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Wire Arc Spray

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Metal Coat
Wire Arc Spray

 

So, if you are having any thing at home which is made up of a metallic material then you must be knowing the term rust. It's pretty obvious that we know the phenomena of rusting since childhood. Nobody loves that reddish brown layer over their metallic stuff kept at home.

Over the decades, mankind has been devising different plans and techniques to preserve their metallic substances from rusting or corrosion. From painting the material to applying some sophisticated thermal spray technique, there are large variety of methods applied over the years to keep our metals free from decaying. Scientists from Material Sciences and Metallurgy field as well as other Engineering fields started searching for a very efficient way of coating a metal, with perfect smoothness and surface finish. Between 1910 and 1920 they were able to launch a new technique for metal coating known as Wire Arc Spraying (also known as a classical method of thermal spraying to form a coating over a metallic material).

What is Wire Arc Spraying?

Wire arc spraying is a type of thermal spraying method for coating a material(especially metal). This coating can be purposeful by either providing some thickness to the metal surface or by providing a proper surface finish. Wire Arc Spraying was actually found around 1910-1920 and was one of the classical methods of coating a metal. In this method, the arc spray uses DC power to energise both conductive wires. Where's one wire is a positive and the other is negative. These wires after getting energised are fed through a feeder into a gun head. Now it is the gun head where the wires meet and arc against each other, hence resulting into the molten material out of it. After the material is molten, there is an introduction of ordinary dry compressed air to the arc zone, atomizing the molten material into very tiny droplets. This dry compressed air also propels those tiny droplets towards the workpiece or the prepared part. The moment when the droplets hit the work piece or part, they get flatten out and make splats. These splats interlock on top of the surface first and later on top on one another to create and extremely strong mechanical bond.

Now, the thickness of the coating is much variable. That means, using wire arc spraying technique one can create a surface thickness as thin as 0.5 mil or as high as 4 mils. Finding good and expert wire arc spray manufacturer can be tough job, but you can always trust Metal Coat in this journery.

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