Surface Precipitation and Passivation on Ultrafine-Grained Titanium in Physiological Solution

Science Press Release Distribution Services

Surface Precipitation and Passivation on Ultrafine-Grained Titanium in Physiological Solution

November 11, 2020 Chemical Science 0

This study is an attempt to understand how Ti substrate microstructures influence the change in chemical composition and the repassivation of the titanium surface immersed with bovine serum albumin applied in the simulated body fluid solution. As a goal, commercial pure titanium (CP-Ti) and Ti-0.2Pd were used. For the grain refining of both metals, equivalent channel angular pressing was done. To create different microstructures for comparison, some titanium specimens were subjected to heat-treatment. For the assessment of corrosion resistance and passivation activity, electrochemical impedance spectroscopy ( EIS) was measured. X-ray photoelectronic spectroscopy and scanning electron microscopy have studied the surface compositions and morphologies. The solution used in corrosion and immersion testing was pure simulated body fluid bubbled with N2. Corrosion test results showed a higher resistance of ECAP Ti-0.2Pd to corrosion than ECAP CP-Ti. Insignificant Warburg impedance suggested the formation of porous layers on ECAP titanium and thus easy layer transformation of ions and the corrosion product. The immersion test results showed that more precipitated particles were produced on ECAP metals than on metals that were heat treated. Enhanced precipitates formed on ECAP Ti-0.2Pd were established due to an improved Ti-0.2Pd hydrogen evolution reaction relative to ECAP CP-Ti. The rainfall consisted of C, N, O, Ti, Ca and P. The bioactivity improvement of the Ti implant is basically advantageous for more Ca, P, Ti and O contents in surface deposition on ultrafine grained Ti. This result offers a way to enhance the bio-bonding between the implant and the surrounding tissue.

Author(s) Details

Qing Zhou
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Cheng-Hong Zou
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Lei Wang
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Chun-Yang Su
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/318

 

Leave a Reply

Your email address will not be published. Required fields are marked *