Abstract
Electrodeposited chromium films implanted with nitrogen and argon ions were characterized by surface analysis, surface hardness, wear, and corrosion. Depth profiles were examined by Auger electron spectroscopy and the chemical bonding state was estimated by X-ray photoelectron spectroscopy. The near-surface hardness of nitrogen-implanted chromium was measured with a Vickers microhardness tester and a dynamic ultramicrohardness tester. Wear tests were carried out using an Ohgoshi rapid wear-testing machine and a Taber abrasion test apparatus. The corrosion resistance was investigated by the electrochemical method of cyclic voltammetry in 0.05 M H 2SO 4. The following results were obtained. 1. (1) Nitrogen implantation caused the surface hardness to increase. 2. (2)NNitrogen-implanted chromium showed a remarkable wear resistance. 3. (3) The corrosion resistance of chromium was improved markedly by nitrogen implantation. 4. (4) Nitrogen depth profiles showed definitely that there were two peaks. 5. (5) Depth profiles and measurement of chemical bonding showed that the implanted nitrogen combined with chromium to form Cr 2N.
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