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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2006

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Electrochemical formation of bioactive surface layer on titanium

Krasicka-Cydzik E., Kowalski K., Glazowska I.

Journal of Achievements in Materials and Manufacturing Engineering

2006

Vol. 18, nr 1-2

147--150

Purpose: Electrochemical oxidation method to form thin gel-like layer and activate titanium surface for calcium phosphate deposition Design/methodology/approach: Titanium was anodised galvanostatically with low current density from cathodic potential in 2 M H 3PO 4 solution up the steady state potential. This treatment produced two-layer surface film with thin (about 100 nm) gel-like phosphate film over the oxide layer with thickness of about 30 nm on the titanium surface. The composition and chemistry of electrochemically treated titanium surfaces were examined by X-ray photoelectron spectroscopy (XPS). The effectiveness of the new treatment was examined by comparing the behavior of treated and untreated titanium when used for biomimetic coating with the Electrochemical Impedance Spectroscopy (EIS) used for this purpose. Findings: A thick Ca-P coating was formed on the treated titanium after immersion in SBF solution and surface morphology was then examined using SEM equipped with EDS facilities. Practical implications: new electrochemical method of coating titanium and its implant alloys with bioactive surface layer is more efficient and faster than the other in practical use. Originality/value: This study continues to support the further investigation of active phosphates for improved orthopedic applications.