The Benefits
Galvanizing is a term often used to describe zinc coatings in general. But, different types of zinc coatings vary in coating thickness and other characteristics and it is important to understand that all zinc coatings are not the same.
Hot dip galvanizing has many benefits for the specifier:
Corrosion resistance
Galvanized coatings protect steel in three ways:
  1. The zinc weathers at a very slow rate giving a long and predictable life.
  2. The coating corrodes preferentially to provide sacrificial protection to small areas of steel exposed through drilling, cutting or accidental damage.
  3. If the damaged area is larger, sacrificial protection prevents sideways creep which can undermine coatings.
Coating toughness
Galvanizing is unique. The process produces a coating which is bonded metallurgically to the steel.
Complete coverage
All parts of the surface of the steelwork are coated- external, internal, awkward corners and areas with narrow gaps.
Specified to a single standard
BS EN ISO 1461.
Speed of application
Can be applied in minutes
Faster construction
No site surface preparation is necessary
Lowest lifetime cost
Competitive initial cost and long life make hot dip galvanizing the most versatile, economic method of protecting steelwork.
Long life
Often exceeding 40 years
Ease of Inspection
The nature of the process is such that if the coating looks continuous and sound, it is so.
Competitive first cost
For many applications the cost is lower than alternative coatings.
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