Thanks for the replies. I am aware of zinc toxicity and only do this outdoors with proper PPE. This is indeed a 'home science experiment' attempting to replicate some work done in the early 20th century by Russian scientist Oleg Vladimirovich Losev who discovered some principles of solid...
I'm looking to identify the black spots that are created when galvanized sheet metal (HVAC duct material) is heated to 600-800 degrees C (medium cherry). As the metal is heated sparks fly off the surface and white powderey residue remains, which I assume is zinc oxide as it turns yellow when...
