GalvanizeIt! Online Seminar

Galvanizing Standards

There are certain specifications that have been developed for hot-dip galvanizing in order to produce a high-quality coating. The most commonly used specifications design engineers and fabricators should become familiar with in order to promote a high-quality coating and ensure their steel design is suitable for hot-dip galvanizing are:

  • ASTM A 123/A 123M: Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
    Single pieces of steel or fabrications with different types of steel products
  • ASTM A 153/A 153M: Standard Specification for Zinc Coating (Hot-Dip) on Iron and Hardware
    Fasteners and small products that are centrifuged after galvanizing to remove excess zinc
  • ASTM A 767/A 767M: Standard Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement
    Reinforcing steel or rebar
  • ASTM A 780: Standard Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
    Touch-up procedures for coating bare spots on an existing hot-dip galvanized product

Other commonly used specifications in the hot-dip galvanizing industry include:

  • ASTM A 143/A 143M: Standard Practice for Safeguarding Against Embrittlement of Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting Embrittlement
  • ASTM A 384/A 384M: Standard Practice for Safeguarding Against Warpage and Distortion During Hot-Dip Galvanizing of Steel Assemblies
  • ASTM A 385/A 385M: Standard Practice for Providing High-Quality Zinc Coatings (Hot-Dip)
  • ASTM B 6: Standard Specification for Zinc
  • ASTM D 6386: Standard Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Product and Hardware Surfaces for Paint
  • ASTM E 376: Standard Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (Electromagnetic) Examination Methods
  • CAN/CSA G 164: Hot-Dip Galvanizing of Irregularly Shaped Articles
  • ISO 1461 Hot-Dip Galvanized Coatings on Fabricated Iron and Steel Assemblies
    Specifications and Test Methods

Let’s examine a few of these specifications in more detail.