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GB/T 4948-2025: Sacrificial anode of aluminum alloy
Status: Valid GB/T 4948: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 4948-2025 | English | 539 |
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Sacrificial anode of aluminum alloy
| Valid |
GB/T 4948-2025
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| GB/T 4948-2002 | English | 449 |
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Sacrificial anode of Al-Zn-In series alloy
| Valid |
GB/T 4948-2002
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| GB/T 4948-1985 | English | 679 |
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Sacrificial anode of Al-Zn-In system alloy
| Obsolete |
GB/T 4948-1985
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PDF similar to GB/T 4948-2025
Standard similar to GB/T 4948-2025 GB/T 5270 GB/T 4955 GB/T 4957 GB/T 4950 Basic data | Standard ID | GB/T 4948-2025 (GB/T4948-2025) | | Description (Translated English) | Sacrificial anode of aluminum alloy | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A29 | | Classification of International Standard | 47.020.05 | | Word Count Estimation | 26,225 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-08-01 | | Older Standard (superseded by this standard) | GB/T 4948-2002 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 4948-2025: Sacrificial anode of aluminum alloy---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 47.020.05
CCSA29
National Standard of the People's Republic of China
Replace GB/T 4948-2002
Aluminum alloy sacrificial anode
Released on 2025-04-25
2025-08-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Symbols 2
5 Classification, model and specification 2
6 Requirement 15
7 Test methods 17
8 Inspection rules 18
9 Marking, packaging, transportation and storage 20
Appendix A (Normative) Long-term test method for electrochemical performance of sacrificial anode 21
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 4948-2002 "Aluminum-zinc-indium alloy sacrificial anodes". Compared with GB/T 4948-2002, except for the structural adjustment
In addition to the integration and editorial changes, the main technical changes are as follows.
a) The applicable scope of aluminum anodes has been changed (see Chapter 1, Chapter 1 of the.2002 edition);
b) Added a chapter on "Symbols" (see Chapter 4);
c) The classification method of aluminum anodes has been changed (see 5.1, 4.1 of the.2002 edition);
d) The model representation method of aluminum anodes has been changed (see 5.2, 4.2 of the.2002 edition);
e) Added the structural types and parameters of bolted aluminum anodes for liquid tanks (see Table 7 and Figure 6);
f) Added the structure type and parameters of bracelet-type aluminum anode for pipelines (see Table 14 and Figure 12);
g) The raw material composition requirements for aluminum anodes have been changed (see 6.1, 5.1 of the.2002 edition);
h) The chemical composition and electrochemical performance requirements of the three aluminum anodes have been changed (see 6.2 and 6.3, 5.2 and 5.3 of the.2002 edition);
i) Added the surface cold insulation requirements for aluminum anodes (see 6.4.4);
j) Changed the surface treatment requirements for aluminum anode iron feet (see 6.5.2, 5.5.2 of the.2002 edition);
k) The dimensional deviation requirements for aluminum anodes have been changed (see 6.7.2, 5.7.2 of the.2002 edition);
l) Added requirements and test methods for internal defects of aluminum anodes (see 6.8 and 7.7);
m) The number of samples and requirements for aluminum anode inspection have been changed (see 8.2.3 and 8.3.4, 7.2.3 and 7.2.4 of the.2002 edition);
n) The method for determining the contact resistance between the sacrificial anode body and the iron pin has been deleted (see Appendix A of the.2002 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed and coordinated by the National Technical Committee for Standardization of Marine Vessels (SAC/TC12).
This document was drafted by. Luoyang Ship Materials Research Institute (725th Institute of China Shipbuilding Industry Corporation).
The main drafters of this document are. Ma Li, Sun Mingxian, Zhang Haibing, Zhao Yongtao, Li Weili, Xing Shaohua, Zhang Yihan, Wang Hongren, Lin Cunguo, Xu Likun,
Zheng Guohua, Liu Zhaohui, Liu Guangyi, Yan Yonggui, and Qu Benwen.
This document was first issued in 1985, revised for the first time in.2002, and this is the second revision.
Aluminum alloy sacrificial anode
1 Scope
This document specifies the classification, model and specification, requirements, test methods and inspection rules of aluminum alloy sacrificial anode (hereinafter referred to as "aluminum anode").
As well as marking, packaging, transportation and storage.
This document is applicable to corrosive media such as seawater, fresh water (resistivity not exceeding 500Ω·cm), sea mud, seabed sand and gravel, and produced water from oil and gas fields
Design, production and application of aluminum anodes for cathodic protection in industrial fields such as ships, port and marine engineering facilities, seawater cooling water systems, storage tanks and pipelines
The design, production and inspection of aluminum anodes for cathodic protection of other steel structures can be used as a reference.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 470-2008 Zinc ingot
GB/T 700 Carbon structural steel
GB/T 712 Structural steel for ships and marine engineering
GB/T 728-2020 Tin Ingot
GB/T 1196-2023 Aluminium ingots for remelting
GB 1499.1 Steel for reinforced concrete Part 1.Hot rolled plain round bars
GB 1499.2 Steel for reinforced concrete Part 2.Hot rolled ribbed steel bars
GB/T 3499-2023 Primary magnesium ingot
GB/T 4949 Chemical analysis method for sacrificial anodes of aluminum-zinc-indium alloys
GB/T 4950-2021 Zinc alloy sacrificial anode
GB/T 7999 Photoelectric direct reading emission spectroscopy analysis method for aluminum and aluminum alloys
GB/T 8923.1-2011 Surface preparation of steel materials before coating - Visual assessment of surface cleanliness - Part 1.Uncoated
The rust level and treatment level of the steel surface after the original coating is completely removed
GB/T 17395 Steel pipe dimensions, shape, weight and allowable deviation
GB/T 17848 Test method for electrochemical performance of sacrificial anode
GB/T 27677-2017 Aluminum Master Alloys
YS/T 257-2009 Indium Ingot
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
The actual amount of electricity consumed per unit mass of sacrificial anode is measured.
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