Differences and Similarities between ASTM A153 and ASTM A123: Hot Dip Galvanizing Standards

In the metal product industry, hot-dip galvanizing is a common anti-corrosion process. ASTM A153 and ASTM A123 are two main standards that regulate the requirements and procedures for hot-dip galvanizing. This article will introduce the similarities and differences between these two standards to help industry practitioners better understand the differences between them.

Hot dip galvanizing plays a crucial role in the manufacturing of metal products. ASTM A153 and ASTM A123 are two commonly used standards used to guide the specifications and requirements for the hot-dip galvanizing process. Although they all focus on providing corrosion resistance protection, there are some differences in details and applications.


Hot dip galvanizing process: Both ASTM A153 and ASTM A123 involve immersing metal products in molten zinc to form a zinc coating and provide corrosion resistance protection.
Corrosion resistance: Both standards are committed to providing corrosion resistance, extending the lifespan of metal products, and protecting them from external environmental influences.


1.Application scope:

ASTM A153 is usually applicable to steel products, such as corroded angle steel, steel pipes, etc.; ASTM A123 is more widely applicable to iron and steel products, including forgings, castings, and other specific types of steel products.

2.Coating thickness requirements:

ASTM A153 and ASTM A123 have different thickness requirements for galvanized coatings. Generally speaking, A123 requires a thicker zinc coating to provide a higher degree of corrosion protection.

3.Measurement methods and testing standards:

There are also some differences between ASTM A153 and ASTM A123 in terms of testing methods and standards. These tests typically involve the appearance, adhesion, and coating thickness of the coating.
3.Understanding the differences between these standards is crucial for manufacturers and consumers. The correct selection of appropriate standards can ensure effective corrosion protection for metal products, extend their service life, and reduce maintenance costs.

Although both ASTM A153 and ASTM A123 aim to provide standards for hot-dip galvanizing, understanding their respective characteristics and scope of application can help industry professionals choose appropriate standards more wisely, ensuring the required anti-corrosion performance and quality.

Understanding these two standards can help the industry better understand their application in anti-corrosion treatment of metal products and promote the development of the metal product industry towards a more efficient and sustainable direction.

The above are some main similarities and differences between ASTM A153 and ASTM A123 standards. We hope this can help you better understand the characteristics of these two hot-dip galvanized standards.

The above content is for reference only, please strictly follow relevant standards in specific applications.

This article aims to briefly introduce the similarities and differences between ASTM A153 and ASTM A123 hot-dip galvanizing standards, in order to help readers better understand their characteristics and applicability.

Post time: Nov-09-2023