Article | REF: M1645 V1

Thermal spray coatings

Author: Alain PRONER

Publication date: September 10, 1999

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1. Thermal spraying

1.1 General principle

Thermal spraying encompasses all processes whereby a filler material is melted or brought to a plastic state by a heat source, then sprayed onto the surface to be coated, where it solidifies.

As a result, the base surface does not undergo any melting.

Deposit adhesion is mechanical.

Figure 3 shows the general principle of thermal spraying: the material to be deposited, in powder, wire, cord or rod form, is totally or partially melted in a heat source (flame, electric arc, plasma). A carrier gas is used to atomize the material, and transport the droplets thus formed to the surface to...

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