HOT DIPPED GALVANIZED GATES & FENCE
Gates we use steel for the construction of our driveway
gates, and fence. We chose steel
for its durability and strength.
We then give the gate a Hot
Dipped Galvanized (HDG) undercoat. The HDG process
utilize the properties of Zinc to provide protection
to the steel from rust
During the Hot Dip Galvanizing, the gate or fence undergoes
a 12 step process cleaning and preparing the steel,
dipping the frame in various chemical baths,
painting, and curing. One of the steps is to dip the gate
in a Molten Zinc Bath. (In order to fully protect
the steel both inside and out, any gate that is called "corrosion
resistant" should be dipped, not painted.)
Hot Dip Galvanizing
The HDG undercoat
protection to the steel substrate,
which is especially
important in coastal
or other wet environments.
Our Hot Dipped Galvanized finish
has been tested by immersion in saltwater for 1500
hours and another 1500 hours of salt air fog with no
base steel corrosion.
We provide a Lifetime Warranty on the steel substrate of our HDG gates.
Read below for detailed information
on the Hot Dipped Galvanizing process.
Hot Dipped Galvanizing Process
American Galvanizer's Association
The fundamental steps in the galvanizing
Soil and grease removal - A hot alkaline
dirt, oil, grease, shop oil, and soluble markings.
Pickling - Dilute solutions of either
hydrochloric or sulfuric
acid remove surface rust and mill scale to provide
a chemically clean metallic surface.
Fluxing - Steel is immersed in liquid flux
a zinc ammonium chloride solution) to remove oxides and
to prevent oxidation prior to dipping into the molten
zinc bath. In the dry galvanizing process, the item is
separately dipped in a liquid flux bath, removed, allowed
to dry, and then galvanized. In the wet galvanizing process,
the flux floats atop the molten zinc and the item passes
through the flux immediately prior to galvanizing.
Galvanizing - The
article is immersed in a bath of molten zinc at between
815-850 F (435-455 C). During galvanizing,
the zinc metallurgically bonds to the steel, creating
a series of highly abrasion-resistant zinc-iron alloy
layers, commonly topped by a layer of impact-resistant
Finishing - After the steel is withdrawn
from the galvanizing
bath, excess zinc is removed by draining, vibrating or
- for small items - centrifuging. The galvanized item
is then air-cooled or quenched in liquid.
Inspection - Coating-thickness
and surface-condition inspections complete the process.
The galvanizing process
has existed for more than 250 years and has been a mainstay
of North American industry since the 1890s. Galvanizing
is used throughout various markets to provide steel with
unmatched protection from the ravages of corrosion. A
wide range of steel products from nails to highway guardrail
to the Brooklyn Bridge's suspension wires to NASA's launch
pad sound suppression system benefit from galvanizing's
superior corrosion prevention properties.
Galvanizing's primary component is zinc. This vital
substance is silvery blue-gray in color and makes up
an estimated 0.004% of the earths crust and ranks 25th
in order of abundance. It is essential for the growth
and development of almost all life: Between 1.4 and 2.3
grams of zinc are found in the average adult, and the
World Health Organization has recommended a daily intake
of 15 milligrams. Numerous consumer products including
cold remedies, sunscreens, diaper creams, and nutritional
supplements contain beneficial amounts of zinc, primarily
in the form of zinc oxide.
Even though galvanized steel is blue-gray, it also is
green. The zinc and galvanizing industries work to promote
sustainable development by enhancing zinc's contribution
to society and ensuring that its production and use are
in harmony with the natural environment and the needs
of society, now and in the future.
Zinc, as it is used in galvanizing,
is a healthy metal, completely recyclable. The energy
used to melt zinc is
inversely related to the amount of zinc recycled. Galvanizing
delivers incredible value in terms of protecting our
infrastructure. Less steel is consumed and fewer raw
materials are needed because galvanizing makes bridges,
roads, buildings, etc., last longer.