更新情報
第11回
Ni 基600 合金を対象とした腐食すきま再不動態化電位測定方法の検討
著者:
岩金 弘樹,Hiroki IWAKANE,関口 智大,Tomohiro SEKIGUCHI,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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Alloy600 CREV crevice corrosion ER repassivation potential
岩金 弘樹,Hiroki IWAKANE,関口 智大,Tomohiro SEKIGUCHI,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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Alloy600 CREV crevice corrosion ER repassivation potential
The method for determining the repassivation potential for corrosion crevice of stainless steel is defined by JIS, but that of Alloy600 is not defined yet. In this paper, the method for determining the repassivation potential was considered based on the experiments with Alloy600 of nuclear constituent material by reference to JIS and intended to contribute to the establishment of it. In preparation for measuring the repassivation potential, the pitting potential dependence of Cl- concentration is measu...
英字タイトル:
Study on the electrochemical method for determining the repassivation potential for corrosion crevice of Alloy600.
英字タイトル:
Study on the electrochemical method for determining the repassivation potential for corrosion crevice of Alloy600.
第11回
SUS304L 鋼の局部腐食発生条件および進展継続性評価
著者:
関口 智大,Tomohiro SEKIGUCHI,岩金 弘樹,Hiroki IWAKANE,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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austenitic stainless steel chloride ion crevice corrosion initiation condition repassivation condition
関口 智大,Tomohiro SEKIGUCHI,岩金 弘樹,Hiroki IWAKANE,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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austenitic stainless steel chloride ion crevice corrosion initiation condition repassivation condition
Crevice corrosion has been concerned in the Fukushima Daiichi Nuclear Power Station, since seawater was injected to make up water level as part of the emergency action. To evaluate structural integrity, it is important to inves tigate whether crevice corrosion occurred. The purpose of this study is to investigate conditions of crevice corrosion initiation and repassivation of SUS304L. SUS304L specimens with acrylic crevice were held at constant electr ochemical potentials in 1000ppm Cl- solution. It was in...
英字タイトル:
Evaluation of crevice corrosion initiation condition and repassivation condition of SUS304L
英字タイトル:
Evaluation of crevice corrosion initiation condition and repassivation condition of SUS304L
第13回
ステンレス鋼のすきま腐食生起及び進展停止臨界電位に及ぼす 非有害アニオン添加の影響
著者:
渡辺 駿,Shun WATANABE,関口 智大,Tomohiro SEKIGUCHI,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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crevice corrosion inhibitive anion initiation potential repassivation potential type 316L stainless steel
渡辺 駿,Shun WATANABE,関口 智大,Tomohiro SEKIGUCHI,阿部 博志,Hiroshi ABE,渡邉 豊,Yutaka WATANABE
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crevice corrosion inhibitive anion initiation potential repassivation potential type 316L stainless steel
Austenitic stainless steels are widely used as structural materials in many industries. However, stainless steels are susceptible to crevice corrosion in the solution including chloride ions. In this paper, at first, the most inhibitive anion against corrosion was investigated by anodic polarization measurement of type 316L stainless steel in the solution containing Cl- with candidate inhibitive anions (WO42-, MoO42-, VO3-). MoO42- was adopted as the most inhibitive anion in this study. Next, the effec...
英字タイトル:
Effect on critical potentials for crevice corrosion initiation and repassivation of stainless steel by addition of inhibitive anion
英字タイトル:
Effect on critical potentials for crevice corrosion initiation and repassivation of stainless steel by addition of inhibitive anion
第10回
塩化物イオン混入環境におけるすきま腐食抑制技術としての非有害アニオンの効果
著者:
関口 智大,Tomohiro SEKIGUCHI,渡邉 豊,Yutaka WATANABE
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chloride ion crevice corrosion critical chloride ion for crevice corrosion molybdate ion repassivation
関口 智大,Tomohiro SEKIGUCHI,渡邉 豊,Yutaka WATANABE
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chloride ion crevice corrosion critical chloride ion for crevice corrosion molybdate ion repassivation
When crevice corrosion occurs in Cl- containing solutions, Cl- concentration in the crevice increases by a few orders of magnitude due t o potential gradient. This is one of the reasons why localized corrosion takes place in a crevice. If there are non-aggressive anions ( such as MoO42-) coexist in the bulk with Cl-,it is expected that the non-aggressive anions migrate into the crevice competitively with C l- and it helps to improve the crevice environment. The purpose of this study is to investigate the e...
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Effects of non-aggressive anions as a mitigation measure to crevice corrosion in a chloride containing environment
英字タイトル:
Effects of non-aggressive anions as a mitigation measure to crevice corrosion in a chloride containing environment
第11回
核燃料再処理施設における溶接補修工法の開発
著者:
甲斐 喬,Takashi KAI,鴨 和彦,Kazuhiko KAMO,渡邉 智裕,Tomohiro WATANABE,加納 洋一,Yoichi KANO,高坂 充,Makoto KOSAKA
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Build-up Cover plate Heat box Nuclear fuel cycle Repair welding Reprocessing facility
甲斐 喬,Takashi KAI,鴨 和彦,Kazuhiko KAMO,渡邉 智裕,Tomohiro WATANABE,加納 洋一,Yoichi KANO,高坂 充,Makoto KOSAKA
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Build-up Cover plate Heat box Nuclear fuel cycle Repair welding Reprocessing facility
If leak trouble occurs at nuclear fuel reprocessing facility, repair welding procedure with short constructi on period is necessary to keep the safety of facility. As repair welding procedures, build-up welding proce dure and cover plate welding procedure have been developed. To get a good quality of repair welding joint wi thout lack of fusion and burn through into inside, heat box control is applied to these welding procedures....
英字タイトル:
Development of welding repair procedures for nuclear fuel reprocessing facility
英字タイトル:
Development of welding repair procedures for nuclear fuel reprocessing facility