8 Mirror finishing is that it improves corrosion resistance. The final process involves buffing the surface for 5-10 minutes to create a mirror-like, highly reflective finish.Ī benefit of No. For this stage, it is essential to remove deep scratches as any surface defects will be very noticeable on the finished product. Alternatively a special rolling procedure is used which can simulate the appearance of mechanical abrasion. 8 Mirror finish is created by mechanically treating the surface with a series of progressively finer abrasives. It also masks the after-effects of welding and hides surface damage. The polishing process enhances appearance and consistency, making cleaning easier. Mirror finishes are highly reflective and created by polishing the stainless steel. The DeLorean DMC-12 sports car, most famous for being featured in the Back to the Future films, is paneled in brushed stainless steel. The Gateway Arch in St Louis, Missouri is the world’s tallest arch and is clad in brushed stainless steel. The finish is created by sanding the stainless steel in one direction with a 120-180 grit belt, followed by softening with a 80-120 grit medium non-woven belt. The drawbacks to this finish include reduced corrosion resistance, because the grooves of the finish are susceptible to rust. For example, overly reflective stainless steel accents on a building could be blinding in bright sunlight. It has strong decorative appeal without being too reflective, as too much reflectiveness can be undesirable. It can be helpful to request a sample of a few square inches to ensure the finish achieves the desired effect.īrushing the stainless steel produces a distinctive look with a muted luster and a pattern of fine parallel lines. Some level of variation should be expected when ordering No. The variations arise from differing manufacturing conditions, such as wearing of the abrasive belts used in these finishes. 4 Brushed finish can vary with different suppliers and even from batch to batch from the same supplier. Three more common stainless steel finishing options are: Consequently a new surface finish description was introduced which remains in use to this day. However, it was soon discovered that some of these dull polished finishes had poor corrosion resistance, especially when exposed to seawater. Further testing revealed that steel with high surface roughness was heavily damaged by the polishing operations, whereas steel with low surface roughness was relatively unscathed.ĭuring the mid-1980’s dull polished finishes became widely used on projects such as high-profile architectural projects. The development of the surface finish standardĭuring the late 1970’s, British Steel scientists found that dull polished finishes on stainless steel showed a wide range of surface roughness. The choice of finish should always be clearly specified and properly defined by standard industry designations. Smooth surface finishes are better where the steel will be blended. Rough surface finishes are appropriate when the steel will be ground prior to painting and gluing. The choice of surface finish is also important where fabrication processes will be applied. 4 finish is one of the most popular finishes available. In retail products, particularly kitchen appliances, stainless steel No. For example, in architecture and the automotive industries, different finishes can be used to achieve a variety of visual effects. In projects when design is a primary consideration, an attractive finish will enhance the appeal of the end-product. Whatever the intended use, choosing the right finish option is essential. There are a number of stainless steel finishing options that alter more than just the appearance of the material.
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