2022 Fiscal Year Final Research Report

Proposal of a Method to Easily Peel at the Target Interface in Multi-layer Painting Applying Atmospheric Pressure Plasma

Research Project

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Project/Area Number	20K04944
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 24020:Marine engineering-related
Research Institution	National Institute of Technology(KOSEN), Oshima College
Principal Investigator	Nakamura Tsubasa 大島商船高等専門学校, 電子機械工学科, 准教授 (10390501)
Co-Investigator(Kenkyū-buntansha)	上野崇寿大分工業高等専門学校, 電気電子工学科, 准教授 (30508867) 竹下慎二和歌山工業高等専門学校, 電気情報工学科, 准教授 (30616800) 稲垣歩大分工業高等専門学校, 機械工学科, 准教授 (50633400) 浅地豊久新居浜工業高等専門学校, 機械工学科, 教授 (70574565) 太田孝雄奈良工業高等専門学校, 機械工学科, 准教授 (80353267)
Project Period (FY)	2020-04-01 – 2023-03-31
Keywords	大気圧プラズマ / ストリーマ / 任意界面での塗装剥離 / 熱応力 / 残留応力 / ZVS電源回路
Outline of Final Research Achievements	In multi-layer painting such as ship painting, peeling at optional interface is desirable in consideration of the repainting process. Therefore, this research was carried out with the goal of solving problems for the industrial application of this system. The mechanism that makes the paint easy to peel off was elucidated by measuring the internal stress of the paint using a 3-axis rosette gauge and by analytical simulation. No significant results were obtained for paint peel at optional interfaces in multi-layer painting. However, we were able to show the possibility of easily peeling at arbitrary interfaces by adjusting the atmospheric pressure plasma irradiation parameters. Finally, a Zero Voltage Switching (ZVS) power supply circuit with a 12 V DC power supply as input developed for solve productivity issues in industrial applications. This enabled power supply to be secured by a large-capacity mobile battery.
Free Research Field	プラズマ応用
Academic Significance and Societal Importance of the Research Achievements	産業応用した際の生産性を解決し，プラズマを応用した新たな塗装剥離手法を提案・実用化された際には，従来の塗装剥離に用いられているサンドブラスト法による船舶母材（鋼板）の減肉を防ぐことができ，また再塗装の際の凹凸も少なくすることができる。これにより，船舶表面を可能な限り平滑化することができ，船舶の航行時の推進抵抗を少なくすることができる。併せて，国連の17の持続可能な開発目標（SDGs）である， (7) エネルギー効率の改善率向上，ならびに(14) 海洋・海洋資源の保全の一助となる。