Abstract
In this study various schemes of chemical pretreatment with NaOH, HF, or H 2O 2 are used to form bioactive hydroxyapatite (HA) coatings by a thermal substrate method. Investigations were conducted to examine the properties of the coatings produced on untreated and chemically pretreated substrates as well as the bioactivity of HA coatings subjected to soaking with a simulated body fluid (SBF) for 7 days. The thermal substrate method has proved suitable for a fast formation of uniform coatings on titanium and Ti6Al4V substrates at low temperatures, with the chemical composition and film thickness being controlled. The chemical pretreatment is intended to improve the bioactivity of the coatings, their uniformity and adhesion to the substrate.
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