Print ISSN: 1681-6900

Online ISSN: 2412-0758

Author : Alawi kadhim, Nabeel


Hydroxyapatite Coating Improved Corrosion Resistance of 316L Stainless Steel Used For Surgical Implants Applications

sami Abualnoun Ajeel; Nabeel Alawi kadhim

Engineering and Technology Journal, 2008, Volume 26, Issue 8, Pages 958-970

Incidences of failure of stainless steel implant devices reveal the occurrence of
significant localized corroding pitting and crevice corrosion. To reduce corrosion and
achieve better biocompatibility, the alloy of stainless steel was coated by hydroxapatite
(HAP) by electrphoretic depositing method.
The study involves modified surface of 316L stainless steel by coating it with
hydroxyapatite by electrophoretic deposition. The method was carried out in various time
intervals (from 1 to 5 minutes) at constant potential of 60 V. The electrochemical behavior
of 316L stainless steel (uncoated and HAP coated specimens) was studied in simulated
human body environment. Synthetic blood plasma was utilized for simulated body fluid
conditions.
The corrosion parameters obtained from open circuit potential and potentiadynamic
polarization for the specimens indicate nobler shift in the polarization parameters, OCPtime,
corrosion potential (Err) and corrosion current density (Icorr), for all coated specimens
in comparison with the uncoated specimen. The final corrosion results for the alloy indicated
that the specimen coated for 3 minutes was found to be more noble and have optimum
corrosion properties compared with the other coated specimens.