Hot dipped galvanized G90 or G60

What is hot dipped galvanized G90 or G60?

Steel sheets are galvanized to protect it from rusting.

There are 3 terms here which needs to be explained before we get the meaning of the whole phrase “hot dipped galvanized G90” or “hot dipped galvanized G60”.

  • G90 or G60
  • Galvanized
  • Hot dipped


hot dip steel sheetThe easiest to explain is the term G90.  G90 is not a galvanizing specification. 90 signifies the quantity of the Zinc coating on the steel sheet. G90 designates a coating of 0.90 oz/square foot. This weight is the total weight of Zinc on both sides of the sheet, i.e.0.45 oz/square foot on each side.

There are other thickness of coating, G140 which designates 1.40 oz/square foot, G60 which designates 0.30 oz/square foot. For a high moisture environment G90 galvanized sheet is recommended.


According to Wikipedia of the meaning of galvanization is:

Galvanization, or galvanization, (galvanizing as it is most commonly called in that industry), is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc.

Hot dipped

galvanized wallZinc is the metal used in the galvanizing process steel or iron. Steel sheet is immersed into molten zinc at a temperature of around 850 0F, where the sheet and zinc metallurgical reacts to form zinc-iron intermetalic layers.
The process leaves a coating of zinc on top of the sheet. Zinc is more reactive than iron. Zinc coated sheets when exposed to the atmosphere, the Oxygen in the air reacts with Zinc  to form zinc oxide, which again reacts with carbon-dioxide in the air to form zinc carbonate which protects the steel underneath from further corrosion.

Other Methods of Rust Proofing the Steel – Electrolysis.

Where are the Galvanized Steel Used?

Galvanized steel is used where steel or iron is used and needs protection from rusting. For instance:

  • Wall ornaments
  • Door and window hoods
  • Decorative formed shingles
  • Roof ornaments
  • Hot-dipped galvanized steel nails
  • Sheet metal for flashing, and gutters and downspouts and pools

The steel walled pools such as the Splash Pools use galvanized steel as the walls and the vertical support of the pool.

Splash Pools Round Deluxe Pool Package, 18-Feet by 52-Inch

Please read our full review of the Splash Pools here.

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