Twin Wire Arc

In the arc spray process, an arc is struck between two continuously fed alloy wires causing the tips of the wires to melt. An air jet atomizing gas is used to strip the molten material off the wires and accelerate the motel particles to the workpiece. Arc spraying is a relatively economical coating with reasonable wear resistance properties. Materials typically applied by arc spraying include stainless steels, Hastelloys, nickel aluminides, zinc, aluminum and bronze.

Features and Benefits

Ductile coating deposit

Benefit: Can salvage severely worn or damaged components where finish machining processes can return the item to its original dimension.

Bond strength > 5,000 psi

Benefit: Provides a durable coating that can withstand applications with moderate sliding and impact wear.

Wide variety of alloys can be applied

Benefit: Allows surface engineering design to optimize for environmental conditions such as; wear resistance, corrosion resistance, oxidation resistance, low coefficient of friction, or dielectric properties.

Most common alloys are machinable

Benefit: A good choice for dimensional restoration

Low porosity, <5%

Benefit: When combined with a sealer this process can produce coatings that are impermeable to process environments

High deposit rates with coating thickness up to 0.100”F

Benefit: Capable of applying thick coatings on large components

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