Improvement of corrosion resistance and investigation of hardening mechanism for S-phase of a sprayed stainless steel coating

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420747
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: Osaka Research Institute of Industrial Science and Technology
• Principal Investigator: ADACHI Shinichiro 地方独立行政法人大阪府立産業技術総合研究所, その他部局等, 研究員 (50359410)
• Co-Investigator(Kenkyū-buntansha): UEDA Nobuhiro 大阪府立産業技術総合研究所, 主任研究員 (90359365)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: コールドスプレー / 低温プラズマ窒化 / 低温プラズマ浸炭 / オーステナイト系ステンレス鋼 / 耐腐食性 / 耐摩耗性

Outline of Final Research Achievements

We examined plasma nitriding and carburizing at temperatures below 450℃ for cold sprayed SUS 316L austenitic stainless steel coatings to enhance corrosion and wear resistance, by forming expanded austenite (known as S-phase), that is dissolved excess nitrogen or carbon in the austenite lattice. The cold sprayed SUS316L coatings could be hardened by the formation of S-phase due to the presence of strong strain. The cold sprayed SUS316L coatings included little oxide differing from conventional thermal spray coatings, moreover the S-phase has superior corrosion resistance to restrict pitting corrosion in NaCl solution.

Free Research Field

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