GB/T 18226-2025Specification for steel component anticorrosion of highway traffic engineering (English PDF)

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 18226-2015 "Technical conditions for corrosion protection of steel components in highway traffic engineering".

In addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Added terms and definitions for highway traffic engineering steel components and zinc-aluminum-magnesium alloy coatings (see 3.1 and 3.8);

b) Changed the following. hot-dip galvanized coating, hot-dip aluminum coating, hot-dip galvanized aluminum alloy coating, hot-dip aluminum-zinc alloy coating, zinc-chromium coating (Dacromet), powder galvanized coating, electrostatic spray polyester coating, fluidized bed plastic coating, hot dip galvanized polyester composite coating, hot dip Galvanized plastic-dip composite coating, hot-dip aluminum-polyester composite coating, hot-dip aluminum-dip plastic-dip composite coating, hot-dip galvanized aluminum alloy polyester composite coating Composite coating, hot dip galvanized aluminum alloy plastic coating, hot dip aluminum zinc alloy polyester composite coating, hot dip aluminum zinc alloy plastic coating Definitions of composite coatings and epoxy zinc-based polyester composite coatings (see 3.2~3.7, 3.9~3.19, 3.1~3.14 of the 2015 edition, March 17 to March 19);

c) The terms and definitions of epoxy zinc-based powder coating and pure polyester powder coating have been deleted (see 3.15 and 3.16 of the 2015 edition);

d) The classification of anti-corrosion coatings has been changed (see Chapter 4, Chapter 4 of the 2015 edition);

e) The general requirements for corrosion protection of steel components have been changed (see Chapter 5, Chapter 5 of the 2015 edition);

f) Changed the hot-dip galvanized coating, hot-dip aluminum coating, electrostatic spray polyester coating, fluidized bed plastic coating, hot-dip galvanized aluminum alloy coating Material technical requirements for coatings, hot-dip aluminum-zinc alloy coatings, and epoxy zinc-based polyester composite coatings (see 6.1.1, 6.2.1, 6.3.1, 6.4.1, 6.9.1, 6.12.1, 6.15.1, and 6.1.1, 6.2.1, 6.3.1, 6.4.1, 6.9.1, 6.12.1, 6.15.1 of the 2015 edition);

g) Changed the hot-dip galvanized coating, hot-dip aluminum coating, electrostatic spray polyester coating, fluidized bed plastic coating, hot-dip galvanized aluminum alloy coating Technical requirements for the appearance quality of coatings, hot-dip aluminum-zinc alloy coatings, and epoxy zinc-based polyester composite coatings (see 6.1.2, 6.2.2, 6.3.2, 6.4.2, 6.9.2, 6.12.2, 6.15.3, and 6.1.3, 6.2.3, 6.3.2, 6.4.2, 6.9.3, 6.12.3, 6.15.5.1 of the 2015 edition);

h) Changed the hot-dip galvanized coating, hot-dip aluminum coating, hot-dip galvanized polyester composite coating, hot-dip galvanized plastic composite coating, hot-dip Aluminum polyester composite coating, hot dip aluminum dip plastic composite coating, hot dip galvanized aluminum alloy coating, hot dip galvanized aluminum alloy polyester composite coating layer, hot dip galvanized aluminum alloy dip plastic composite coating, hot dip aluminum zinc alloy coating, hot dip aluminum zinc alloy polyester composite coating, hot dip Technical requirements for adhesion and thickness of aluminum-zinc alloy plastic-coated composite coatings (see 6.1.3, 6.2.3, 6.5.1, 6.6.1, 6.7.1, 6.8.1, 6.9.3, 6.10.1, 6.11.1, 6.12.3, 6.13.1, 6.14.1, 6.1.2, 6.2.2, 6.5.1, 6.6.1, 6.7.1, 6.8.1 of the 2015 edition, 6.9.2, 6.10.1, 6.11.1, 6.12.2, 6.13.1, 6.14.1);

