Effect of added ethanol in ethylene glycol–NaCl electrolyte on titanium electropolishing

•We developed the electropolishing method for titanium using an environmentally friendly electrolyte.•The electrolyte solution was mixed ethylene glycol–NaCl–ethanol.•XPS and AFM analyses were performed for electropolished surface.•A mirror-like surface of titanium was successfully obtained when add...

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Bibliographic Details
Published inCorrosion science Vol. 98; pp. 494 - 499
Main Authors Kim, Donghyun, Son, Kyungsik, Sung, Dahye, Kim, Yonghwan, Chung, Wonsub
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.09.2015
Subjects
A. Titanium
B. AFM
B. Potentiostatic
B. XPS
C. Anodic dissolution
B. XPS
B. Potentiostatic
B. AFM
C. Anodic dissolution
A. Titanium
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Summary:•We developed the electropolishing method for titanium using an environmentally friendly electrolyte.•The electrolyte solution was mixed ethylene glycol–NaCl–ethanol.•XPS and AFM analyses were performed for electropolished surface.•A mirror-like surface of titanium was successfully obtained when adding 20vol.% ethanol. This study examined the effects of adding ethanol, a typical polar solvent, to an ethylene glycol–NaCl electrolyte solution used for Ti electropolishing. The electropolishing range was determined by measuring current density–voltage curve as a function of the ethanol concentration. When 20vol.% ethanol was added to the electrolyte solution, a mirror-like surface was obtained by adjusting the TiCl4 layer from the substrate. With the exception of oxygen-bonded species, only metallic Ti was detected on the electropolished surface with X-ray photoelectron spectroscopy. The minimum surface roughness, which was measured with atomic force spectroscopy, was 2.341nm.
ISSN:0010-938X
1879-0496
DOI:10.1016/j.corsci.2015.05.057