Flame spray wire process | plasma spray coatings | corrosion resistant coating

Flame Spray Wire

Introduction

Wire spraying is used to apply a number of different metals and their alloys.

Main Applications

Commonly used in the build up of mis-machined parts, for applying corrosion resistant coatings to steelwork and as a bearing material.

Process Description

A wire spray gun uses oxygen and acetylene to produce a flame through which metal wire is passed.

The resultant molten metal is atomised by compressed gas and sprayed on to the prepared surface to form the coating.

Available Coatings

In many cases wire spraying is a lower cost alternative to the plasma spray process for applying metals and is generally capable of building up thicker coatings than plasma. However, the range of available materials that can be sprayed is much lower than that for plasma.

This table is a guide to the range of metals available, their properties and typical applications

General Coating Characteristics

bond strengths (20 - 30 mOa / 3000 - 4000 p.s.i.)
macrohardness values between Rc 30 - 40 for some steel alloys.
higher porosity levels than equivalent plasma sprayed coatings.