lining

Linings are used to change the surface properties of components. The aim is either to increase protection against corrosion or wear , or to simplify the flow of bulk materials .

Lining process

Linings are not to be confused with coatings that are applied, for example, by spraying. In the case of linings, sheets or foils are usually used. Different fastening methods are selected depending on the lining material. A distinction is made between chemical and mechanical fastening.

Chemical attachment methods are gluing and vulcanizing ; mechanical fastening methods are screws, rivets, clamps, and welding.

Corrosion-resistant linings

Corrosion-resistant linings are used where coatings and paintwork are insufficient. This is particularly the case in the chemical industry in gas scrubbers and reactors . The materials used must have a higher chemical resistance than the materials from which the components are made. In addition, it must be possible to apply the materials in a liquid- and gas-tight manner. This is achieved by welding the butt joints of the lining panels.

Materials used: fluoroplastics, e.g. B. perfluoroalkoxylalkane (PFA); nickel-based metal alloys e.g. B. Monel , Hastelloy , Inconel

Wear-resistant linings

The aim is to minimize wear on components. This is done z. B. in chutes and chutes in the building materials industry.

Materials used: Polyurethane (PUR), ceramics, wear-resistant steels

River promotion

If goods in silos, bunkers or chutes cannot be transported away, a lining can be used. So z. B. Lined coal bunkers in power plants. Here it is important that the coal can be transported evenly from the bunker into the burner. A sticking of the coal would lead to a disturbance.

For this purpose, ultra-high molecular weight polyethylene (UHMW-PE) is used, such as. B. FlexLine or Tivar88.