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Aluminum Trim Coil Peeling

The problem of coating peeling caused by aluminum cutting In the forum on painted aluminum, there was an article that one of Mr. Brett’s Windows was peeling aluminum foil, while the other window installed at the same time was doing nothing. He wondered why, did not know how to fix it, and suspected the quality…

The problem of coating peeling caused by aluminum cutting

In the forum on painted aluminum, there was an article that one of Mr. Brett’s Windows was peeling aluminum foil, while the other window installed at the same time was doing nothing. He wondered why, did not know how to fix it, and suspected the quality of the paint.

A-window-with-peeling-coating
  • A: Use the same color paint to repair it.
  • B:  Is he using a vinyl coated aluminum trim coil, or a painted trim coil. Looks like vinyl coated to me,  and the black roof is just cooking it right off. Could also be a galvanic reaction if its touching pressure treated wood  or a dissimilar metallic or alkali surface.
  • C: Vinyl siding is finished with aluminum, usually sold in rolls. One side is vinyl coated/painted, available in a variety of colours and textures. Therefore, the surface treatment is factory applied. Unfortunately, when cutting the material, it always leaves exposed edges, and if the bonding isn’t perfect, water can seep between the aluminum and the vinyl.

C is right. The peeling is most likely due to the window manufacturer’s failure to protect the cutting edges when cutting aluminum. Air and water get in, causing the coating to peel off.

JINHU coating aluminum coils, chrome-free passivation, inspection standard: the use of corrosive agent friction more than 150 times, do not fade or damage.

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