In China, the standard for hot-dip galvanizing is outlined in GB/T 13912-2020, which specifies the requirements and test methods for hot-dip galvanized coatings on fabricated iron and steel articles. This standard is based on ISO 1461:2009 but includes modifications to suit local technical conditions and industry practices.
Table of Contents
The key elements of GB/T 13912-2020 include:
Scope and Applicability:
This standard covers hot-dip galvanized coatings on fabricated iron and steel articles, excluding products like continuously galvanized sheet, wire, and tube.
Coating Requirements:
Specifications for the appearance, thickness, and adhesion of the galvanized coating are detailed. The standard also includes guidelines for the renovation of uncoated or damaged areas and defines the criteria for acceptance.
Testing Methods:
Various testing methods for coating thickness, adhesion, and corrosion resistance are specified. Methods include magnetic measurement for coating thickness and procedures for sampling and acceptance.
Safety and Compliance:
The standard outlines safety requirements and the information that must be provided by the purchaser, such as the specifications of the base metal and details of the hot-dip galvanizing process.
Documentation: It requires the issuance of a certificate of compliance, detailing the results of the tests conducted and confirming adherence to the specified requirements (Chinese Standard) (GNEE Steel).
For more detailed information, you can refer to the full text of the standard available through official channels such as the Standardization Administration of China or relevant industry publications.