Abstract
This study proposes a new method, electrochemical critical localized corrosion potential (E-CLCP), in order to evaluate localized corrosion resistance of biomedical additive manufacturing (AM) titanium (Ti) alloys. The procedures for determining E-CLCP are completely different from that of the electrochemical critically localized corrosion temperature (E-CLCT) method (ISO 22910:2020). However, its application should be limited to pH and temperature of the human body because of the temperature scan. E-CLCP displays the localized corrosion resistance of AM Ti alloys based on the human body’s repassivation kinetics, whereas E-CLCT displays the localized corrosion resistance of the alloys based on passive film breakdown in much harsher corrosive environments.
Highlights
Titanium (Ti) alloys with high strength-to-weight ratio and good corrosion resistance are used in marine, aerospace, and biomedical industries [1,2,3,4]
This study proposed a new method (E-CLCP) to evaluate the localized corrosion resistance of additive manufacturing (AM) Ti alloys in biomedical solution environments
The procedures for determining electrochemical critical localized corrosion potential (E-CLCP) are completely different from the electrochemical critically localized corrosion temperature (E-CLCT) and conventional crevice potential (CCP)
Summary
Titanium (Ti) alloys with high strength-to-weight ratio and good corrosion resistance are used in marine, aerospace, and biomedical industries [1,2,3,4]. Tsujikawa and Hisamatsu [35] evolved a step-wise method that depends on growing crevice corrosions and gradually decreases the potential to clearly capture repassivation by evaluating the critical crevice potential (CCP) This method was complied with an American Society for Testing and Materials (ASTM) standard (G192) [36] and amalgamates the potentiodynamic, galvanostatic, and potentiostatic steps to allow for more control in the development and repassivation of localized corrosion. The E-CLCP method proposes a new criterion for the evaluation of resistance relative to localized corrosion of biomedical AM Ti alloys in human body environments. This new method combines potentiodynamic, galvanostatic, and potentiostatic steps to allow for more control in the development and repassivation of localized corrosion. The mechanisms of resistance to localized corrosion on the as-received and heattreated AM Ti–6Al–4V alloys are investigated under E-CLCT and E-CLCP environments in order to clarify the differences in their behaviors under localized corrosion and repassivation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
