Surface Modification of Cobalt Chromium Alloy via Phosphonic Acid Organic Nanosized Thin Films

Abstract

To address critical challenges with the use of Co-Cr alloy, a common metal alloy used in biomedical applications we demonstrated the formation of phosphonic acid organic nanosized thins films on Co-Cr alloy. X-ray photoelectron spectroscopy (XPS) determined the surface atomic composition before and after film deposition. The presence of phosphorous 'P' after deposition indicated presence of organic film formation. Similarly, changes in surface hydrophobicity as indicated by contact angle measurements suggested organic thin film formation.

Electrochemical Corrosion Study of Protective Organic Thin Film Coating on Magnesium Alloy

“…(cathodic reaction) [3] The production of OH − ions will increase the pH of the solution, which favors the formation of Mg hydroxide as in the following reaction:…”

“…Recently, there is great interest for using biodegradable materials in many orthopedic applications (1)(2)(3)(4)(5). The biodegradable properties of Magnesium and its alloys have been used in many biomedical applications especially for cardiovascular applications (6)(7).…”

Ambient Atmospheric Stability of Organic Thin Films on Metal Alloys

“…It has good wear resistance, crevice corrosion resistance and pitting resistance [6]. It also has high abrasion resistance, fatigue strength along with good workability and ductility [7]. Critical challenges exist in successful application of this material in-vivo.…”

Direct Laser Patterning of Self Assembled Monolayers On Cobalt Chromium (Co-Cr) Alloy

“…*Email: anil.mahapatro@wichita.edu Cobalt Chromium (Co-Cr) alloy has been extensively used for a wide variety of applications in orthopedic, cardiovascular and dentistry [1]. Successful surface modification of Co-Cr surfaces is needed to tailor its surface properties for specific applications [2]. Direct laser patterning offers significant advantages as it eliminates the need for photolithography directly or indirectly.…”