著者

柴田 芳昭 今濱 敏信 和気 敏治 関根 功 川瀬 哲也 城元 孝之 湯浅 真

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.41, no.8, pp.525-534, 1992-08-15 (Released:2009-11-25)

参考文献数

36

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The effect of tannic acid on the corrosion of mild steel in boiler systems was investigated by physicochemical methods using an autoclave and a test boiler. Tannic acid was found to be a good oxygen scavenger at pH 11 as well as hydrazine and sodium sulphite. Tannic acid inhibited corrosion of steel (i) at room temperature and atmospheric pressure and (ii) at high temperature and pressure. The maximum inhibition efficiency was about 97%. The inhibiting behavior of tannic acid at pH 7 was different from that at pH 11. At pH 7, tannic acid acted as an adsorption-type inhibitor and suppressed catholic reaction of corrosion of steel. At pH 11, tannic acid inhibited corrosion of steel not only as an effective oxygen scavenger but also an effective Schikorr reaction promoter (formation of Fe3O4). Tannic acid is believed to be an effective inhibitor in boiler systems.

著者

滝沢 貴久男

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.2, pp.96-104, 1987-02-15 (Released:2009-10-30)

参考文献数

45

被引用文献数

1

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This review describes the effects of environmental and metallurgical factors on the corrosion behaviour of stainless steel in organic acids as a food additive. That is to say, it gives an outline of the corrosive action of organic acids on the stainless steel and the relationship between metallurgical factors such as nonmetallic inclusions and alloying elements and corrosion resistance.

著者

中川 雅晴

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.53, no.3, pp.112-117, 2004-03-15 (Released:2011-12-15)

参考文献数

24

被引用文献数

5 3

---

現在, チタン製の口腔インプラントや歯科修復物の臨床応用が増加しているが, う蝕予防のために多用されるフッ素によってチタンやチタン合金が腐食することが問題となっている. 本研究では, フッ素含有環境における純チタン, Ti-6Al-4V, Ti-6Al-7Nb合金および新しく試作したTi-(0.1~2.0)wt%Pt (またはPd) 合金の腐食挙動を動電位分極測定, 腐食電位測定によって検討した. また試験溶液に浸漬する前と後の試料表面のSEM観察を行った. 試験溶液として0.1%および0.2%NaF (それぞれ453および905ppmのフッ素濃度に対応) を含有する人工唾液と溶存酸素濃度が低い人工唾液を用いた. フッ素を含有する酸性環境 (pH 4.0) では, 純チタン, Ti-6Al-4V, Ti-6Al-7Nb合金の試料表面は腐食によって顕著に粗造になったが, Ti-Pt (またはPd) 合金はほとんど影響を受けなかった. 溶存酸素濃度が低い環境では, 市販のハミガキ剤に含まれるフッ素濃度 (フッ素濃度として約1,000ppm) では, Ti-Pt (またはPd) 合金は腐食の影響を全く受けなかったが, 純チタン, Ti-6Al-4V, Ti-6Al-7Nb合金は微視的な腐食によるダメージを受けた. Ti-0.5wt%Pt (またはPd) 合金は, フッ素含有環境でも腐食しない高耐食性を有する新しい歯科用チタン合金として応用が期待される

著者

藤田 敏雄

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.43, no.9, pp.511-519, 1994-09-15 (Released:2009-11-25)

参考文献数

11

被引用文献数

2 1

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In general, a volatile corrosion inhibitor is the liquid or the solid reagent as the compound or the several mixture which is vaporized (sublimated) slowly at the normal temperature.The resulting vaporized gas has the corrosion inhibiting reaction by the chemical or physical adsorption on metal surface.In Japan, the material with this volatile corrosion inhibitor which is coated on the material, or impregnated into, or extruded into paper or film, is referred to as the “volatile corrosion inhibiting paper” or the “volatile corrosion inhibiting film” respectively, and in which this one is dissolved referred to as the “volatile corrosion inhibiting oil”.We give a general name to above inhibitors referred to as the “volatile corrosion inhibiting material”.This report comments on the summary of kind, standard, nature, property, use and application method and the future trend of these materials.

