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Zinc Coated Unistrut

Zinc Coated UnistrutWhen design engineers and plant managers are facing highly corrosive environments, they often specify Unistrut with a zinc coating.

Unistrut with a zinc coating can provide resistance to acids, salt, and other environmental factors that would cause uncoated Unistrut Channel to rust.Unistrut products are available in three types of zinc coatings:

  • Electroplated
  • Pregalvanized
  • Hot Dip Galvanized

 A Zinc finish for Unistrut Channel offer two types of protection:Barrier: The zinc coating protects the steel substrate from direct contact with the environment.Sacrificial: The zinc coating will protect scratches, cut edges, etc. through an anodic sacrificial process.The service life of a zinc finish is directly related to the zinc coating thickness as shown below. Comparison of Zinc Galvanized Finishes

  • Hot Dip Galvanized 2.6 MIL
  • Pregalvanized .75 MIL
  • Electro-Galvanized .2 to .5 MIL
  • Perma-Gold .5 MIL


As shown in the graph, when the zinc coating is double, the service life is double under most conditions.  For more information on what zinc coated is best for your Unistrut application, contact Unistrut Service Company of Ohio today.