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Effect of thermal oxidation and carbon concentration on Co-Cr-Mo alloy in enhanced corrosion protection

Mas Ayu, Hassan and Rosdi, Daud and A., Shah and M. H. M., Hazwan and Siti Haryani, Tomadi and Salwani, Mohd Salleh (2018) Effect of thermal oxidation and carbon concentration on Co-Cr-Mo alloy in enhanced corrosion protection. In: Materials Science Forum, 6th International Conference on Nanostructures, Nanomaterials and Nanoengineering, ICNNN 2017 and 2nd International Conference on Materials Technology and Applications, ICMTA 2017, 26-29 Oktober 2017 , Tokyo, Japan. pp. 1-7.. ISSN 02555476 ISBN 978-303571201-8

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Abstract

Surface modification of metallic implants is often required to facilitate positive interaction between the implant and the surrounding hard tissue. In the present study, an oxide layer (Cr2O3) was successfully created on a Co-Cr-Mo alloys substrate by using thermal oxidation technique in atmospheric condition. The effect of different carbon content (0.03% and 0.24%) of oxidized Co-Cr-Mo alloys was investigated in terms of its corrosion behavior using electrochemical impedance spectroscopy techniques when immersed in simulated body fluids. The test was repeated for five times for each of sample condition. The results demonstrated that thermal oxidation and carbon content have correlation in influencing the corrosion performance in Co-Cr-Mo alloys. A high carbon content sample generates a lower corrosion-rate compared to low carbon content sample even though all samples were treated at similar oxidation temperature and time duration. Observation also showed that less diffusion of cobalt released in high carbon sample which is believed has effects in creating the uniformity and dense oxide layer without any presence of microcracks and delamination. This phenomenon can be concluded that carbon content in Co-Cr-Mo alloy have influence in controlling the reaction of metal elements during thermal oxidation which is beneficial in formation of oxide layer. The uniformity and compact oxide layer substantially have enhanced the corrosion resistance of high carbon Co-Cr-Mo alloy.

Item Type: Conference or Workshop Item (Lecture)
Additional Information: Index by Scopus
Uncontrolled Keywords: Co-Cr-Mo alloy; Corrosion protection; Thermal oxidation; Simulated body fluid; Surface morphology
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
Faculty/Division: Faculty of Mechanical Engineering
Depositing User: Pn. Hazlinda Abd Rahman
Date Deposited: 24 May 2018 05:19
Last Modified: 24 May 2018 05:19
URI: http://umpir.ump.edu.my/id/eprint/20572
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