Storage of Electrodes
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Storing and Redrying Non-Low Hydrogen Electrodes
Electrodes in unopened Prima packets or cartons retain the proper moisture content indefinitely when stored in good condition.
If exposed to humid air for long periods of time, stick electrodes from opened containers may pick up enough moisture to affect operating characteristics or weld quality. If moisture appears to be a problem, store electrodes from the opened containers in heated cabinets at 100 to 120°F (40 to 50°C). DO NOT use higher temperatures, particularly for electrodes
Some electrodes from wet containers or long exposure to high humidity can be re-dried. Adhere to the procedures in the following table for each type.
Redrying Conditions - Non-Low Hydrogen Stick Electrodes :
||Final Redrying Temperature
|E6010: Prima 6010
E6011: Prima 6010
E7010-G: Prima 7010 G
E8010-G: Prima 8010 G
E9010-G: Prima 9010 G
|Fast Freeze - excessive moisture is indicated by a noisy arc and high spatter, rusty core wire at the holder end or objectionable coating blisters while welding.
Re-baking of this group of stick electrodes is not recommended.
|E7024: Prima 7024
||Fast Fill - excessive moisture is indicated by a noisy or "digging" arc, high spatter, tight slag, or undercut. Pre-dry unusually damp electrodes for 30 - 45 minutes at 200°F to 230°F (90 - 110°C) before final drying to minimize cracking of the coating.
|| 400 to 500°F (200to 260°C)
||30 - 45 minutes
|Fill Freeze - Excessive moisture is indicated by a noisy or "digging" arc, high spatter, tight slag or undercut. Pre-dry unusually damp electrodes for 30 - 45 minutes at 200° - 230°F (90° - 110°C) before final drying to minimize cracking of the coating
||300 to 350°F (150 to 180°C)
||20 - 30 minutes
(1) Pre-dry for 1 to 2 hours. This will minimize the tendency for coating cracks or oxidation of the alloys in the coating.
Using longer drying times or higher temperatures can easily damage the electrodes. For drying, remove the electrodes from the container and spread them out in the furnace because each stick electrode must reach the drying temperature.