ADHESION OF THE BIOACTIVE LAYER ON TITANIUM ALLOY SUBSTRATE BY TAPE-TEST

An attempt was made to assess whether the ASTM D 3359 test is a suitable method for adhesion measurement of layers formed on Ti6Al4V surfaces by: alkali treatment in 10 mol/l NaOH; precalcification in SCS (supersaturated calcification solution); and in-vitro tests in SBF (simulated body fluid). The tape-test is suitable for the evaluation of adhesion of coatings after chemical treatment and after short-time precalcification. Adhesion of the coatings was excellent, classified as category 5. The test is not suitable for coatings precalcified for a long time when large spherical crystals are formed. The cracking of the coatings during drying prevented reliable results of adhesion of HA-coatings to substrate after in-vitro tests to be obtained. 12 refs.