Galvanneal Sheet Metal

Galvannealed steel is created by a hot dip coating process.

Galvanneal sheet metal.

Galvannealed steel sheet metal also known as galvanneal is the result of galvanizing followed by annealing of sheet steel. Avoid painted metal degradation with resilient galvannealed steel sheet and coil products from alliance steel. Has no protective film. Galvannealed steel is very conducive to forming welding and allows for excellent paint adhesion.

Galvannealed steel has a matte grey color uniform which can be easily painted. One notable process called galvannealing. In comparison to galvanized steel the coating is harder and more brittle. Description galvannealed steel has very similar properties as standard galvanized but the surface has a more porous and abrasive finish that more readily accepts paint.

Galvannealed steel is a matte uniform grey color which can be easily painted. Galvanneal is the main paintgrip used in the duct fabrication industry taking the place of phos bond which used to be the only option many years ago. Galvannealed steel is carbon steel coated with zinc using a hot dipped process. The process produces a uniform zinc coating on both sides of the product.

As the steel emerges from the molten zinc bath all excess zinc is removed from the surface using heated air knives. It is vastly used for many miscellaneous applications. Sacrificial coatings are an excellent way to protect an underlying base material from the effects of corrosion. A40 galvanneal is the most commonly used coating while a60 is less popular because it tends to be too powdery when it sits unpainted too long.

In comparison to galvanized steel the coating is harder and more brittle. Immediately after the hot dip process the metal is exposed to a heat treatment that allows the iron from the base metal to further diffuse into the zinc creating a zinc iron alloy layer. This is preferred over galvanized if the metal is to be painted. There are however several different processes to apply this zinc layer.

Galvannealed steel zinc iron alloy coated by the hot dip process followed by heating the steel to induce diffusion alloying between the molten zinc coating and the steel. Galvannealed or galvanneal galvannealed steel is the result from the processes of galvanizing followed by annealing of sheet steel. The steel is then annealed which converts the zinc into a zinc alloy coating that offers increased corrosion and scratch resistance. Galvanneal steel is produced on a continuous hot dipped galvanized steel line.

From there the steel continues through an annealing furnace converting the zinc into a zinc iron alloy coating galvanneal. A particularly popular combination is coating carbon steel with a layer of zinc known as galvanized steel.