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- Enami Yoshihide
- Faculty of Science and Engineering, Aoyama Gakuin Univ.
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- Takemoto Mikio
- Faculty of Science and Engineering, Aoyama Gakuin Univ.
Bibliographic Information
- Other Title
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- 耐食機能附与のための溶射ニッケルクロム層のレーザー処理
- タイショク キノウ フヨ ノ タメ ノ ヨウシャ ニッケル クロムソウ ノ レ
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Abstract
In order to endow the sprayed 80wt%Ni-20%Cr coat with a high anti-corrosion performance, infrared laser remelting was done utilizing a beam scanning and rotating disk method. Both the improvement of anti-corrosion performance of laser treated Ni-Cr coat, and the problems in laser surface modification are introduced. The results obtained are summarized as follows: (1) As-sprayed Ni-Cr coat contains a number of Cr-oxide and pores in it, and allows the corrosive environment quickly impregnate into the substrate metal as long as the sealing of pores is not successfully completed. (2) The Ni-Cr coat fully remelted and strongly bonded to the substrate by beam scanning method was inevitably diluted by the iron diffused from the substrate. Defect-free Ni-Cr coat with iron concentration less than 20wt% could be obtained by very limited laser irradiation condition, and showed anti-corrosion performance against relatively mild environment. (3) Rotating disk method made it possible to refuse the surface thin layer of sprayed Ni-Cr coat, and prevented the iron from diffusing into refused layer. The specimen treated by this method showed an excellent anti-corrosion performance against severe molton salt oxidation. Laser irradiation under highly controlled condition is necessary for remelting the surface thin layer of sprayed coat.
Journal
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- CORROSION ENGINEERING
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CORROSION ENGINEERING 39 (8), 416-424, 1990
Japan Society of Corrosion Engineering
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Keywords
Details 詳細情報について
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- CRID
- 1390001206257693568
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- NII Article ID
- 130006025339
- 130004732190
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- NII Book ID
- AN00225595
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- ISSN
- 18841155
- 00109355
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- NDL BIB ID
- 3681738
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed