| 摘要 |
PURPOSE:To form hard oxidized film having no burn in a short time, by measur ing temp. of an Al material, and stopping or starting electricity conduction in cases a prescribed value is exceeded or turned back respectively, and repeating this. CONSTITUTION:The Al material 1 pretreated by conventional method, and an opposing electrode 2 are dipped in electrolytic bath in an electrolytic cell 8, DC current is impressed to each of them from a programmable DC source 6 to oxidize the material anodically. A thermocouple 3 is attached to the mate rial 1 to measure the temp. thereof, and the measured value is sent to a micro computer 5 through a multichannel and digital multimeter 4. Electricity conduc tion from the source 6 is stopped by the computer 5 if the measured value exceeds a prescribed value, and started if the returns to said value. The opera tion is repeated.
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