Why should the electrode be dry?
Some electrode will absorb moisture in the skin, the drug will contain water, and water in welding under high temperature decomposition of atoms H and O atoms, the two atoms into the weld on the weld quality will be the formation of bad, so the electrode drying before use.Specific can be in accordance with the specifications of the temperature and time in the drying box. If there is no manual, you can also press the following temperature:The acid electrode is dried at 100150 degrees 1-1.5HAlkaline bottom hydrogen electrode is dried at 380-420 degrees 1-1.5HIron powder acid electrode drying at 150-200 degrees 1-1.5H.
Some of the electrode coating will absorb moisture, the skin will contain moisture in the welding process, water will be decomposed into hydrogen overflow, part of it will stay in the weld to form hydrogen pores.
Welding rod often causes the deterioration of the process performance due to moisture absorption, resulting in unstable arc, splash, and easy to produce porosity, cracks and other defects. Therefore, the electrode must be strictly dried before use. The drying temperature of ordinary acid welding rod is 150--200 DEG C, the time is 1 hours. The drying temperature of basic electrode is 350--400 degrees centigrade, the time is 1--2 hours. After drying, it is placed in the incubator of 100--150 DEG C, and it is used as caries
