GB/T 1839-2025 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered.
ICS 77.040.99
CCS H21
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 1839-2025
Replaces GB/T 1839-2008
Test Method for Gravimetric Determination of the Mass per Unit Area of Galvanized Coatings on Steel Products
Issued on 2025-08-29
Implemented on 2026-03-01
Issued by
State Administration for Market Regulation
Standardization Administration of China
CONTENTS
1 Scope
2 Normative References
3 Terms, Definitions and Symbols
4 Test Specimens
5 Gravimetric Method
6 X-ray Fluorescence Method
7 Selection of Test Methods
8 Reproducibility
9 Test Report
1 Scope
This document specifies the principles, test solutions, specimens, method selection, procedures, result calculation, reproducibility, and test reporting for determining the mass of zinc coatings per unit area on steel products.
This document applies to pure zinc coatings, zinc-iron alloy coatings, zinc-magnesium alloy coatings, zinc-aluminum-magnesium alloy coatings, aluminum-zinc alloy coatings, and aluminum-zinc-magnesium alloy coatings.
Other coating types such as aluminum-silicon alloy coatings may refer to this document.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 8170 Rules for rounding off numerical values and expression and judgment of limiting values
3 Terms and Definitions
No terms and definitions need to be defined in this document.
4 Test Specimens
4.1 Sampling locations, positions, and quantities shall comply with relevant product standards or agreements.
4.2 The test area shall be selected according to coating thickness to meet weighing accuracy requirements.
4.3 Avoid surface scratches when cutting specimens. Specimens with obvious local damage shall not be used.
4.4 For steel plates and strips, specimens may be circular or square. For arbitration tests, the single-side area shall not be less than 1,500.0 mm².
4.5 For steel wires, specimen length shall be cut according to Table 1.
Table 1 Steel Wire Specimen Cutting Requirements
(Unit: mm)
| Wire Diameter | Specimen Length |
4.6 For other galvanized steel products, specimens may be circular, square, tubular, or irregular shapes, with an area not less than 2,000.0 mm².
4.7 For irregular galvanized products, the total test area shall be measured according to Appendix A or calculated theoretically.
Standard
GB/T 1839-2025 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products (English Version)
Standard No.
GB/T 1839-2025
Status
to be valid
Language
English
File Format
PDF
Word Count
8500 words
Price(USD)
255.0
Implemented on
2026-3-1
Delivery
via email in 1~3 business day
Detail of GB/T 1839-2025
Standard No.
GB/T 1839-2025
English Name
Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products
GB/T 1839-2025 Test method for gravimetric determination of the mass per unit area of galvanized coatings on steel products English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered.
ICS 77.040.99
CCS H21
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 1839-2025
Replaces GB/T 1839-2008
Test Method for Gravimetric Determination of the Mass per Unit Area of Galvanized Coatings on Steel Products
Issued on 2025-08-29
Implemented on 2026-03-01
Issued by
State Administration for Market Regulation
Standardization Administration of China
CONTENTS
1 Scope
2 Normative References
3 Terms, Definitions and Symbols
4 Test Specimens
5 Gravimetric Method
6 X-ray Fluorescence Method
7 Selection of Test Methods
8 Reproducibility
9 Test Report
1 Scope
This document specifies the principles, test solutions, specimens, method selection, procedures, result calculation, reproducibility, and test reporting for determining the mass of zinc coatings per unit area on steel products.
This document applies to pure zinc coatings, zinc-iron alloy coatings, zinc-magnesium alloy coatings, zinc-aluminum-magnesium alloy coatings, aluminum-zinc alloy coatings, and aluminum-zinc-magnesium alloy coatings.
Other coating types such as aluminum-silicon alloy coatings may refer to this document.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 8170 Rules for rounding off numerical values and expression and judgment of limiting values
3 Terms and Definitions
No terms and definitions need to be defined in this document.
4 Test Specimens
4.1 Sampling locations, positions, and quantities shall comply with relevant product standards or agreements.
4.2 The test area shall be selected according to coating thickness to meet weighing accuracy requirements.
4.3 Avoid surface scratches when cutting specimens. Specimens with obvious local damage shall not be used.
4.4 For steel plates and strips, specimens may be circular or square. For arbitration tests, the single-side area shall not be less than 1,500.0 mm².
4.5 For steel wires, specimen length shall be cut according to Table 1.
Table 1 Steel Wire Specimen Cutting Requirements
(Unit: mm)
| Wire Diameter | Specimen Length |
4.6 For other galvanized steel products, specimens may be circular, square, tubular, or irregular shapes, with an area not less than 2,000.0 mm².
4.7 For irregular galvanized products, the total test area shall be measured according to Appendix A or calculated theoretically.
