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Related Experiment Videos

Surface properties of electrochemically buffed titanium casting.

Seigo Okawa1, Awlad Hossain, Mitsugu Kanatani

  • 1Division of Dental Biomaterial Science, Niigata University Graduate School of Medical and Dental Sciences, Gakkoucho-dori 2-5274, Niigata 951-8514, Japan. sokawa@dent.niigata-u.ac.jp

Dental Materials Journal
|February 4, 2005
PubMed
Summary

Electrochemical buffing improved titanium casting surfaces. Higher potentials resulted in a mirror finish and gold color, with reduced roughness and enhanced chemical cleanliness.

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Electrochemistry

Background:

  • Titanium castings require advanced surface finishing techniques.
  • Electrochemical buffing combines mechanical and electrochemical methods for surface treatment.

Purpose of the Study:

  • To investigate the effects of electrochemical buffing on titanium casting surfaces.
  • To evaluate surface roughness, hardness, color, and cleanness under varying potentials.

Main Methods:

  • Electrochemical buffing applied to titanium casting using alpha-Al2O3 suspension and KNO3 solution.
  • Potentials ranged from 0 V (Mechanical Electrochemical Polishing - MEP) to 10 V (Electrochemical Buffing - ECB10).
  • Surface properties including roughness, hardness, color, and cleanness were analyzed.

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Main Results:

  • ECB10 treatment yielded a mirror finish with a gold color, reducing surface roughness to one-quarter of MEP.
  • MEP surfaces showed significant aluminum presence, indicating chemical reactions with the abrasive material.
  • Higher potentials led to anodic dissolution of reaction products, improving surface chemical cleanliness and OH- enrichment.

Conclusions:

  • Electrochemical buffing is effective for achieving superior surface finishes on titanium castings.
  • Optimizing potential is crucial for controlling surface chemistry and achieving desired aesthetic and functional properties.
  • The process offers a method for both mechanical polishing and controlled chemical surface modification.