Logo de Corbec Ontario
 
 
 

HOT-DIP GALVANIZING COATING SPECIFICATIONS

Governing specifications for hot-dip galvanized steel

The following documents are not available on our website. However, you can contact the American Society for Testing and Materials (ASTM).


A 123/A 123M-02
Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
A143/A 143M-03
Practice for Safeguarding Against Embrittlement of Hot-Dip Galvanized Structural Steel Products and Procedure for Detecting Embrittlement
A 153-05 153M-03
Specification for Zinc Coating on Iron and Steel Hardware
A 384/A 384M-02
Practice for Safeguarding Against Warpage and Distortion During Hot-Dip Galvanizing of Steel Assemblies
A 385-05
Practice for Providing High-Quality Zinc Coatings (Hot-Dip)
A 767-05 767M-00b
Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement
A 780-01
Practice for Repair of Damaged and Uncoated Area of Hot-Dip Galvanized Coatings
B 6-0
Specification for Zinc
D 6386-99
Practice for Preparation of Zinc (Hot-Dip Galvanized) Coated Iron and Steel Products and hardware Surfaces for Painting
E 376-03
Practice for Measuring Coating Thickness by Magnetic Field or Eddy-Current Exam Method
CAN/CSA G 164-M92
Hot-Dip Galvanizing of Irregular Shaped Products

Technical specifications

Understanding the characteristics and performance of hot-dip galvanized steel will facilitate and increase the specification of the coating in applications where galvanizing will enhance the project.


STEEL SELECTION

The selection of which kind of steel is dependent on the type of coating required or preferred. Generally, galvanized coatings are chosen for their anti-corrosive properties, not for their appearance.


The following four principle properties of the steel selected can negatively affect the galvanized coating.


  1. Carbon in excess of about 0.25%.
  2. Silicon in the range of 0.04% to 0.15% or above 0.22% can produce galvanized coating growth rates much higher than those for steels with silicon levels below 0.04% and between 0.15% and 0.22%.
  3. Phosphorus in excess of 0.04%.
  4. Manganese in excess of about 1.3%.

We would be happy to discuss this with you in greater detail.