Possible pitting corrosion on a kitchen applience made of die cast aluminum

[gokhant]

Hello everyone,

I bought a stand mixer one year ago and put it in my kitchen countertop. So, this happened on the coating or casing. there are dark brown color spots all around the casing of mixer. Even, one of them bleed near to the power control switch (photo 2). The body is made of die cast aluminum. I suppose it's pitting corrosion but i am not sure. It seems that there's a transparent thin top layer and these spots are formed up under this layer. it's not possible to wipe out these small spots and bleed spot. Anyway, i didn't try with strong chemicals yet. Just used it for 4 or 5 times and cleaned with damp cloth and then with dry one. There is definitely no moisture where the mixer is standing.

do you have any idea what's going on with this coating or body material ? Again i have checked the mechanism of pitting corrosion but couldn't be sure. It might be related to the coating as well.

P.S. i do apologies if this subject is out of forum rules and please let me know if so.

Photo 1

Photo 2

Photo 3

 

[bimr]

The manufacturer states that this product is made from die cast metal, not necessarily aluminum. Where did you get the idea that it is manufactured from aluminum?

You pictures do not have enough pixels to see the pitting that you describe.

It appears that whatever coating the manufacturer is using is not suitable for the intended uses and/ is failing. Have you run this idea past the manufacturer? It would appear to be a warranty issue.

The part may not have been properly cleaned prior to coating. If there were still traces of oil/grease on the part when it was coated, the coating will fail.

 

[Compositepro]

The appliance appears to be powder coated, and there are spots in the coating. Powder coating over-spray gets recycled from the dust collector and it is easy for this material to get contaminated. This contamination may not be visible at first, but it may change color with time and exposure cleaning agents.