Process for coating the surfaces of heat exchangers, evaporators and vaporizers comprises thermally coating the starting material on the carrier material and applying individual particles in a flame at a temperature to melt on the surface

摘要

Process for forming a surface layer having a structure similar to dendrite on a carrier material made from powdered or particulate starting material comprises: thermally coating the starting material on the carrier material; and applying the individual particles in a flame at a temperature to melt on the surface and maintain their particle form. During the coating process, relative movement between the carrier material and the flame is produced at a speed above 30 mm/s so that the structures having a structure similar to dendrite are built up by particles stacked on each other. The column diameter corresponds to the diameter of the deposited and melted particles. Preferred Features: The powder particles are made from a nickel or a nickel-based alloy, or chromium or a chromium-based alloy.