Tuesday, June 12th, 2012
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General reasons for pin holes in a process of powder coating wheels
You will be experiencing pin holes when you powder coat wheels of cast aluminum . Pin holing can be caused by several different things, in this case I would say that the alloy wheels are porous and the air in the pore is expanding when the parts are heated in the oven. The air then escapes into the powder film when the powder is in the liquid or melted state and as the powder solidifies during the curing process theRead More …
Some common sources of airborne contamination during powder coating application
Electrostatically applied powder can entrain airborne dirt and deposit it on the parts. They are the hardest to track and eliminate because they can come from so many different sources. Keeping a clean environment around the system is one of the best ways to reduce air borne dirt.The list below names some of the common sources of airborne contamination during powder coating application Process Equipment – The conveyor, the oven, the washer or other operations within the coating line can generateRead More …
Adhesion problem of powder coating application
Poor adhesion is usually related to poor pretreatment or under cure. Undercure -Run an electronic temperature recording device with a probe on the part to ensure that the metal temperature reaches the prescribed cure index (Time at temperature). Pretreatment – Perform regular titration and quality checks to avoid a pretreatment problem.Surface preparation is probably the cause of the poor adhesion of the powder coating powder. Not all stainless steels accept phosphate pretreatments to the same extent; some being more reactiveRead More …
D5 Creation