Why is the welding of important structure using alkaline electrode?
The skin contains many basic oxides (CaO, Na2O, etc.) called alkaline electrode. The basic electrode has strong desulfurization and dephosphorization ability, and the coating has the function of hydrogen removal. The hydrogen content of welding joint is very low, so it is also called low hydrogen type welding rod. Basic welding seam has good crack resistance and mechanical properties, but poor technology performance, general DC power supply welding, mainly used for important structures (such as boiler, pressure vessel and alloy steel welding etc.).
Alkaline is a low hydrogen electrode, which can control the hydrogen content in the weld, avoid hydrogen embrittlement and lead to structural failure. Hydrogen embrittlement is the sudden breaking of the weld force
The mechanical properties especially the plasticity and toughness than acid electrode good
