Presentation Title

Electrochemical characterization of a titanium alloy – effect of pH

Faculty Mentor

Ravi A Vilupanur

Start Date

17-11-2018 8:30 AM

End Date

17-11-2018 10:30 AM

Location

HARBESON 18

Session

POSTER 1

Type of Presentation

Poster

Subject Area

engineering_computer_science

Abstract

Titanium and titanium alloys are widely used as implants in the human body. This is because of their advantageous mechanical properties, corrosion resistance and biocompatibility. The alloy that is most commonly used is Ti-6Al-4V which is a titanium-based material containing 6 mass % of aluminum and 4 mass % of vanadium with the rest (90 mass %) comprised of titanium. Although this alloy has been in use for a while, it is important to understand their stability in the body because of the increasingly longer life expectancies of the population as a whole. A problem of importance is the discharge of metal particles into the tissue encompassing the implant, which can cause adverse reactions in the body. It is well known that the pH in the vicinity of an implant can vary quite dramatically during and immediately after surgery. These shifts in pH can cause a local increase in the rate of corrosion. The goal of this study was to investigate the impact of three different pH levels on the corrosion behavior of Ti-6Al-4V in a phosphate buffered saline solution utilizing electrochemical methods. Electrochemical tests were carried on Ti-6Al-4V alloys in phosphate buffered saline maintained at three different pH conditions. Three replicates for each pH condition were tested. Based on the results of these electrochemical tests, we found that the material was more noble at neutral pH relative to the acidic or basic pH values and that the corrosion rate (as represented by the corrosion current) was highest in the neutral solution.

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Nov 17th, 8:30 AM Nov 17th, 10:30 AM

Electrochemical characterization of a titanium alloy – effect of pH

HARBESON 18

Titanium and titanium alloys are widely used as implants in the human body. This is because of their advantageous mechanical properties, corrosion resistance and biocompatibility. The alloy that is most commonly used is Ti-6Al-4V which is a titanium-based material containing 6 mass % of aluminum and 4 mass % of vanadium with the rest (90 mass %) comprised of titanium. Although this alloy has been in use for a while, it is important to understand their stability in the body because of the increasingly longer life expectancies of the population as a whole. A problem of importance is the discharge of metal particles into the tissue encompassing the implant, which can cause adverse reactions in the body. It is well known that the pH in the vicinity of an implant can vary quite dramatically during and immediately after surgery. These shifts in pH can cause a local increase in the rate of corrosion. The goal of this study was to investigate the impact of three different pH levels on the corrosion behavior of Ti-6Al-4V in a phosphate buffered saline solution utilizing electrochemical methods. Electrochemical tests were carried on Ti-6Al-4V alloys in phosphate buffered saline maintained at three different pH conditions. Three replicates for each pH condition were tested. Based on the results of these electrochemical tests, we found that the material was more noble at neutral pH relative to the acidic or basic pH values and that the corrosion rate (as represented by the corrosion current) was highest in the neutral solution.