i) Changed the hot-dip galvanized coating, hot-dip aluminum coating, electrostatic spray polyester coating, fluidized bed plastic coating, hot-dip galvanized aluminum alloy coating Technical requirements for uniformity of hot-dip aluminum-zinc alloy coating (see 6.1.4, 6.2.4, 6.3.4, 6.4.4, 6.9.4, 6.12.4, 2015 Versions 6.1.4, 6.2.4, 6.3.4, 6.4.4, 6.9.4, and 6.12.4);

j) Changed the hot-dip galvanized coating, hot-dip aluminum coating, electrostatic spray polyester coating, fluidized bed plastic coating, hot-dip galvanized aluminum alloy coating Adhesion technical requirements for coatings, hot-dip aluminum-zinc alloy coatings, and epoxy zinc-based polyester composite coatings (see 6.1.5, 6.2.5, 6.3.5, 6.4.5, 6.9.5, 6.12.5, 6.15.5, and 6.1.5, 6.2.5, 6.3.5, 6.4.5, 6.9.5, 6.12.5, 6.15.5.3 of the 2015 edition);

k) Changes to the anti-bending performance technology of hot-dip galvanized coating, hot-dip aluminum coating, electrostatic spray polyester coating, and fluidized bed plastic coating Requirements (see 6.1.6, 6.2.6, 6.3.6, 6.4.6, and 6.1.6, 6.2.6, 6.3.6, 6.4.6 of the 2015 edition);

l) Changed the hot-dip galvanized coating, hot-dip aluminum coating, electrostatic spray polyester coating, fluidized bed plastic coating, hot-dip galvanized aluminum alloy coating Technical requirements for salt spray corrosion resistance of hot-dip aluminum-zinc alloy coatings (see 6.1.7, 6.2.7, 6.3.10, 6.4.10, 6.9.6, 6.12.6, 6.1.7, 6.2.7, 6.3.10, 6.4.10, 6.9.6, and 6.12.6 of the 2015 edition);

m) Modified the thickness technical requirements for electrostatic spray polyester coating, fluidized bed dipping coating, and epoxy zinc-based polyester composite coating (see 6.3.3, 6.4.3, 6.15.4, and 6.3.3, 6.4.3, 6.15.5.2 of the 2015 edition);

n) Changed the technical requirements for wear resistance of electrostatic spray polyester coating, fluidized bed dipping coating, and epoxy zinc-based polyester composite coating (see 6.3.7, 6.4.7, 6.15.6, and 6.3.7, 6.4.7, 6.15.5.6 of the 2015 edition);

o) Changed the technical requirements for impact resistance of electrostatic spray polyester coating, fluidized bed dipping coating, and epoxy zinc-based polyester composite coating (see 6.3.8, 6.4.8, 6.15.7, and 6.3.8, 6.4.8, 6.15.5.7 of the 2015 edition);

p) Changed the chemical solvent corrosion resistance performance of electrostatic spray polyester coating, fluidized bed dipping coating, and epoxy zinc-based polyester composite coating.

Technical requirements (see 6.3.9, 6.4.9, 6.15.8, 6.3.9, 6.4.9, 6.15.5.8 of the 2015 edition);

q) Changed the weather resistance (xenon arc light source) of electrostatic spray polyester coating, fluidized bed dipping coating, and epoxy zinc-based polyester composite coating.

Technical requirements (see 6.3.11, 6.4.11, 6.15.11, and 6.3.12, 6.4.13, and 6.15.5.13 of the 2015 edition);

r) Modified the technical requirements for moisture and heat resistance of electrostatic spray polyester coating and fluidized bed dipping coating (see 6.3.12, 6.4.12, 2015 Version 6.3.11, 6.4.11);

s) Added technical requirements for low-temperature resistance of electrostatically sprayed polyester coatings and fluidized bed dipping coatings (see 6.3.13 and 6.4.13);

t) Deleted the technical requirements and test methods for low temperature embrittlement resistance of fluidized bed plastic dipping coating (see 6.4.12, 2015 edition) 7.16);

