ISO 1461-Hot-dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods

The standard name of ISO 1461 is "Hot-dip galvanized coatings on fabricated iron and steel articles – Specifications and test methods". Below is a detailed introduction to the standard:

Scope:
Applies to hot-dip galvanized coatings applied by immersing fabricated iron and steel articles (including certain castings) in a molten zinc bath containing not more than 2% of other metals. It does not cover continuously hot-dip galvanized sheet, wire, or woven or welded mesh products; tubular products processed in automated plants; or galvanized products with specific standards that may include additional or differing requirements (e.g., fasteners).

Standard Content:

1. General Requirements:

   • Specifies the composition of the galvanizing bath, which is primarily composed of molten zinc. Total impurity content (excluding iron and tin) is limited.

2. Acceptance Inspection and Sampling:

   • Defines procedures for conducting acceptance inspections on galvanized products, including sampling methods and rules.

3. Galvanized Coating Properties:

   • Appearance Requirements: Specifies the acceptable visual condition of the coating.

   • Thickness Requirements: Provides different thickness specifications for steel products of varying thicknesses.

   • Repair Requirements: Guidelines for repairing uncoated or damaged areas.

   • Adhesion Requirements: Ensures coating adhesion to the substrate.

   • Acceptance Criteria: Clear qualification criteria for coating thickness, appearance, adhesion, and other properties.

4. Test Methods:

   • Describes methods to verify compliance with the standard, such as:

     • Microscopic cross-section method for thickness measurement.

     • Reference method to determine thickness via mass per unit area.

     • Other procedures to evaluate coating quality and adherence to specifications.

This standard ensures the quality, durability, and performance of hot-dip galvanized coatings on iron and steel products through rigorous specifications and testing protocols.

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