Effect of Environment on the Defects of Welded Aluminum AA 1100

摘要

Conditions around the environment are crucial in the process of welding defects. Temperature, humidity, and air velocity are determinants of hydrogen rise. The formation of hydrogen in the air caused by unfavorable environment can cause defects in the welded joint. The more vapor in the air, the more hydrogen is formed. One welding defect caused by hydrogen content is porosity. Porosity is formed in aluminum welding due to the presence of hydrogen trapped in the A1 weld metal. This study discusses welding protection involving experiments with variations in temperature of 20°C, 25°C, 30°C, variations in relative humidity of 65%, 72%, 80%, and air velocity of 1.5m/s; 1.7 m/s; 2.0 m/s so as to minimize porosity defects at the welding joint due to hydrogen. In research shows the lower the temperature, the lower the solubility of hydrogen, this happens because the solubility of hydrogen at low temperatures is very limited. While welding is carried out with a relatively high humidity level, the higher the hydrogen reserves.