How can you matt stainless steel?

Stainless steel is often very shiny. But that does not like everyone. The question quickly arises as to how stainless steel can be matted. Finally, there are different procedures. Below we have summarized all the techniques you can use to matt stainless steel.

Differences in stainless steel matting

However, at first it is crucial how you want to matt or satin stainless steel. Although you can set the surface almost arbitrary, yet here are two types of matting distinguished. Matt or semi-gloss or matt glossy. Often referred to as matt glossy and dull painted.

Influence on the surface structure

In addition to the actual matting you can also adjust the surface structure. Here is the comma-dash structuring called, you can achieve, for example, by brushing stainless steel. Opposite stands the completely smooth, homogeneous stainless steel surface. From this it can be deduced that there are different techniques for satinizing:

  • sanding and polishing
  • blasting (sand, glass bead or stainless steel shot blasting, for example
  • chemical matting through acid (etching)
  • brushing

Brushing stainless steel for matting

Brushing is achieved however, the surface is severely damaged, depending on the size of the wire, the speed and the contact pressure, completely different surface images are created, which in addition to the matting create a very rough surface Stainless steel

If, however, the surface is to become smoother again and a corresponding structuring (such as comma-dash structuring) is maintained, the stainless steel surface must be sanded in the next work step and then polished if necessary.

However, matting may be required in the abrasive grain size a maximum of 400e If the grain size is even finer, the result is a shiny stainless steel surface. Instead, if the surface is to become even smoother and the desired satiny in nuances has not been achieved, is now polished.

Polishing of stainless steel for dulling

For polishing, non-woven discs are used, with appropriate polishing pastes if necessary. Many metalworking companies recommend Scotch Brite in particular. Scotch Brite, however, is the trade name for a grinding and polishing fleece brand.

Nevertheless, the name has become colloquially accepted (similar to Plexiglas instead of acrylic glass or Flex instead of angle grinder). You can read more in detail here about polishing stainless steel.

Blasting stainless steel for dulling

Sandblasting, which also uses glass beads, steel balls, ceramic beads, etc., is also a good technique for satinizing stainless steel. Above all, a high surface compaction is achieved, which is why the stainless steel surface is less susceptible to mechanical stress. In stainless steel exhaust systems of motorcycles, it is an often used technique. Chemische The chemical satin finish or dulling of stainless steel

Still the chemical process to matt the surface of stainless steel. In particular, the etching of stainless steel is worth mentioning here. The etching also changes the microstructure and changes various properties. In addition, there is the high health risk, because the etching of stainless steel takes me among other hydrochloric acid.

Tips & Tricks Regardless of which process you choose for matting stainless steel, it is important to consider the special properties of the steel alloy. Never treat a stainless steel surface with a wire brush that is made of less precious steel. Even sandpaper or polishing fleece used to process base metals may no longer be used for stainless steel machining. You must even store stainless steel and other steels or non-ferrous and ferrous metals separately.

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