Different metal materials are used in coating industry. The following is a comparison among them
| Items | Stainless Steel (SUS) | Galvanized Steel (GS) | Aluminized Steel (AS) |
| Composition | Fe/10%Cr alloy | Steel coated with Zn | Steel coated with Al/Zn/Si alloy; Silicon enhances the adhesion of the coating |
| Mechanical Strength | Strongest and most durable | less | less |
| Corrosion | No rust | Rust-resistant; but zinc coating will break down within 10 to 15 years of element exposure (ref) | Less prone to rusting; last a few decades; two to four times the life span of traditional galvanized metal. (ref) |
| Thermal conductivity | Higher than SUS | ||
| Thermal expansion | higher than AS | Less than SUS | |
| Electrostatic | No | No | comes with electrostatic surface |
| Bacteria-resistant | Yes | No | No |
| Appearance | aesthetics | have a matte finish | |
| Cost | High | less | less |
| Applications | water heaters, ranges, furnaces, space heaters and grills, kitchen utensils, cookware, storage tanks, construction industry | body parts of trucks and buses; build houses; washing machine; computer parts | High temperature; high corrosion resistance areas; Exhaust systems and mufflers (because of electrostatic); incinerators, ovens, heaters, kitchen ranges, and barbeque burners |
References
1) https://www.mststeel.com/difference-aluminized-steel-stainless-steel/
2) https://www.slotdrainsystems.com/difference-between-galvanized-and-stainless-steel#:~:text=Galvanized%20steel%20is%20steel%20that,as%20well%20as%20bacteria%2Dresistant.
3) Reference 3