Steel surfaces are coated for many reasons, from improving resistance to wear and tear, protection from corrosion and the elements or even just to make them more visually appealing.

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Finding the right coated steel product for your project will increase the quality of your final output. Learn more about steel coated steel products below.

Different environments and applications require specific steel coatings. Here are some of the most common treatments of steel and their appropriate applications:

Galvanised (GI)

Galvanised steel uses a zinc on steel coating and is generally used for ducting and roofing.
Galvanised steel can be formed using a ‘hot dipping’ method, as well as electro galvanisation. The metal has a shiny surface finish and a 3 out of 5 rating for corrosion resistance.

Galvannealed (GA)

Galvannealed steel is a zinc on steel coating which is usually used for automobile parts such as outer panels. The metal uses a reaction with Iron and Zinc to form a zinc-iron alloy and is formed with a process of annealing following a hot dipped galvanisation method. Galvannealed steel has a matte finish and scores a 2 out of 5 for corrosion resistance.

Galvalume (GL)

Galvalume steel uses a coating that is 43.5% zinc, 55% aluminium and 1.5% silicon. It is most often used on metal buildings and for roofing applications. It is formed using a continuous hot dipping method and has no surface finish. Galvalume has a high 4 out of 5 corrosion resistance, however, it is a registered and patented trademark brand and only licenced manufacturers can produce the metal.

Galfan (GL)

Galfan steel uses a 95% zinc and 5% aluminium coating and is most often found in white goods and in some automobile parts. It also uses a continuous hot dipping method and does not have a surface finish. It is the most modern product on this list and scores the highest for corrosion resistance, a perfect 5 out of 5. Like Galvalume it is also a patented trademark brand.

Contact us today 

There should be no doubts that Australian steel is the best option for your next project. If you have any questions about our services, or if you would like to order quality steel that is fabricated to suit your unique needs, contact Steel Fabrication Services today. Our team of expert structural steel fabricators have the experience and knowledge to answer any of your questions and will ensure that you find the best solution to suit your needs. To contact us today, simply call, fax, email for information or a steel fabrication quote, or drop by our Brookvale location.

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