1.Why you need pre-treatment before powder coating?

you will know the importance of pre-treatment before powder coating. Different pre treatment chemicals for Mild Steel, G.I and casting material.

For better powder coating results

Clean metal by itself can be immediately powder coated but that will not give you superior performance and weathering characteristics. A good pretreatment allows the powder coating to better bond physically to the metal, withstand exterior weathering, and prevents flash rust prior to powder coating.  Because of all the benefits associated with it, you should always consider adding metal pretreatment to your coating process.


2.What kind of pre-treatment should I use?


First, determine what you’ll be coating the most often. If you are coating sheet steel, for example, you will usually only need light oil cleaning. Angle iron or castings often need sand/shot blasting to remove scale and surface rust. Aluminum is prepared differently than galvanized or regular steel; the oxidation layer of aluminum must be removed, which requires certain chemicals that provide a good etched layer for paint adhesion.


3.The most common types of metal cleaning are:
Blasting.Blasting with sand or shot is a great way to clean up metal scale, laser scale, rough welds, or heavily rusted steel. Blasting is also used to strip off previously coated metal for refinishing. While blasting smooths out a lot of surface defects in raw metal, it does not fully clean the metal of oils or other contaminants. However, blasting does create a more adhesive surface for the powder coating after the part has been cleaned of residual soils.

Washing. Pressure washing, dipping, or automatic washing (with a soap specifically formulated for the soils specific to your fabricating process) are the most effective ways of cleaning the metal prior to the next finishing stage. Steam cleaning or hot water helps break down the oils and can reach difficult spots or gaps in the surface. Detergent is the best way of cleaning metal of oils, waxes, polishing compounds, or other substances that will prevent the powder from sticking to the metal.


4.How to choose right industrial Powder Coating Equipment ?
If you are selecting a new powder coating equipment for your plant. You need to buy a new equipment or you are looking for the replacement of your existing supplier due to poor service.

First and foremost question you need to clarify is why you need a powder coating gun ?
You need a powder coating gun to charge the powder electrostatic so the powder adheres to object till it reaches in the curing oven and to spray the powder in such a way that it delivers uniform film thickness.
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