Patina color roof panels11/22/2023 The whole procedure takes place in a closed, continuously-operating pickling/staining system, which meets the highest environmental requirements. In our pre-weathering system, the bright rolled coils are subjected to pickling/staining and rinsed after a cleaning process. The positive effect of the patina formation is therefore no longer present. The ‘pre-weathered’ products of our market competitors are either coated or painted/varnished and therefore no longer natural. The natural surface characteristic of forming the life-long protective patina under environmental conditions is thereby retained. the patina, is anticipated in our pre-weathering system. With these variants, the colour tone of the protective layer, i.e. What we are speaking of here is our current prePATINA ECO ZINC product range in the versions, blue-grey and graphite-grey. Since the 1980s, we have been offering pre-weathered surfaces. This is where our pre-weathering comes into play. The delayed patina formation is not a disadvantage, it is a natural process, but many architects, builders and developers prefer a uniform appearance right from the start. The table-top of a garden table usually weathers faster than the table-legs – especially the sides which slope inwards. Thus, bright rolled RHEINZINK, which is installed in a corner of a building protected against the rain, will naturally develop its patina layer slower than a roof-surface on the same building. external factors, such as rain, influence the speed of the patina formation. As the process of patina forming is more irregular, it sometimes has an uneven appearance, i.e. Over time, this surface forms a matt grey protective layer, the so-called patina. We are referring to the bright rolled RHEINZINK material, as well as to our RHEINZINK CLASSIC product range. RHEINZINK coil is manufactured in a continuous process and, at the end, giant coils are created which gleam slightly and have a silvery appearance. The circulating cooling water ensures that the RHEINZINK alloy is cooled so far below the melting point that a solid cast strand is produced. The technology upon which this is based creates the conditions for a uniform and, above, all, failure-free material quality. The liquid alloy obtained is now introduced into the casting machine, one of the centrepieces of the RHEINZINK process. The ovens reach a temperature of 550☌ and melt the pre-alloy together with the fine zinc ingots and/or return scrap into the final RHEINZINK alloy. The difference to other manufacturers is that the special RHEINZINK alloy is processed in a continuous production process, from melting, to rolling, to coils of different metal thicknesses. In the 1960s, the RHEINZINK engineers played a vital role in the development of this patented melting-casting-rolling line, thus replacing the traditional packet rolling process. The RHEINZINK plant in Datteln is home to the only continuous melting-casting-rolling line worldwide! In this chapter of our series entitled ‘From Zinc to RHEINZINK’, we present a really special feature. Roof edges, porches and wall coverings shine in new splendour thanks to this noble material. RHEINZINK titanium zinc, whether as cladding for a dormer, gable, balcony or chimney, represents an upgrade for the entire building due to its appealing and sophisticated appearance. These processing possibilities allow complicated details to be mastered and the realisation of any roof shapes. The alloy composition gives the materials not just the necessary strength, but the products can easily be shaped, too. The alloy additives are important for the patina colour and the special material-technological properties. Copper, as a recycling material, comes in the form of broken scrap for processing. The fine zinc and titanium are sourced from a variety of countries of origin, such as Scandinavia, Spain, Belgium and Germany – rarely though from Mexico or Peru. RHEINZINK is an alloy which consists of fine zinc and minimal quantities of titanium and copper. Zinc has been used in construction for more than 200 years – titanium zinc is the modern version of this naturally-occurring metal.
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