Evaluation of hydrogen absorption behaviour during acid etching for surface modification of commercial pure Ti, Ti–6Al–4V and Ni–Ti superelastic alloys

Effects of the Hydrogen Absorption Conditions on the Hydrogen Embrittlement Behavior of Ni–Ti Superelastic Alloy

“…6,[10][11][12][20][21][22][23]29,30) Moreover, a second peak was observed at a high temperature. Upon immersion in 1 M HCl solution at 60°C, 34) similar hydrogen desorption is often observed to that at a high temperature, although a second peak of hydrogen desorption is not observed. The hydrogen desorption at high temperatures is considered to be associated with the stable states of hydrogen, such as hydrogen strongly trapped in defects.…”

“…In fact, the side surface of the specimens immersed in H2SO4 and H3PO4 solutions are not necessarily the same as those immersed in other solutions. [10][11][12]34) The relationship between hydrogen absorption and corrosion processes should be investigated in the future. On the basis of the present and previous results, 6,[10][11][12][20][21][22][23][29][30][31] to greatly change the hydrogen embrittlement or hydrogen desorption behavior of Ni-Ti superelastic alloy, changing the type of solution seems to be more effective than changing the solution temperature, concentration, pH, charging current density or applied potential.…”

Surface characterization, electrochemical properties and in vitro testing of hierarchically structured titanium surfaces

“…The different morphologies obtained can possibly explain the difference in hydride content observed for the two geometries since different crystallographic texture is observed. It is well known that hydrogen absorption and hydride precipitation depends on the crystallopgraphic orientation of the metal phase [32][33][34][35][36]. It was recently reported that absorption of hydrogen during acid treatment depends both on the metal composition and the acid used [32].…”

Evaluation of the mechanical and corrosion protection performance of electrodeposited hydroxyapatite on the high energy electron beam treated titanium alloy

“…Hence the surface modification is highly essential prior to HAP coating so as to improve the bioresistance of the metallic implants [26][27][28] the years, various surface modification techniques such as surface oxidation, ion implantation, chemical etching, plasma and laser treatments were established to improve the metal-ceramic interface [1,29,30]. Recently, the application of high energetic beams such as ion, electron, plasma and laser is of increasing interest to modify the surface of metallic materials.…”