Abstract
Ti +O + double-ion implantations in pure iron have been performed with 1 × 10 17 Ti +/cm 2 at 150 keV and with 1 × 10 17 and 2×10 17 O +/cm 2 at 50 or 35 keV at room temperature. Oxidation state of pre-implanted titanium was investigated by means of X-ray photoelectron spectroscopy. Colored surfaces were produced by the double-ion implantations combined with an electrochemical oxidation of the specimens. Colors such as deep blue, purple, and brown appeared after the electrochemical oxidation with cyclic voltammetry in a 0.5 mol/dm 3 acetate buffer solution of pH 5. The mechanism of the coloring is discussed from analysis of the oxidation state of pre-implanted titanium and concentration-depth profiles of the titanium before and after the anodic oxidation of specimen electrodes. These results showed that double-ion implantations are a useful technique to achieve the coloring with corrosion inhibition of iron surfaces.
Published Version
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