著者

丸山 俊夫

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.45, no.8, pp.495-498, 1996-08-15 (Released:2009-11-25)

参考文献数

4

被引用文献数

1 1

著者

Gerald A. Trautenberg 荒牧 国次

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.8, pp.367-370, 1964-08-15 (Released:2009-11-25)

参考文献数

33

著者

田部 善一

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.43, no.8, pp.456-457, 1994-08-15 (Released:2009-11-25)

参考文献数

10

著者

高須 芳雄 松田 好晴

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.31, no.3, pp.148-155, 1982-03-15 (Released:2009-10-30)

参考文献数

26

被引用文献数

1 1

---

Oxidation behaviors of Fe, Co, Ni, Cu, and four Ni-Cu alloys (81, 64, 42, and 21% Ni) have been studied in 10 Torr (exceptionally, 1×10-3 Torr) of NO at the elevated temperatures from 580-780°C. The oxidation behaviors of such metals and alloys have been examined also in O2 at the same pressures and temperatures for comparison. Various methods such as microgravimetry, X-ray diffractometry, X-ray photoelectron spectroscopy, Auger electron spectroscopy, and Ion micro analysis were adopted for this investigation. The results obtained are summarized as follows: (1) The oxidation of Fe and Co in NO obeyed the cubic and the parabolic rate laws, respectively; while those of Ni and Cu obeyed the linear rate law. The oxidation characteristics (rate, rate law, or activation energy) of these metals in NO were much different from those in O2. (2) Nickel was rapidly oxidized in NO accompanied with the expansion of samples which was caused by the preferential oxidation of grain boundary. (3) The oxidation of Cu in NO was rate-determined by the dissociation of NO on the oxide surface. (4) The oxide formed on Fe, Co, Ni, and Cu in NO were Fe3O4, CoO, NiO, and Cu2O, respectively; while in O2 were Fe3O4 and Fe2O3, CoO, NiO, and Cu2O, respectively. (5) In the oxidation of Ni-Cu alloy system in NO, an accelerating oxidation was observed for Ni-rich alloys. The total amount of oxygen uptake of the Ni-rich alloy was greater than those of the Cu-rich alloys after the accelerating oxidation in NO occurred. (6) The selective oxidation characteristics for Ni-Cu alloy system during the oxidation in NO was also different from those in O2. In the former case, preferential oxidation of Ni occurred, resulting in the formation of NiO-rich oxide layer on the alloy. For the Ni-rich alloy and copper was scarcely oxidized forming only a small amount of Cu2O in the outer layer. As has generally been reported, the oxide film on Ni-Cu alloy formed in O2 consisted of two distinct layers; i. e. the component of the outer layer was copper oxide (mainly CuO) and the inner was NiO.

著者

金 栄吉

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.35, no.7, pp.413-420, 1986-07-15 (Released:2009-10-30)

参考文献数

7

被引用文献数

2 1

著者

松橋 亮 安保 秀雄 阿部 征三郎 紀平 寛

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.9, pp.578-585, 1987-09-15 (Released:2009-10-30)

参考文献数

7

被引用文献数

5 7

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The mechanism of corrosion of stainless steels in highly concentrated sulfuric acid was studied by the electrochemical method and surface analysis as EPMA and Laser-Raman Spectroscopy. Cyclic potential changes occured in this system about between -0.2V (SCE) (active state) and 0.2V (SCE) (passive state). The anodic reaction was determined as the metal dissolution in both the active and the passive state. The cathodic reaction in the active state near -0.2V (SCE) was mainly dominated by the reduction of hydrogen ion which was clearly indicated by the evolution of hydrogen gas. On the other hand, catholic reaction at the passive state about 0.2V (SCE) was determined as the reduction of molecular sulfuric acid resulting in the formation of sulfur and water. By the analysis of EPMA, precipitated sulfur was found on the specimen surface polarized at 0.2V (SCE) potentiostatically. The in-situ observation of corroding surface by Laser-Raman spectroscopy indicated the formation of precipitated sulfur on the metal surface at the corrosion potential. Cyclic changes in corrosion potentials were considered due to the following mechanisms; dissolved metal ion at the active state formed metal sulfate films on the metal surface, leading the corrosion potential to the passive state. Inversely at the passive state, water as the product of the cathodic reaction accelerated the dissolution of the metal sulfate film to move the corrosion potential to the active state.

著者

丸山 俊夫

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.44, no.7, pp.416-417, 1995-07-15 (Released:2009-11-25)

参考文献数

4

被引用文献数

1 1

著者

小口 八郎

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.32, no.2, pp.104-113, 1983-02-15 (Released:2009-10-30)

参考文献数

25

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Materials and techniques used in Japanese traditional metal arts and crafts were examined from the standpoint of modern science. Surface finishings reviewed are;(1) Polishing, (2) Roughening or Patterning of metal surface, (3) Fire-gilding with gold amalgam, (4) Coloring.It is concluded that Japanese traditional techniques in metals arts are excellent in ornamenting the metal articles and even suggest some ideas that are applicable to modern technology.

著者

本間 禎一

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.25, no.4, pp.251-265, 1976-04-15 (Released:2009-10-30)

参考文献数

62

被引用文献数

13 3

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This review makes a survey on that the behaviors and the mechanisms proposed of both the stress generation in oxide films and the plastic deformations of oxides at high temperatures, and discusses a role of the mechanical properties of the oxide films in the oxidation of metals. It suggests that the kinetic studies of some oxidation reactions need to be examined again with the mechanical properties of the oxide included in the considerations.

