I am a bit of a chef, 1968 to present
Old makes:
Sabatier (French)
Gustav Emilern (Swiss)
Granton (British - they are the scalloped edge knives)
Victorinox (Swiss)
More modern:
Swibo (colour coded plastic handles)
Modern Day:
Global (Japanese one piece knife. Very hard steel)
Porsche (Similar to Global, but German and 'designer' shaped)
Wustoff (German - hollow ground blades)
Kai (Japanese, also made<?> marketed by Kershaw USA) Damascus steel.
I have examples of all of the above apart from Porsche and Wusthoff. My absolute favourites are my Kai Santoku, 12" carbon steel Sabatier, 18" Granton slicer, and Global fish filleting knife.
Not sure what you mean by 'what kinds of materials are coated normally on edge of kitchen knives'? Kitchen knives don't have coated blades. They need to be sharpened on a regular basis with a stone and a sharpening steel to maintain the sharp edge required, so any coating would come off. If anything did come off the blade, that would be considered a health hazard.
Hope that helps. Why do you ask?
Edited to add, why do I have this feeling that there are going to be knives coming from Korea marked 'Porsche' or 'Global'.