Mysterious white deposits on the radiator
At the inlet and outlet of the last radiator in the chain, white, almost crystal-shaped deposits were found in the inner part that was not covered by the black coating. Each of the individual threaded inserts was covered with white crystals in the first few turns, including the unused outlets that were closed with a plug. But only there.
This is exactly what I wanted to take a closer look at with an (unfortunately not very good) endoscope, because the mechanical vibrations when cutting open the chamber would certainly have damaged or even destroyed the fine structures. The radiator is made of solid copper, only the corroded threaded inserts are not. We can also see that the channels of the radiator are clean and not clogged. But where does the white coating come from?
Take another look at the jetplate, but this time stitched at 20x magnification. You would expect to see a nickel-plated metal plate, but no… Incidentally, there are also thread-like molecular chains here, which can be easily seen with the naked eye. But they have nothing to do with the white coating.
The jetplate and the cover plate in the acrylic are made of the same material. They are stamped components and have such sharp edges that you can easily cut yourself on them. Anyone with a little knowledge will know that stainless steel should only be processed with great care and that not every tool is equally suitable in terms of material, as there will always be residues of this material on the surface of the end product. Let’s first take a look at what these two components of the radiator are made of and get a fright! It is chrome-nickel steel, which has not even been nickel-plated to save costs. The only stupid thing is that such a thing can of course take bitter revenge.
What the bare stainless steel has to do with the white coating also needs to be investigated in more detail and a little more theory later on.
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