Physical, no chemical reaction is occuring, your just covering the Iron with paint, the paint doesn't react with the iron.
Galvanized Sheet Metal
It is a physical change because it is still a sheet of paper.
If the sheet is turning into a pillowcase, it would be a physical change. The sheet is not changing anything but its shape to become a pillowcase, and it most likely can be reversed to turn back into a sheet.
It is a physical change because it has not changed its chemical composition.
A GV flat sheet is a flat sheet of galvanized steel.
These are chemical reactions (changes).
The difference between the GI sheet galvanized and mild sheet steel is the gauged used. The other difference is the materials used and the galvanization aspect.
Physical one.
Galvanized steel: 18 W/m K You can check out the resources here below
Dog pee is very corrosive, even to galvanized sheet metal. Dog pee will take the zinc coating right off of your sheet metal. It should be painted to avoid this.
The torn sheet has undergone a physical change, the burned sheet has undergone a chemical change, and the crumpled sheet has undergone a physical change.
Galavanized sheets