Best Way To Weld Galvanized Sheet Metal

Tig welding is the way forward for metal under 0 6mm and a mig welder with decent power and wire control is needed for anything less than 0 8mm.

Best way to weld galvanized sheet metal.

Don t attempt to weld thin materials like sheet metal with flux cored wires which put more heat into the base metal. The sheet metal can be welded without removal and with a little damage to the zinc coating. Ideally there should be a 1 32 gap between the patch and the. It depends on what you are welding and how critical the application.

Use an arc welder to weld galvanized steel. We recommend using a diamond blade that s labeled as a ferrous metal cutting blade but many tradespeople use a regular masonry diamond blade with good results. We just welded em. Metal lath and hardware cloth can be cut with a tin snips but there s an easier way.

Forget the larger 1 8 inch tungsten electrode and use a smaller one. For example i worked for a while welding big tables that held furniture stripper chemicals. To weld sheet metal with solid wires use electrode positive ep or reverse polarity. The weld strength should be the same whether welding galvanized steel or not.

In general the galvanized coatings after fabrication are thicker than the recommended amount and become critical to weld. Take some time to make your patch a perfect fit. Welding tips and tricks answer. Removing the coating and re spraying or painting the weld seam after welding to regain corrosion resistance.

The best way to weld galvanized steel regardless of welding process is to remove the zinc coating from the joint. This adds two operations. Welding car panels if you are welding a large panel then the expansion of the metal during welding is likely to cause the panel to distort. Making a patch panel.

They were made from galvanized sheet metal and we didnt clean crap. Butt welded panels withstand stress better than any other type of weld joint. Hold the grinder at a 15 degree angle to the metal and make long passes along the weld area with light pressure being applied to the grinder. Welding thick galvanized coatings or butt welds or welding creases or corners where the galvanization naturally builds up benefits from grinding the galvanization off first.

Removing galvanizing from galvanized steel is best accomplished with a hard wheel flapper wheel or grinding disc attached to a grinder. The best way to weld sheet metal panels together is by butt welding which is joining them side by side see picture below. As long as the zinc oxide gets access to air to burn off. Arc welding is a versatile method that uses alternating currents to create a high heat arc that melts your flux.

Tig welding sheet metal. A standard arc welder is undoubtedly the best way to weld galvanized steel.