Reduction of Outgassing Rate before Baking from Stainless Steel by Evacuation Cycles

Effect of the number of evacuation cycles at room temperature on outgassing rate before baking was investigated. A test chamber was fabricated of type-304 stainless steel and finished with buff and electrolytic polishing. Seven succesive evacuation cycles without baking reduced the outgassing rate before baking to that obtained after several evacuation cycles including baking at 15..