Oxidation and/or corrosion behaviors of glass-like carbon in sulfuric and nitric acids, and in aqueous hydrogen peroxide

Abstract

Oxidation and/or corrosion behaviors of glass-like carbons (GLCs) in H₂SO₄, HNO₃ and in H₂O₂ aq at 70^oC were investigated with SEM, XPS and by measuring relative weight changes for 7 days. H₂SO₄ oxidizes C atoms at the GLC surface up to C-OH, while HNO₃ removes C atoms by further oxidation into the bulk forming cracks. H₂O₂ quickly removes surface C atoms to form large cavities.