불소 첨가/미첨가 인공타액 용액에서 연마 및 마스킹 조건이 적층제조 Ti-6Al-4V 합금의 동전위분극시험 결과에 미치는 영향
Effects of Grinding and Masking Conditions on the Potentiodynamic Polarization Curves of Additively Manufactured Ti-6Al-4V Alloy in Artificial Saliva Solution with or Without Fluoride Ions
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Additively manufactured titanium alloy is one of the promising materials in advanced medical industries. However, these additively manufactured alloys show corrosion properties different from those of conventionalmaterials due to their unique microstructure. In this study, the effect of surface roughness and maskingconditions on the results of the potentiodynamic polarization tests on additively manufactured orconventional Ti-6Al-4V alloys in artificial saliva solution with or without fluoride was investigated. Theresults showed that the corrosion potential was slightly lower with a flat cell with an O-ring than withmasking tape. The corrosion rate was decreased with decreases in the surface roughness. Localized corrosioninvolving delamination of the surface layer occurred at 7 ~ 9 V (SSC) on the additively manufacturedalloy in solution with or without fluoride when the samples were finished with 1000-grit SiC paper,whereas localized corrosion was not observed in the specimens finished with 1-μm alumina paste.
Abstract
Additively manufactured titanium alloy is one of the promising materials in advanced medical industries. However, these additively manufactured alloys show corrosion properties different from those of conventionalmaterials due to their unique microstructure. In this study, the effect of surface roughness and maskingconditions on the results of the potentiodynamic polarization tests on additively manufactured orconventional Ti-6Al-4V alloys in artificial saliva solution with or without fluoride was investigated. Theresults showed that the corrosion potential was slightly lower with a flat cell with an O-ring than withmasking tape. The corrosion rate was decreased with decreases in the surface roughness. Localized corrosioninvolving delamination of the surface layer occurred at 7 ~ 9 V (SSC) on the additively manufacturedalloy in solution with or without fluoride when the samples were finished with 1000-grit SiC paper,whereas localized corrosion was not observed in the specimens finished with 1-μm alumina paste.
참고문헌 (11)
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