Hot Dip Galvanising - Protective Coating Advantages

Hot Dip Galvanising - Protective Coating Advantages
Hot Dip Galvanising - Protective Coating Advantages
Hot Dip Galvanising - Protective Coating Advantages
Hot Dip Galvanising - Protective Coating Advantages

Galserv® are hot dip galvanising experts and have been providing quality protective coating for 50 years. Our experience tells us that hot dip galvanising is the best protective coating solution available.

Why hot dip galvanising is the best protective coating!

Zinc is very successful as a protective coating for steel and ferrous materials because in most environments to which steel will be subjected, zinc will act as the anode; i.e. it will corrode in preference to the steel. In simplistic terms, while there is zinc on the surface the steel will be protected from corrosion.

The life expectancy of zinc coatings is independent of the coating process - an equivalent coating of zinc will provide the same life expectancy regardless of the coating process. Hot dip galvanising can provide over 80 microns of zinc coating depending on material thickness, while zinc electroplates are normally less than 25 microns for similar material thickness.

Advantages of galvanising

  • For most classes of steelwork, galvanising may provide the lowest long-term cost. In many cases galvanising may also provide lowest initial cost.
  • The galvanised coating becomes part of the steel surface it protects.
  • The metallurgical structure of the galvanised coating provides good toughness and resistance to mechanical damage in transport, erection and service.
  • The galvanised coating is subject to corrosion at a predictably slow rate, between 1/17th and 1/8th that of steel, depending on the environment to which it is exposed.
  • Zinc's anodic protection for steel ensures that small areas of the base steel exposed through severe impacts or abrasion are protected from corrosion by the surrounding galvanised coating.
  • During galvanising, the work is completely immersed in molten zinc and the entire surface is coated, even recesses and returns, which often cannot be coated using other processes. Internal surfaces of vessels and containers are coated simultaneously.
  • Galvanising is a highly versatile process. Items ranging from small fasteners and threaded components, up to major structural members can all be coated.
  • Galvanising provides outstanding corrosion performance in a wide range of environments.
  • Duplex coatings of galvanising-plus-paint are often the most economical solution to the problem of protecting steel in highly corrosive environments. Such systems provide a synergistic effect in which the life of the combined coatings exceeds the total life of the two coatings if they were used alone.

The GAA - Galvanizers Association Australia - provide an extensive collection of information on Hot Dip Galvanizing and the benefits of this as a protective coating.

Galserv Galvanising Services are active members of the GAA.