Zinc is the 24th most abundant element in the Earth's crust. The most common mined ore is "sphalerite", a zinc sulfide product.
Reference: Metal Castings
Metalplate produces hot-dip galvanized coatings in compliance with either ASTM specification A-123 (structural material) or A-153 (smaller items that require centrifuging). If you will provide us with a specific environment or location, we can utilize the vast amount of product life data available to us to give you an accurate estimate of your project's expected service life.
Metalplate is pleased to offer a summary of the most commonly used specifications: specs.pdf
Copies of these ASTM Specifications can be obtained below: