To restore the corrosion resistance quality in and around the welded area, a galvanized spray or an equivalent paint may be used after thoroughly cleaning the area. The zinc coating on the welding location and surrounding is removed/burns away. The smoke color of galvanized metal welding is yellow-green.Īnother issue with welding galvanized steel is maintaining its corrosion resistance after welding. Safety measures are very important for the welder to avoid inhaling zinc oxide and lead oxide. This is highly toxic, and inhaling it can cause temporary health issues like headaches and nausea and long-term health issues like anemia, kidney problems, and carcinogens. The lead content in the vapor/smoke reacts with the oxygen in the air to form a lead oxide. The real trouble comes from the 0.5% lead content in the zinc used for galvanization.The zinc oxide is not highly toxic but can cause uneasiness. The zinc content in the vapor reacts with the oxygen in the air and becomes zinc oxide.The galvanized layer burns off into vapor/fumes at welding temperature and mixes with the regular welding smoke. The melting point of the galvanized layer is very low compared to the steel beneath it. The reason is quite simple it is easy to galvanize a steel sheet but difficult and uneconomical to galvanize a bulky fabricated item. You may think why the galvanizing cannot be done after fabrication. Welders worry about welding galvanized steel since the fumes produced during welding are toxic and dangerous to the welder’s health. Why this fuss about welding galvanized steel? Let us understand the complexity and see how experienced welders do the welding of galvanized steel. Welding galvanizing steel has complexity, which is exactly our discussion topic. However, galvanized steel can be fabricated to its end product using multiple operations, including welding. Due to this reason, it finds wide application in automobile, construction, and other industries. Galvanized steel has many advantages over normal steel, and the major advantage is its resistance against rusting and corrosion. The difference between normal steel and galvanized steel is the presence of the zinc layer that makes it rust-resistant.

Flux core welding galvanized steel