Requlation of the surface microrelief of coarse-grained and ultrafine-grained titanium by etching method


In this paper we study the surface modification of titanium Grade 4 by the method of chemical etching of titanium with coarse-grained (CG) and ultrafine-grained (UFG) structure. It is shown that the most homogeneous the surface micro relief is formed in samples with UMP structure after chemical etching in a solution of 30 % HNO3+3 % HF. The results of the study of the surface of titanium with CG and UFG structure after chemical etching indicate that fine-grained state more intensively subjected to etching. As the result, more homogeneous surface is formed.