Increase the useful life of public metal structures

Majority of the public infra-structures are supported by metals and only a handfuls are constructed with wood. Except for some types of woods ability to weather heat of the sun and the water of the rain, most of the woods plus metals including stainless steel degenerate with time. Painting is only a defensive coat. Corrosion starts when the coat of paint is damaged. Once the coat of paint is damaged, water is retained, and soon bulk rust creeps underneath the film and the mixture of rust and water further accelerates the degeneration of the metal. Even highest grade of stainless steel rust after a say 500 hundred hours of continuous salt-spray test.

A zinc-iron alloy coating bonded to the base metal by hot dip galvanizing resist abrasion, works reliable longer. The metal is assured of its original quality through age, and the process free the public repeats of short-term maintenance costs. Protect steel structures against rust by hot dip galvanizing.

Usually, painted structures require re-painting every 5 to 10 years while hot dip galvanizing do not require another galvanizing and this means that costs is a one-off initial cost.

In normal environmental conditions, hot dip galvanizing increases the useful life of metal since the corrosion rate is reduced by between 10 to 30 times.

If metal durability is not prolonged, other alternatives would replace metal as a preferred building material in future in term of costs.