Gordon England Surface Engineering Forum

COMBUSTION WIRE THERMAL SPRAYING PROCESS

Flame Spraying

Flame Spraying or Metal Spraying Process

Schematic Diagram of The Combustion Wire Thermal Spraying Process

(also known previously as Flame Spraying, Metallizing, and Metal Spraying Processes)

Flame Spraying Process

A Complete Combustion Wire Thermal Spray Process Installation

The Combustion Wire Thermal Spray Process formerly known as Metallizing, Flame Spraying and Metal Spraying Processes was first invented in 1910 by Schoop in Switzerland

Flame Spraying Gun
Old Type Schoop Gun

Flame Spraying Process
Recent Gun Spraying 13% Chromium Steel

The flame spraying process is basically the spraying of molten metal* onto a surface to provide a coating. Material in wire form is melted in a flame (oxy-acetylene flame most common) and atomised using compressed air to form a fine spray. When the spray contacts the prepared surface of a substrate material, the fine molten droplets rapidly solidify forming a coating. This process carried out correctly is called a "cold process" (relative to the substrate material being coated) as the substrate temperature can be kept low during processing avoiding damage, metallurgical changes and distortion to the substrate material.

This flame spraying process has been extensively used in the past and today for machine element work and anti-corrosion coatings.

* Ceramics and cermets can be used in rod or composite wire form.

Flame Spraying Process

Common materials for flame spraying:

Process Advantages:

Process Disadvantages:







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