TY - GEN
T1 - Corrosion resistance study of electrophoretic deposited hydroxyapatite on stainless steel for implant applications
AU - Chew, Kean Khoon
AU - Zein, Sharif Hussein Sharif
AU - Ahmad, Abdul Latif
AU - McPhail, David S.
AU - Boccaccini, Aldo R.
PY - 2012
Y1 - 2012
N2 - Stainless steel (SS) is often used for orthopaedic and dental implants because of its excellent mechanical characteristics. However, from an electrochemical perspective, SS can be susceptible to corrosion-related problems. Inorganic bioactive coatings on SS surfaces are reported to impart corrosion resistance and enhance biocompatibility. In this paper, hydroxyapatite (HA) coatings were developed on SS 316L by an electrophoretic deposition (EPD) technique at applied deposition voltages from 10 to 60 V in an acidic aqueous solution. The present study was performed to optimise the applied voltage required to produce stable HA coatings on SS 316L. Their corrosion resistance in simulated body conditions were investigated using the potentiodynamic polarization curves. The results of the electrochemical studies revealed that the optimal applied voltage for EPD of HA on SS 316L was 40 V. The polarisation parameters, such as the corrosion potential, breakdown potential and repassivation potential of HA coated materials demonstrated nobler behaviours than the uncoated SS 316L. These results validated the successful formation of stable and protective HA coatings on SS 316L.
AB - Stainless steel (SS) is often used for orthopaedic and dental implants because of its excellent mechanical characteristics. However, from an electrochemical perspective, SS can be susceptible to corrosion-related problems. Inorganic bioactive coatings on SS surfaces are reported to impart corrosion resistance and enhance biocompatibility. In this paper, hydroxyapatite (HA) coatings were developed on SS 316L by an electrophoretic deposition (EPD) technique at applied deposition voltages from 10 to 60 V in an acidic aqueous solution. The present study was performed to optimise the applied voltage required to produce stable HA coatings on SS 316L. Their corrosion resistance in simulated body conditions were investigated using the potentiodynamic polarization curves. The results of the electrochemical studies revealed that the optimal applied voltage for EPD of HA on SS 316L was 40 V. The polarisation parameters, such as the corrosion potential, breakdown potential and repassivation potential of HA coated materials demonstrated nobler behaviours than the uncoated SS 316L. These results validated the successful formation of stable and protective HA coatings on SS 316L.
UR - http://www.scopus.com/inward/record.url?scp=84859056792&partnerID=8YFLogxK
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U2 - 10.4028/www.scientific.net/KEM.507.141
DO - 10.4028/www.scientific.net/KEM.507.141
M3 - Conference contribution
AN - SCOPUS:84859056792
SN - 9783037853795
T3 - Key Engineering Materials
SP - 141
EP - 146
BT - Electrophoretic Deposition
PB - Trans Tech Publications Ltd
T2 - 4th International Conference on Electrophoretic Deposition: Fundamentals and Applications
Y2 - 2 October 2011 through 7 October 2011
ER -