抄録
The effects of ultraviolet irradiation on three-step coloring film were investigated through TEM observation and the measurement of chromaticity and of the metal content. TEM observation revealed that ultraviolet irradiation apparently decreases electrodeposits in the DC anodic oxidation film. Metals that had electrodeposited in the process for three-step coloring film were ascertained by means of neutron activation analysis, which revealed that ultraviolet irradiation does not change the amount of nickel and tin in the film as a whole. In addition, the percentage of nickel in the electrodeposits was found to be higher than that previously reported.
