Method for adjusting the coolant consumption within actively cooled components, and component

A method for adjusting the flow of a medium within a hollow component, comprising:

• providing a hollow component which in the interior includes a duct with different regions which include different cross sections of flow, a first region with a smaller cross section and a second region with a larger cross section;
• producing a first diffusion coating in the first region by a first diffusion coating process using to first coating material;
• and
• producing a second diffusion coating in the first region and in the second region by a second diffusion coating process, which is different from the first diffusion coating process, using a second coating material,
• wherein because of the production of the two coating processes in the first region, a greater wall thickening occurs in the first region than in the second region, whereby a thicker first layer is formed on the first region than a second layer formed on the second region,
• wherein different coating materials are used for the diffusion coating processes, and
• wherein a second coating material is applied on top of a first coating material.