Paper Title:

Effect of Pickling Process on Adhesion Strength of Ti Oxide Layer on Titanium Alloy Substrate

Periodical Advanced Materials Research (Volumes 146 - 147)
Main Theme Advances in Superalloys
Edited by Sihai Jiao, Zhengyi Jiang and Jinglong Bu
Pages 1621-1630
DOI 10.4028/www.scientific.net/AMR.146-147.1621
Citation Izman Sudin et al., 2010, Advanced Materials Research, 146-147, 1621
Online since October, 2010
Authors Izman Sudin, Mohammed Rafiq Abdul Kadir, Mahmood Anwar, Engku Mohammad Nazim, Low Yik Kuan, Eng Kean Khor
Keywords Biomedical, Diamond Coating, Pickling, Sustainability, Thermal Oxidation, Titanium Alloy
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Titanium alloys are commonly used in biomedical application in hard tissues replacement especially for knee and hip implants. Surface modifications are required prior to diamond coating process for improving the tribological and wear properties of the titanium alloy. In this study, experiments were carried out to investigate the effects of different pickling times as well as temperature on the adhesion strength of oxide layer formed on the Titanium alloy after oxidation process. The aqueous acid solution of HF and HNO3 was used as a pickling solution. The chemical pretreatment was carried out at 4 levels by varying the pickling time as well as temperature. All treated samples were thermally oxidized in a fixed parameters at 900 °C for 25 hours. Surface morphology, oxide layer thickness and adhesion strength were measured after each step using FESEM and Blast Wear Tester (BWT). It was revealed that the thickness of oxide layer increases with pickling time but the adhesion strengths become weaker. It was also found that the adhesion strength of oxide layer formed on Ti substrate surface increases with the increase of temperature while the thickness of the oxide layer decreased within 40oC pickling temperature.

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