Hot dip galvanizing not only outperforms paint coatings for the service life of corrosion protection for steel structures, often the upfront costs are cheaper and the total life cycle cost benefits are significant. For example, in a C4 Corrosion Zone or a Highly Corrosive Environment, HDG has an expected service life of 20-40 years, compared to a 10-15 years of service life for epoxy high build paints.
In addition to direct maintenance costs associated with surface preparation and re-application of paint, further indirect costs apply, i.e. site accessibility, loss of productivity during maintenance, energy to transport labour and materials to site, along with particulate emissions caused by surface preparation blasting.
This comparative table highlights the upfront and service life cost benefits of HDG compared to a range of primary paint coatings for steel.