著者

遠藤 一彦 松田 浩一 安彦 善裕 大野 弘機 賀来 亨

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.46, no.11, pp.682-690, 1997-11-15 (Released:2009-11-25)

参考文献数

80

被引用文献数

5 5

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Metallic surgical implants have been widely used in orthopedics and dentistry. This paper reviews the biodegradation of metallic implants and its local and systemic effects on patients. The review discusses typical damage of 316L stainless steel, Co-Cr alloy, commercially pure Ti, and Ti-based alloy implants due to corrosion and wear and factors affecting the biodegradation of these implants. Macrophage mediation of cellular and humoral regulatory pathways in inflammatory and immune responses to metallic ions and wear debris released from the implant is summarized. Implant-related factors influencing the susceptibility to local infection are also discussed.

著者

杉本 克久

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.48, no.11, pp.673-680, 1999-11-15 (Released:2009-11-25)

参考文献数

30

被引用文献数

8 8

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Electrochemical Impedance Spectroscopy (EIS) has been known as a powerful tool for analyzing electrode reaction mechanism. In this review the history of EIS, the definition of electrochemical impedance, the general concept of transfer function, and the measurement method of electrochemical impedance using a transfer function analyzer are first introduced. Then, analytical methods of impedance spectra using electrical equivalent circuits and the kinetic theory of electrochemical reactions are stated. Finally, the future scope of EIS is briefly given.

著者

細矢 雄司 篠原 正 押川 渡 元田 慎一

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.54, no.8, pp.391-395, 2005-08-15 (Released:2011-12-15)

参考文献数

13

被引用文献数

6 17

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炭素鋼の大気腐食における環境の腐食性について, 付着海塩が吸水することによって表面に形成される水膜の厚さの影響を中心に検討した.付着海塩への吸着水量を種々の条件下で実測し, 形成された液膜の濃度を計算値と比較して熱力学計算が実験結果をよく再現する条件を得た. また種々の条件下で炭素鋼の腐食試験を行い, 熱力学計算で導出される水膜の厚さdと腐食速度CRとの関係について調べた. d=50μm近傍においてCRは最大値約0.07mgm-2s-1を取ることを見い出した.

著者

石川 達雄

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.46, no.7, pp.411-417, 1997-07-15 (Released:2009-11-25)

参考文献数

30

被引用文献数

1 4

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The formation mechanism of ferric oxide hydroxides, α-, β- and γ-FeOOH, is described in view of evolution of colloidal particles in aqueous solutions. The surface characterization of FeOOH particles by IR spectroscopy is cited. Finally, the adsorption interaction of H2O, SO2 and NO with the particles is explained based on their surface structures.

著者

岩田 誠一

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.40, no.5, pp.336-342, 1991-05-15 (Released:2009-11-25)

参考文献数

19

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Various problems concerning corrosion in ULSI (Ultra-large-scale Integration)'s are discussed. After a brief discussion on Al-line corrosion in plastic packages, two problems connected with ULSI manufacturing are explained and discussed. One is the selection of heat treatment atmosphere which does not oxidize tungsten gate electrodes, but can oxidize silicon at the same time. The other is the high-temperature stability of thin SiO2 films in refractory metal/SiO2/Si structures. Namely, the degradation of SiO2 occurs by H2 atmosphere and by the reaction between SiO2 and Si.

著者

田中 良平

出版者

Japan Society of Corrosion Engineering

雑誌

防食技術 (ISSN:00109355)

巻号頁・発行日

vol.25, no.4, pp.233-250, 1976-04-15 (Released:2009-10-30)

参考文献数

89

被引用文献数

3

著者

川原 雄三

出版者

Japan Society of Corrosion Engineering

雑誌

Zairyo-to-Kankyo (ISSN:09170480)

巻号頁・発行日

vol.54, no.5, pp.183-194, 2005

被引用文献数

11

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廃棄物発電プラントでは高効率, 低公害, メンテナンスフリーなどの性能向上を図る上で構成材料の高温腐食防止技術が鍵となっている. ごみの高カロリー化, 環境規制強化などの社会情勢変化に応じて腐食環境が過酷化し, 燃焼改善, 最適設計などによる腐食性の軽減がなされてきた. さらに, ボイラ蒸発管を主体に金属溶射, 溶接肉盛などの耐食コーティングを用いた寿命向上技術が開発, 適用され, また, 過熱器においても310系ステンレス鋼, 高Cr高Mo・Niベース合金管の利用と腐食メカニズムの解明により, 現在では673K/3.9MPaを超える蒸気条件が可能となっている. 本解説ではおよそ30年にわたる廃棄物発電プラントの腐食防止および耐食材料に関連した主な実用技術の開発と今後の課題について説明する.