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Characteristics of Galvanized Surfaces Seven Diamonds Industries co.
 Catalogue of Seven Diamonds (920 KB)
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 Three factors including: Hardness, Ductility, and Adherence combine to give galvanized coatings unmatched resistance to damage by corrosion or rough handling.
Hardness : Each layer of the galvanized surface is characterized by a measure of hardness called the
Diamond Pyramid Number (DPN). The higher DPN give us the greater the hardness.
Typically, the Gamma, Zeta, and Delta layers are harder than the underlying steel. This
provides excellent resistance to damage from abrasion.
Ductility : The Etta layer of the galvanized coating is quite ductile, or pliable, adding to the coating's
abrasion resistance.
Adherence : A galvanized coating is adherent to the underlying steel at several thousand pounds per
square inch (psi) .Other coatings typically offer adhesion rated at several hundred "psi" at
best.
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