Evaluation of corrosion resistance of Co-Cr alloys fabricated with different metal laser sintering systems


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TUNA S. H., KARACA E., Aslan I., Pekkan G., Pekmez N.

Journal of Advanced Prosthodontics, cilt.12, sa.3, ss.114-123, 2020 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 3
  • Basım Tarihi: 2020
  • Doi Numarası: 10.4047/jap.2020.12.3.114
  • Dergi Adı: Journal of Advanced Prosthodontics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.114-123
  • Anahtar Kelimeler: Co-Cr alloy, Corrosion, Metal laser sintering Powder, PHOSPHATE REINFORCED COCRMO, IN-VITRO BIOCOMPATIBILITY, DENTAL CASTING ALLOYS, MECHANICAL-PROPERTIES, MICROSTRUCTURE, RELEASE, COBALT, MO, CHROMIUM, BEHAVIOR
  • Hacettepe Üniversitesi Adresli: Evet

Özet

© 2020 The Korean Academy of Prosthodontics.PURPOSE. The aim of this study was to evaluate the corrosion resistance of the specimens produced by five different commercial metal laser sintering (MLS) systems with their recommended Co-Cr alloy powders. MATERIALS AND METHODS. The MLS machines and the alloy powders used were, ProX 100-ST2724G (St-Pro), Mysint 100-EOS SP2 (SP2-Mys), EOSINT 270-EOS SP2 (SP2-EOS), SLM 100-Starbond CoS (SB-SLM), and MLab Cusing-Remanium® Star (RS-MLab), respectively. Eight specimens from each group were prepared. Open circuit potential (Eocp) and electrochemical impedance spectroscopy (EIS) measurements of polished surfaces of the specimens were conducted in a three-electrode cell using a potentiostat-galvanostat in Fusayama-Meyer artificial saliva (AS). Specimens from each group were immersed in AS and de-ionized water for seven days. Eocp, charge transfer resistance (Rct) values, and released ions (μg/cm2 x 7d) in different solutions were determined. The specimen surfaces were observed with SEM/EDS. Results were analyzed statistically. RESULTS. Eocp values have shifted to potentials that are more positive over time. Steady-state Eocp values were from high to low as follows, SB-SLM, SP2-Mys, SP2-EOS, RS-MLab, and ST-Pro, respectively. After 60 mins, RS-MLab specimens had the highest Rct value, followed by SP2-Mys, SB-SLM, SP2-EOS, and ST-Pro. In all groups, ion release was higher in AS than that in de-ionized water. CONCLUSION. There were small differences among the corrosion resistances of the Co-Cr alloy specimens produced with MLS systems; meanwhile, the corrosion resistances were quite high for all specimens.