Characterization of Hydroxyapatite Coating on 316L Stainless Steel by Sol–Gel Technique

  • Sarbjit KaurEmail author
  • Niraj BalaEmail author
  • Charu KhoslaEmail author


Biomaterials are used for developing implants and producing a part or facilitating a function of a human body in a safe, reliable, and economical manner. Sol–gel deposition is one of the best, simple and economical methods of surface modification. In the current work, hydroxyapatite Ca10(PO4)6(OH)2, a bioactive material, has been prepared and then deposited on 316L stainless steel by the sol-gel coating method. The porosity percentage of hydroxyapatite coating was found to be 0.22. Electrochemical corrosion testing was carried out for both uncoated and sol-gel coated specimens. The coated specimens were characterized by the X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, and cross-sectional analysis. The results revealed that the Ca/P ratio of the sol-gel coated steel was closer to that of a real human bone. It was found that hydroxyapatite-coated samples show better corrosion resistance and better implant properties as compared to those of the uncoated 316L stainless steel.


biomaterials bioactive electrochemical hydroxyapatite sol-gel 



Authors express their earnest thanks to Dr. Harpreet Singh, Professor at the School of Mechanical, Materials and Energy Engineering, Indian Institute of Technology, Roopnagar (Punjab) and Metallizing equipment Industry, Jodhpur for their kind co-operation during this research work. Authors would also like to thank IKGPTU Kapurthala for providing access to papers and journals required for this research.


The authors declare that they have no conflict of interest.


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Copyright information

© Allerton Press, Inc. 2019

Authors and Affiliations

  1. 1.IKGPTUKapurthalaIndia
  2. 2.Mechanical Engineering Department BBSBECFatehgarh SahibIndia
  3. 3.CUIET, Chitkara UniversityPunjabIndia

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