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Method of surface preparation of NiTi by electropolishing

Publish place: 7th International Conference on Materials and Metallurgical Engineering (iMat 2018)
Publish Year: 1397
Type: Conference paper
Language: English
View: 560

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Link to this Paper:
https://civilica.com/doc/842071

Document National Code:

IMES12_313

Index date: 1 May 2019

Method of surface preparation of NiTi by electropolishing abstract

The electropolishing process of NiTi was performed on raw samples. Besides that, the effect ofelectro polishing bath and also the operation condition of the process on the quality of surfaceand electro polishing rate were established. Anodic polarizations of NiTi up to wereperformed in various H2SO4 and HCl concentrations in methanolic solutions. The passivity couldbe overcome in methanolic solution with concentration of more than molL-1 of H2SO4. Thedissolution kinetics were studied in dependence of the polarization potential, the H2SO4 and HClconcentration and temperature effect. Studies on the influence of the temperature on the electropolishing process show that the higher the temperature is, the higher the electro polishing rate.The best result was obtained with molL-1 methanolic H2SO4 acid and molL-1 at 298 whichcan yield an electropolish current of 0.011 A/cm-2 at potential of V. Finally, the surface, aswell as current efficiency, showed an optimum under these conditions.

Method of surface preparation of NiTi by electropolishing Keywords:

Electro polishing , NiTi , Methanolic H2SO4 and HCl

Method of surface preparation of NiTi by electropolishing authors

Erfan Asghari Fesaghandis

BSc student of Tabriz University, Department of Materials Engineering- Department of Materials Engineering, University of Tabriz, Tabriz, Iran

Ayda Asaadi Zahraei

MSc student of K.N.Toosi University of technology, Faculty of Materials Science andEngineering- Department of Materials Engineering, University of Tabriz, Tabriz, Iran

Homa Homaei

BSc student of Tabriz University, Department of Materials Engineering- Department of Materials Engineering, University of Tabriz, Tabriz, Iran

Hossein Aghajani

Associate Professor of Tabriz University, Department of Materials Engineering- Department of Materials Engineering, University of Tabriz, Tabriz, Iran