u) Changed the hot-dip galvanized polyester composite coating, hot-dip galvanized plastic composite coating, hot-dip aluminum-coated polyester composite coating, hot-dip aluminum-coated Plastic composite coating, hot dip galvanized aluminum alloy polyester composite coating, hot dip galvanized aluminum alloy dip plastic composite coating, hot dip aluminum zinc alloy Technical requirements for inner and outer coatings of polyester composite coatings and hot-dip aluminum-zinc alloy plastic-coated composite coatings (see 6.5.2, 6.5.3, 6.6.2, 6.6.3, 6.7.2, 6.7.3, 6.8.2, 6.8.3, 6.10.2, 6.10.3, 6.11.2, 6.11.3, 6.13.2, 6.13.3, 6.14.2, 6.14.3, 2015 version 6.5.2, 6.5.3, 6.6.2, 6.6.3, 6.7.2, 6.7.3, 6.8.2, 6.8.3, 6.10.2, 6.10.3, 6.11.2, 6.11.3, 6.13.2, 6.13.3, 6.14.2, 6.14.3);

v) Deleted the hot-dip galvanized polyester composite coating, hot-dip galvanized plastic composite coating, hot-dip aluminum-coated polyester composite coating, hot-dip aluminum-coated Plastic composite coating, hot dip galvanized aluminum alloy polyester composite coating, hot dip galvanized aluminum alloy dip plastic composite coating, hot dip aluminum zinc alloy Technical requirements and test methods for temperature alternating resistance of polyester composite coatings and hot-dip aluminum-zinc alloy plastic-coated composite coatings (see 2015 edition (6.5.4, 6.6.4, 6.7.4, 6.8.4, 6.10.4, 6.11.4, 6.13.4, 6.14.4, 7.18);

w) Changed the cyclic salt spray resistance of hot-dip aluminum-coated polyester composite coating, hot-dip aluminum-coated plastic composite coating, and epoxy zinc-based polyester composite coating Corrosion performance technical requirements (see 6.7.4, 6.8.4, 6.15.10, and 6.7.5, 6.8.5, and 6.15.5.10 of the 2015 edition);

x) The technical requirements for epoxy zinc-based coatings have been deleted (see 6.15.4 of the 2015 edition);

y) Deleted the technical requirements for wet adhesion, bending resistance and heat and humidity resistance of epoxy zinc-based polyester composite coating (see the 2015 edition 6.15.5.4, 6.15.5.5, 6.15.5.11);

z) Modified the technical requirements for cathodic stripping resistance and low temperature resistance of epoxy zinc-based polyester composite coatings (see 6.15.9, 6.15.13, 2015 Edition, 6.15.5.9 and 6.15.5.12);

aa) Added technical requirements and test methods for hot water immersion resistance of epoxy zinc-based polyester composite coatings (see 6.15.12 and 7.17);

ab) Modified the technical requirements for zinc-chromium coating (Dacromet) (see 6.16, 6.16 of the 2015 edition);

ac) The technical requirements for powder galvanized coating have been changed (see 6.17, 6.17 of the 2015 edition);

ad) Added technical requirements for zinc-aluminum-magnesium alloy coatings (see 6.18);

ae) The preparation of test specimens, materials, appearance quality, thickness of single coatings and total thickness of composite coatings on steel substrates, delamination method, Conversion method, adhesion, uniformity of zinc-containing metal coatings, uniformity of non-metallic coatings, uniformity of hot-dip aluminum coatings, metal Coating adhesion, dipping coating adhesion, wear resistance, impact resistance, chemical solvent corrosion resistance, and cathodic disbonding resistance Energy, non-metallic coating salt spray corrosion resistance, cyclic salt spray corrosion resistance, weather resistance (xenon arc light source), heat and humidity resistance, Low temperature performance, zinc chromium coating (Dacromet) test method (see 7.1, 7.2, 7.3, 7.4.1, 7.4.2.2, 7.4.3, 7.5, 7.6.1, 7.6.2, 7.6.3, 7.7.1, 7.7.2.1, 7.9, 7.10, 7.11, 7.12, 7.13.2, 7.14, 7.15, 7.16, 7.18, 7.20, 2015 version of 7.1, 7.2, 7.3, 7.4.1, 7.4.2.2, 7.4.3, 7.5, 7.6.1, 7.6.2, 7.6.3, 7.7.1, 7.7.2.1, 7.9, 7.10, 7.11, 7.7.4, 7.12, July 14, July 19, July 15, July 17, July 20);

