Analysis of the acid, base and air oxidized carbon microspheres synthesized in a single step from waste engine oil

作者：Datta Abheek; Sadhu Anustup; Sen Bhaskar; Kaur Manpreet; Sharma Rajhans; Das Santosh Ch; Bhattacharyya Sayan^*

来源：Corrosion Science, 2013, 73: 356-364.

DOI：10.1016/j.corsci.2013.04.024

• Weight loss
• SEM
• IR spectroscopy
• Raman spectroscopy
• Oxidation

Carbon microsphere (C-mu S) ball bearings are prone to corrode after long exposure to oxidizing environments. similar to 4.2 mu m diameter C-mu Ss synthesized from waste engine oil (at 600 and 900 degrees C) by dry autoclaving, were exposed to nitric acid (30 and 60 vol.%), piranha (H2SO4:H2O2 60:40 and 90:10), base (NH4OH:H2O2 15:30 and 30:15) and air oxidation at 300 and 450 degrees C for 12-48 h. The oxidation processes were monitored by weight loss analyses, scanning electron microscopy, X-ray diffraction, Raman spectroscopy, chemical functionalization and electrical conductivity measurements. Crystallinity and higher graphitic content in the C-mu Ss results in better resistance to oxidation.

• 出版日期2013-8