Determination of moisture resistance of covered electrodes according to PN-EN ISO 14372

Abstract


 
 
 Moisture present in the electrode covering is one of the sources of diffusible hydrogen in welded joints. In order to study the diffusible hydrogen content in deposited metal, a stand for moisturizing covered electrodes, in accordance with the PN-EN ISO 14372 standard, was built. After the stand was completed, a test of moisturizing the electrodes was carried out and measurements of the diffusible hydrogen content in deposited metal using the mercury method (according to PN-EN ISO 3690) were conducted. The research was aimed at verifying the correctness of the operation of test stand and indirect determination of the influence of storage of rutile-cellulose and cellulose electrodes under fixed conditions on the degree of moisturizing of the weld metal. Both tested electrode grades belong to the group of electrodes with a standard covering.
 
 

Influence of Stick Electrode Coating’s Moisture Content on the Diffusible Hydrogen in Underwater Wet Shielded Metal Arc Welding

“…[26]. In 2019 it was shown that absorbed moisture, due to the storage conditions (expose to humid air) of stick electrodes, leads to increased diffusible hydrogen contents [27,28]. The difference was significant (p < 0.05; mean differences: 1.7 ml/100 g when welded dry, 3 ml/100 g when welded wet).…”