Electrochemical corrosion behavior of laser gas nitrided layer on the NiTi shape memory alloy in Hank's solution

Song Zhang, Hujiao Tang, Fang Hu, Chunhua Zhang, Hau Chung Man, Qiaoqian Zhang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A nitrided layer was formed on the NiTi shape memory alloy (SMA) after being irradiated by a continuous wave Nd-YAG laser in a N2environment. With optimum process parameters, a compact laser modified gradient layer reinforced with fine TiN particles was achieved. Electrochemical measurements of the laser gas nitrided layer on the NiTi SMA showed that the corrosion potential and the breakdown potential were increased while the corrosion current was decreased as compared with the untreated the NiTi SMA. The polarization resistance of the laser gas nitrided layer on the NiTi SMA was increased significantly while the capacitance was decreased. Based on the EIS spectra, a simple model and an equivalent circuit were proposed to describe the electrode-electrolyte interfaces.
Original languageEnglish
Title of host publicationMaterials and Manufacturing
Pages179-182
Number of pages4
DOIs
Publication statusPublished - 30 Aug 2011
EventInternational Conference on Material and Manufacturing, ICMM 2011 - Jinzhou, Liaoning, China
Duration: 7 Sep 20119 Sep 2011

Publication series

NameAdvanced Materials Research
Volume299-300
ISSN (Print)1022-6680

Conference

ConferenceInternational Conference on Material and Manufacturing, ICMM 2011
CountryChina
CityJinzhou, Liaoning
Period7/09/119/09/11

Keywords

  • Electrochemical corrosion
  • Electrochemical impedance spectroscopy (EIS)
  • Laser gas nitriding (LGN)
  • NiTi shape memory alloy

ASJC Scopus subject areas

  • Engineering(all)

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