Technical code for anticorrosion of offshore wind farm steel structures
1 Scope
This standard specifies the surface pretreatment, the common anticorrosion methods such as coating protection, thermal spraying metal protection and cathodic protection, and their related technical requirements for offshore wind farm steel structures (mainly including fixed steel support structures of wind turbine generator system and transformer substation).
This standard is applicable to the anticorrosion design, construction, acceptance, operation and maintenance of offshore wind farm steel structures.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1740 Determination of resistance to heat and humidity of paint films
GB/T 1771 Paints and varnishes - Determination of resistance to neutral salt spray (fog)
GB/T 1865 Paints and varnishes - Artificial weathering and exposure to artificial radiation - Exposure to filtered xenon-arc radiation
GB/T 4948 Sacrificial anode of Al-Zn-In system alloy
GB/T 4949 Chemical analysis methods for sacrificial anodes of AL-Zn-In system alloy
GB/T 4950 Sacrificial anode of Zn-Al-Cd alloy
GB/T 4951 Chemical analysis methods for sacrificial anodes of Zn-Al-Cd alloy
GB/T 4956 Non-magnetic coatings on magnetic substrates - Measurement of coating thickness - Magnetic method
GB/T 5210 Paints and varnishes - Pull-off test for adhesion
GB/T 6462 Metallic and oxide coatings - Measurement of coating thickness - Microscopical method
GB 6514 Safety code for painting - Safety, ventilation and air clean-up for painting process
GB/T 7387 Technical requirements for marine reference electrode
GB/T 7388 Technical requirements for marine auxiliary anode
GB/T 7788 General specification for anodic shield coating of ship and ocean engineering
GB 8923 Rust grades and preparation grades of steel surfaces before application of paints and related products
GB/T 9274 Paints and varnishes - Determination of resistance to liquids
GB/T 10610 Geometrical product specifications (GPS) - Surface texture: Profile method - Rules and procedures for the assessment of surface texture
GB 11375 Metallic and other inorganic coatings - Thermal spraying - Safe practices
GB/T 12608 Thermal spraying - Wires，rods and cords for flame and arc spraying - Classification and technical supply condition
GB 12942 Safety code for painting - Technical requirements of safety for working in confined spaces
GB/T 13288 The assessment of profile grades of steel surface before application of paint and related products - Comparator
GB/T 13748 Chemical analysis methods of magnesium and magnesium alloys
GB/T 17731 Magnesium alloy sacrificial anode
GB/T 17848 Test methods for electrochemical properties of sacrificial anodes
GB/T 17850.1 Preparation of steel substrates before application of paints and related products - Specifications for non-metallic blast-cleaning abrasives - General introduction and classification
GB/T 18570.3 Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 3: Assessment of dust on steel surface prepared for painting (pressure-sensitive tape method)
GB/T 18570.6 Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 6: Extraction of soluble contaminants for analysis - The Bresle method
GB/T 18570.10 Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 10: Field method for the titrimetric determination of water-soluble chloride
GB/T 18838.1 Preparation of steel substrates before application of paints and related products - Specifications for metallic blast-cleaning abrasives - General introduction and classification
GB/T 19824 Thermal spraying - Approval testing of thermal sprayers
ISO 16276-1 Corrosion protection of steel structures by protective paint systems - Assessment of, and acceptance criteria for, the adhesion/cohesion (fracture strength) of a coating - Part 1: Pull-off testing
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
offshore wind farm
power station constructed in a marine environment, consisting of a batch of wind turbine generator systems or groups of wind turbine generator systems
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 General
5 Anticorrosion measures
6 Anticorrosion requirements
7 Test and acceptance
Annex A (Informative) Calculation of dew point
Annex B (Informative) Calculation of common protection current density of uncoated steel and protection current density of coated steel
Annex C (Informative) Calculation formulae of cathodic protection design
Annex D (Informative) Test method for adhesive strength of thermal spraying coat
