In contrast to unalloyed construction steel, Corten steel gets its weather-resistant properties from the addition of copper, chromium and nickel Characteristics. Normal unalloyed steel wells would simply rust through after a while, but not with ours corten steel fountain. The cause of the weather resistance lies in the formation of the barrier layer that protects the material from further rust protection. The only important thing is that the material can always dry off again in between, damp / dry is of particular importance to form an optimal patina. With our water basins made of Corten steel with standing water if this is not the case, our pools are specially sealed from the inside so that you don't have brown water all the time, and no rusting through occurs. In contrast to unalloyed structural steels, the rusting process in weather-resistant structural steels is slower. While unalloyed construction steel rusts through unhindered, the loss of corrosion with CorTen steel ends after about 3 years. The rusting after approx. 3 years is only approx. 0.05 mm. During this period, the sheet color changes from light brown to brown-violet dark brown-violet. The sheet metal surface then has a pitted structure. Corten steel should not be covered, so that that Material can always "breathe".