Hathaipat Koiprasert and Panadda Niranatlumpong

pp. 91 - 100

Abstract

Arc spraying as a coating method is being employed in various industrial applications as a part of
maintenance service, and also as a surface engineering technique for many machine parts and components.
The major cost in producing the arc spray coating is, however, based on the cost of the arc wire comsumables.
This project was carried out to investigate the use of the commercially-available gas metal arc welding wire
(GMAW wire) as a cheaper alternative to the special-purpose arc wire comsumables. The wire material
chosen for this early study is the 316L stainless steel, due to its popularity in many applications as a built-up
coating for worn parts. The physical properties of the coatings produced from the two sets of 316L stainless
steel wire were determined to be different in the percentage of porosity and the oxide content. The mechanical
properties, including the tensile bond strength and the wear rate of the coatings produced from the two types
of sprayed wire, were also different. This will, in turn, result in a slight difference in the performance of the
coatings.

Keywords

• Electric arc spray
• stainless steel 316L
• welding wire
• wear rate