(1) Welding Rod power to DC, disable AC. Because the AC current through the diver's body at the same voltage greater than the DC current. And compared with the DC, AC arc stability, could easily lead to a large splash, and increase the risk of burning the diving apparatus.

(2) All equipment, tools have good insulation and water resistance, insulation resistance shall not be less than 1M. . In order to prevent seawater, the atmospheric salt spray corrosion, need package deposited the reliable watertight insulated jacket, should be well grounded.

(3) welders wear impervious diving suit, wearing the dried rubber gloves, wrapped with a rubber diving helmet the collar metal buttons. Filter hinged on the diving helmet helmet outside, you can open and close, and filter depth should be compared with the land as a pale coloring. Underwater harness all metal parts, the waterproof insulation protection measures should be taken to prevent electrolytic corrosion or spark.

(4) replacement electrodes must issue Lazha signal power to remove the remnants of Aluminium Welding Electroderod head, a new electrode, or the installation of an automatic switch box. Welding rod should be thoroughly insulated and waterproof, only in the form of the end face of the arc to ensure electrical contact.

(5) welders working current Once connected, Never back-ground point of the workpiece, placing themselves between the operating point and the ground point should be facing the ground point, work on their own ground point In between, so as to avoid diving helmet with metal utensils by electrolysis caused damage. The welder avoid the electrode tip to point to their own diving helmet, any time, should pay attention to is not the body or any part of the tool into the circuit.