Process to produce a coating sample

摘要

A substrate is formed by a turbine component (1) of the type to be coated. Strips of material (11a-11d) are applied to predetermined surface locations. The strip material is specially selected such that, at least in respect of the coating parameter under investigation, the coating process on the strip corresponds with that on the material from which the turbine component is made. The component and applied strips are then coated. Finally, the strip is removed for use as the coating sample. Strips of material are applied to a number of surface locations on the component, using an easily-detachable connection, formed e.g. by spot welding. The turbine component is made from an alloy. Its main alloying constituent corresponds with a main alloying constituent of the strip. The alloy is a superalloy, the main constituent being iron, nickel or cobalt. The type of turbine component concerned, is a gas turbine guide- or rotor blade. After strip removal, the coating on the component is also removed.