MagiZinc® from international steel producer Corus is a new hot-dip, zinc-based metallic coating with superior corrosion properties. In accelerated tests, the corrosion resistance of the new product was at least four times as effective for the same coating thickness as products galvanized with zinc alone.

MagiZinc® from international steel producer Corus is a new hot-dip, zinc-based metallic coating with superior corrosion properties. In accelerated tests, the corrosion resistance of the new product was at least four times as effective for the same coating thickness as products galvanized with zinc alone.

According to the company, the new coating can provide significant savings for applications that currently use thin hot-dip galvanized steel with a zinc coating of 275 g/m2. Initial promising applications include those in which there is a relatively high proportion of zinc to steel, such as channels for ventilation systems and cable trays in large commercial and residential buildings. The product also can be applied in the automotive sector, particularly for non-visual, rust-sensitive parts of bodywork, where maximum advantage can be achieved through the improved corrosion performance. The potential to reduce coating weights in automotive applications, which is also attractive, is being explored.

The new product consists predominantly of zinc, with additions of both magnesium and aluminum. The improved corrosion protection of the new coating compared with conventional zinc coatings offers the opportunity to reduce the metallic coating weight while still improving the properties of the material. This weight reduction makes thinner and lighter coating layers possible, resulting in up to 4% more square meters of coverage per metric ton of material for the end user. Products with a 275 g/m2 zinc coating can use a MagiZinc coating of 140 g/m2. Even thinner coating layers are under development.

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