Investigation of the regeneration of the passive surface oxide layer of TiAl6V4 alloy printed by WAAM technology using different electrochemical test methods

Abstract

The kinetics of oxide layer formation on surface of Ti6Al4V alloy samples is a very important property especially if their application as medical implants is planned. Damaged protective surface layer usually heals in ambient condition however; during the self‐healing process toxic species can get into the surrounding living tissue. In our experiment the kinetics of the healing process proceeding at 3D printed alloy surface has been studied using electrochemical methods, among them scanning electrochemical microscopy. More than 40 min. time period was found long enough for total healing.

Evaluation of the Applicability of Voltammetric Modes in Scanning Electrochemical Microscopy for In Situ Corrosion Characterisation of Copper-Based Materials

“…On the other hand, ion-selective microelectrodes have also been employed as SECM tips in a potentiometric operation [35]. As result, SECM has gained increasing interest and application, especially ove past fifteen years, with significant achievements in the study of pitting initiation and p agation [17,18], galvanic pair formation [19][20][21], the resolution of surface microstruc [22][23][24], stress corrosion [25,26], and the investigation of electron transfer kinetics in sive oxide layers [27,28]. In addition, it is also used to establish the effectiveness of d ent corrosion protection schemes or technologies, including coatings [29][30][31] or su treatments [32][33][34].…”