Method of preparing semiporous film of aluminum oxide voltage anodization
Abstract
Abstract A METHOD OF PRODUCING A THICK FILM OF SEMIPOROUS ALUMINUM OXIDE ON A SHEET OF ALUMINUM. PORES ARE FORMED BY A HIGH VOLTAGE ANODIZING METHOD THAT INCLUDES COOLING A LOW CONCENTRATE OXALIC ACID ELECTROLYTE TO A TEMPERATURE OF SLIGHTLY ABOVE 0* CENTIGRADE AND DISCHARGING THIS COOLED ELECTROLYTE AT A HIGH FLOW RATE ON THE GEOMETRIC CENTER OF THE ALUMINUM SHEET BEING ANODIZED. ANODIC VOLTAGES ARE INITIALLY 150 DIRECT CURRENT (D.C.) VOLTS AND ARE INCREASED IN 20 VOLT INCREMENTS FOR THE FIRST 5 TO 10 MINUTES TO THE DESIRED VOLTAGE FOR A TWO HOUR PERIOD WITH THE ELECTROLYTE BEING CIRCULATED AND COOLED AT SUCH A RATE THAT ITS TEMPERATURE IS ABOUT 8* CENTIGRADE AT THE END OF THE TWO HOUR PERIOD.
Inventors
- 👤 H Lasser
Bibliographic Details
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