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GB/T 33630-2025Wind energy generation systems - Specification for corrosion protection of offshore wind turbines (English PDF)

风能发电系统　海上风力发电机组防腐规范

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 31, 2025

Implementation date

May 1, 2026

Scope

GB/T 33630-2025 is the English-translated version of 风能发电系统　海上风力发电机组防腐规范.

GB/T 33630-2025 is the Chinese standard "Wind energy generation systems - Specification for corrosion protection of offshore wind turbines".

Its scope clause reads: This document specifies the general requirements for offshore wind turbine generator sets, corrosion environment control, steel components, composite material parts, and electrical equipment.

Protection, maintenance, and inspection of group storage. This document applies to the corrosion protection design, construction, acceptance, and storage of horizontal axis offshore wind turbine generator sets (hereinafter referred to as "generator sets") and their components. and operation and maintenance.

This document does not apply to structures below the tower of offshore wind turbine generators.

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Document preview — GB/T 33630-2025

National Standard of the People's Republic of China

ICS: 27.180
Classification: F 11
Replacing: GB/T 33630-2017

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.General Requirements
4.1 Corrosive Environment
4.2 Overall Corrosion Prevention Measures
5.Corrosive Environment Control 4.
5.1 Measures
5.2 Requirement
6.Protection of steel components
6.1 Measures
6.2 Surface Treatment
6.3 Coating Protection
6.4 Thermal spray metal protection
6.5 Hot-dip galvanizing protection
6.6 Composite coating protection
7 Protection of Composite Material Components
7.1 Blade Protection
7.2 Protection of the nacelle canopy and fairing
8.Protection of electrical equipment
8.1 Measure
8.2 Requirement
9.Protection of Unit Storage
10 Maintenance and Inspection
Appendix A (Normative) Corrosion Rate Testing
References

1 Scope

This document specifies the general requirements for offshore wind turbine generator sets, corrosion environment control, steel components, composite material parts, and electrical equipment.

Protection, maintenance, and inspection of group storage.

This document applies to the corrosion protection design, construction, acceptance, and storage of horizontal axis offshore wind turbine generator sets (hereinafter referred to as "generator sets") and their components.

and operation and maintenance.

This document does not apply to structures below the tower of offshore wind turbine generators.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 470 Zinc Ingots

GB/T 1732 Test method for impact resistance of paint film

GB/T 1733 Test method for water resistance of paint film

GB/T 1740 Test method for resistance to damp heat of paint film

GB/T 1766 Rating Method for Aging of Paint and Varnish Coatings

GB/T 1768 Determination of abrasion resistance of paints and varnishes - Rotating rubber grinding wheel method

GB/T 1865 Paints and varnishes - Artificial weathering and artificial radiation exposure - Filtered xenon arc radiation

GB/T 2423.4 Environmental testing of electrical and electronic products - Part 2.Test methods - Test Db - Alternating damp heat (12h 12h cycle)

GB/T 2423.16 Environmental Testing - Part 2.Test Methods - Test J and Guidelines. Mold Growth

GB/T 2423.18 Environmental testing - Part 2.Test methods - Test Kb - Salt spray, alternating (sodium chloride solution)

GB/T 2694 Technical Requirements for the Manufacturing of Transmission Line Towers

GB/T 4208 Degrees of protection provided by enclosures (IP code)

GB/T 5210 Paints and varnishes - Pull-off adhesion test

GB/T 5267.4 Surface treatment of fasteners - Passivation treatment of corrosion-resistant stainless steel

GB/T 6742 Paints and varnishes - Bending test (cylindrical shaft)

GB/T 8923.1 Visual assessment of surface cleanliness of steel before coating - Part 1.Uncoated steel

Rust level and treatment level of steel surface after complete removal of original coating.

GB/T 8923.3 Visual assessment of surface cleanliness of steel surfaces before coating - Part 3.Welds, edges and others

Treatment level of surface defects in the area

GB/T 9258.3 Abrasive particle size analysis for coated abrasives - Part 3.Determination of particle size composition of micro powders P240~P2500

GB/T 9274 Determination of resistance to liquid media for paints and varnishes

GB/T 9278 Temperature and humidity for conditioning and testing of coating specimens

GB/T 9793-2012 Thermal spraying of metals and other inorganic coatings, zinc, aluminum and their alloys

GB/T 10125 Corrosion test under artificial atmosphere - Salt spray test

GB/T 25387.1 | GB/T 25388.1 | GB/T 25389.1 | GB/T 33628 | GB/T 33629 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 25 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

Editions of GB/T 33630

Edition	Title	Revision	Status
GB/T 33630-2025	Wind energy generation systems - Specification for corrosion protection of offshore wind turbines	current edition	Current
GB/T 33630-2017	Offshore wind turbine generator systems -- Specification for corrosion protection	previous edition	In force

This page sells the current edition, GB/T 33630-2025. Earlier editions are listed for reference only.

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