304 Stainless Steel And Galvanized Steel In Wet Equipment
Equipment that meets mist, cleaning liquid and warm air many times a day is only as durable as the metal it is made from.
304 Stainless Steel
Grade 304 is the most widely used stainless steel. It contains roughly 18 percent chromium and 8 percent nickel. The chromium forms a thin, invisible oxide layer on the surface that protects the metal underneath and repairs itself when scratched.
This makes 304 well suited to parts that are repeatedly wet and need to be wiped clean, which is why it is standard in food equipment and commercial kitchens. In a helmet cleaning machine it is the natural choice for the treatment chamber.
Galvanized Steel
Galvanized steel is carbon steel coated with zinc. The zinc shields the steel from moisture, and where the coating is scratched it corrodes in preference to the steel beneath, continuing to protect it. It offers good rigidity and corrosion resistance at a lower cost than stainless steel, which makes it a sound material for an outer cabinet.
Plain Carbon Steel
Uncoated or painted carbon steel relies entirely on its paint. Once the paint is chipped or the edge of a panel is exposed, moisture reaches the steel and rust spreads underneath the coating.
Why Thickness Matters
Sheet thickness affects how rigid a cabinet is, how well doors stay aligned and how it stands up to transport and public use. A 1.5 mm sheet is noticeably stiffer than a 1.0 to 1.2 mm sheet of the same material.
Key Takeaways
- 304 stainless steel protects itself with a chromium oxide layer.
- Galvanized steel is protected by a zinc coating.
- Painted carbon steel rusts once the paint is breached.
- Thicker sheet gives a stiffer, longer-lasting cabinet.
See How HelmetSani Does It
The HelmetSani Smart Helmet Cleaning & Disinfection Machine atomizes, sanitizes and dries a helmet in 3 minutes.