af) Added the selection of composite coating thickness method with metal inner layer, eddy current method, adhesion of other non-metallic coatings, non-metallic coatings Test methods for bending resistance of metal coatings, salt spray corrosion resistance of composite coatings, and resistance to natural exposure (see 7.4.2.1, 7.4.2.3, 7.7.2.2, 7.8.2, 7.13.3, 7.19);

ag) Deleted the microscope method, the cross-cut test method for polyester coatings, the adhesion of epoxy zinc-based polyester composite coatings, and the bending resistance of plastic dip coatings.

Bend performance test method (see 7.4.2.1, 7.7.2.2, 7.7.3, 7.8.1 of the 2015 edition);

ah) Added other steel structure anti-corrosion coating performance requirements and test methods, metal coating adhesion test method (see Appendix A, Appendix D);

ai) Changed the hot-dip aluminum coating adhesion test method, hot-dip aluminum coating uniformity test method, and cathodic peeling resistance test method.

Methods (see Appendix B, Appendix C, Appendix E, and Appendix A, Appendix B, and Appendix C of the 2015 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 is proposed and coordinated by the National Technical Committee for Standardization of Transportation Engineering Facilities (Highway) (SAC/TC223).

This document was drafted by: Highway Research Institute of the Ministry of Transport, Zhonglu High-Tech Traffic Inspection and Certification Co., Ltd., Anhui Provincial Transportation Planning and Design Research Institute Co., Ltd., Beijing Jiao Ke Highway Survey and Design Institute Co., Ltd., China Railway Changjiang Transportation Design Group Co., Ltd.

Company, Beijing CCCC Huaan Technology Co., Ltd., Sichuan Highway Planning, Survey and Design Institute Co., Ltd., Anhui Expressway Test and Inspection Co., Ltd.

Testing Research Center Co., Ltd., Xuzhou Zhengling Coating Engineering Technology Research Center, Weifang Dongfang Steel Pipe Co., Ltd., Jiangsu Guoqiang Transportation Group Co., Ltd. Limited Company.

The main drafters of this document are: Tang Chengcheng, Guo Donghua, Yang Manjuan, Xu Xin, Ge Shufang, Yu Yedong, Zhou Zhiwei, Zhu Xiaofeng, Yao Yao, Zhou Haifeng, Han Yue, Wang Chenghu, Ye Yuxia, Yin Dongsheng, Du Kun, Liu Xiaohui, Ren Tao, Wang Gui, Zhao Yong, Lu Dongfang, Li Letuan, and Pan Shiqiang.

The previous versions of this document and the documents it replaces are as follows.

— First published as GB/T 18226-2000 in 2000 and first revised in 2015;

— This is the second revision.

1 Scope

This document specifies the classification, general requirements, technical requirements and test methods of anti-corrosion coatings for corrosion protection of steel structures in highway traffic engineering.

This document applies to the corrosion protection of steel components in highway traffic engineering projects.

2 Normative references

GB/T 470-2008

GB/T 1196-2023

GB/T 1630.1

GB/T 1732

GB/T 1740

GB/T 1768

GB/T 1839

GB/T 4956

GB/T 9286

GB/T 10125

GB/T 11547

GB/T 18684-2002

GB/T 22040

GB/T 24514

GB/T 26035

GB/T 31586.2

3 Terms and Definitions

The following terms and definitions apply to this document.