urea reactor required more amount of air to be injected for preventing active dissolution as the temperature of the reactor rose or the molar ratio of H2O/CO2 increased.(2) Sulfide, an impurity in CO2 gas, had a very detrimental effect on passivation of 316L. As it is not practical to compensate the harmfulness of sulfide by increase of the amount of air injection, the content of sulfide in CO2 gas should be lowered before feeding to the urea plant.(3) For reducing the corrosion at the transition zone from the passive to the transpassive region, higher molar ratio of NH3/CO2, lower ratio of H2O/CO2 and lower temperature were advantageous.(4) Sulfide was also harmful to this corrosion.(5) Annealed 316L was subject to weight loss owing to general corrosion and intergranular corrosion simultaneously at the transition zone from the passive to the transpassive region. Resistance of 316L to these two types of corrosion were correlated with Cr content in 316L and results of Huey test, respectively.

著者

太田 健一郎

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.33, no.5, pp.297-298, 1984-05-15 (Released:2009-10-30)

参考文献数

3

著者

松橋 亮 伊藤 叡 佐藤 栄次

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.40, no.11, pp.747-753, 1991-11-15 (Released:2009-11-25)

参考文献数

6

被引用文献数

7 8

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To clarify the physical meaning of general corrosion resistance index (GI) obtained through the alloy contents on general corrosion rate of stainless steels in sulfuric acid solution, the study of the effect of alloy contents, immersion time and temperature on the general corrosion rate was carried out in 10.2mol·kg-1 sulfuric acid solution. It was assured that dependence of alloy contents on corrosion rate of stainless steels was ascribed to the apparent activation energy obtained by Arrhenius plot, and from the thermodynamical consideration of GI value, GI was expressed as a function of alloy contents through the change of apparent activation energy due to corrosion reaction.

著者

能登谷 武紀

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.27, no.12, pp.661-670, 1978-12-15 (Released:2009-10-30)

参考文献数

130

被引用文献数

17 15

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This article is a review of recent literature on corrosion inhibitors for copper and copper alloys. Inhibitors are divided into two categories; (i) inorganic inhibitors, such as chromates, phosphates, and ferrous ions and (ii) organic inhibitors which include heterocyclic organic compounds, i. e., benzotriazole (BTA) and mercaptobenzothiazole (MBT) and their relative compounds. At present these are the most effective and widely used inhibitors in a variety of systems. The BTA derivatives such as tolyltriazole (TTA) and benzotriazole carboxylic acid will be the most promising inhibitors for copper and copper alloys. It is suggested that dimercaptothiadiazole (DMTDA) and triazinedithiol (TDT) and its derivatives may be used as a substitute of BTA. Effectiveness of both DMTDA and TDT is found to be better than BTA in some corrosive environments. Significant role of oxide films present on the metal surfaces is stressed in order to clarify the mechanism of protection performance of inhibitors. Long chain thio-compounds as film forming inhibitors are also described

著者

北村 義治 伊藤 順一

出版者

Japan Society of Corrosion Engineering

雑誌

防蝕技術 (ISSN:00109355)

巻号頁・発行日

vol.13, no.6, pp.256-261, 1964-06-15 (Released:2009-11-25)

参考文献数

3

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The corrosion of austenitic stainless steels and titanium in the aqueous solutions of several amino acid and their salts was investigated. The total immersion tests, the cell voltage-current curve method and the potentiostatic polarization curve method were adopted.The following experimental results were obtained: The aqueous solutions of acidic amino acids such as glutamic acid or homocysteic acid were comparatively corrosive, while neutral and basic amino acids scarcely; the corrosive behaviors of acid and basic salts of various amino acids bore some resemblance to those of acids and bases which were estimated to be freed from the salts.It is suggested that amino acids, which form salts with acids or bases, might have some neutralizing action on them, resulting in reduction in the corrosive effects of these salt solutions.

著者

松永 是

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.40, no.10, pp.687-693, 1991-10-15 (Released:2009-11-25)

参考文献数

19

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Magnetic bacteria synthesize magnetic particles which are aligned in chains and enveloped by a membrane. Magnetic particles isolated from magnetic bacteria could be useful because they are small in size, covered with lipid bilayers and do not aggregate. We have studied the mass culture of magnetic bacteria and their characterization and the application of bacterial magnetic particles. This review describes some of the recent advances towards bio-technological and medical applications of bacterial magnetic particles. Enzymes and antibodies may be immobilized on bacterial magnetic particles. These enzyme-magnetic particle and antibodymagnetic particle conjugates may then be used to produce biosensors for glucose and immunoglobulins, respectively. Bacterial magnetic particles have also been introduced into red blood cells by cell fusion, and into leucocytes by phagocytosis. Moreover, gene cloning system of magnetic bacteria was also developed.

著者

鶴田 孝雄

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.34, no.2, pp.135-139, 1985-02-15 (Released:2009-10-30)

参考文献数

28

被引用文献数

3 4

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Recent advances in the understanding of thermodynamic properties of aqueous electrolyte solutions at elevated temperatures, which is needed to calculate pH, are briefly reviewed, and examples of pH measurements at elevated temperatures are described.

著者

佐藤 教男

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.39, no.9, pp.495-511, 1990-09-15 (Released:2009-10-30)

参考文献数

55

被引用文献数

4 3

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A review is given of some simplified concepts that will contribute to a better understanding of corrosion fundamentals. The corrosion process involves not only electrochemical reactions but also acid-base reactions, and it is the acid-base nature that diversifies the corrosion phenomena. Anions either catalyze or inhibit the anodic metal dissolution, and the passivation will result from the hydroxide-catalyzed mechanism of metal dissolution. Corrosion precipitates frequently control the selective mass transport in corrosion processes. Anion-selective precipitates accelerate and cation-selective precipitates decelerate corrosion propagation. A bipolar precipitate film, if anodically polarized, undergoes deprotonation and turns into a passive film. The electrochemical stability of passivated metals is determined by the electron energy band structure of the passive film. The passive film of n-type semiconducting oxides appears electrochemically more stable than the passive film of p-type semiconducting oxides.