SY/T 0407-2024 Specification of steel surface preparation before application of paint English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
E
Professional standard of the People's Republic of China
SY/T 0026.1-2024
Replaces SY/T 0026-1999
Specification of steel surface preparation before application of paint
涂装前钢材表面处理规范
(English Translation)
Issue date: 2024-09-24 Implementation date: 2025-03-24
Issued by National Development and Reform Commission, P.R.C
Contents
1General provisions
2Terms
3Basic requirements
4Before surface preparation
4.1Condition evaluation of the surface to be prepared
4.2Selection of the preparation method and determination of preparation grade
4.3 Procedure qualification test
5 Preparation requirements
5.1General regulation
5.2Cleaning
5.3Tools derusting
5.4Dry spray derusting
5.5Wet spray derusting
5.6High-pressure water derusting
5.7Pickling
6 Assessment of the prepared surface
Explanation of wording in this code
List of quoted standards
Addition : Explanation of provisions
Specification of steel surface preparation before application of paint
1 General Provisions
1.0.1 This specification is formulated to standardize the technical requirements for the surface preparation of steel substrates before painting.
1.0.2 This specification is applicable to the determination, implementation, and assessment of methods for the surface preparation of steel substrates before painting.
1.0.3 In addition to complying with this specification, the surface preparation of steel substrates before painting should also comply with the current relevant national standards and specifications.
2 Terms
2.0.1
Water jet cleaning
A surface preparation method that uses a high-velocity stream of water directed onto the steel surface.
2.0.2
Stripping
A surface cleaning method that uses strippers, alkaline cleaners, etc., to clean the steel surface.
2.0.3
Flame cleaning
A surface cleaning method that uses a flame to heat and remove oil, grease, mill scale, and rust from the steel surface.
2.0.4
Wet spray derusting
A rust removal method that involves projecting a mixture of clean water and abrasive onto the steel surface.
2.0.5
High-pressure water derusting
A rust removal method that involves projecting clean water at a pressure above 70 MPa onto the steel surface.
3 Basic Requirements
3.0.1 Before surface preparation of steel, the condition of the surface to be treated shall be assessed, and the required surface preparation quality and the surface preparation method shall be selected. It is advisable to compile a surface preparation procedure specification or work instructions through process qualification tests.
3.0.2 The quality of surface preparation, such as the preparation grade and profile depth, shall comply with the technical standards for the coating or the requirements of the design documents.
3.0.3 The assessment of the rust grade or initial surface condition of the steel, the preparation grade, and the flash rust grade shall comply with the provisions of the current national standard GB/T 8923, "Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness."
3.0.4 Surface preparation operations shall be carried out according to the construction procedure specification or work instructions. After surface preparation, the quality of the prepared surface shall be assessed. If the prepared surface does not meet the specified quality requirements or if the condition of the prepared surface subsequently changes, it shall be re-prepared until it meets the surface preparation quality requirements.
3.0.5 Solvents, cleaning agents, chemicals, abrasives, etc., used for surface preparation should be environmentally friendly products. They shall be accompanied by a certificate of conformance and a quality certificate. Their storage, handling, and use shall comply with relevant national, industrial, and manufacturer's regulations.
4 Preparation Before Surface Treatment
4.1 Assessment of the Condition of the Surface to be Treated
4.1.1 Before determining the specific surface treatment method and preparation grade, information about the surface to be coated shall be collected, and the surface condition shall be assessed.
4.1.2 The information to be collected and the surface condition assessment shall include, but are not limited to, the following:
1 Type and thickness of the steel. The steel type includes material, shape, color, and any special treatment information that may affect surface preparation.
2 The worst rust grade and related information, assessed according to the current national standard GB/T 8923.1, "Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings."
3 The type, condition, and service life of the existing protective coating system on painted surfaces.
4 Information concerning other contaminants, such as chemical or water-soluble salts.
4.2 Selection of Surface Preparation Method and Determination of Grade
4.2.1 The selection of the surface preparation method shall consider the following factors:
1 The condition of the surface to be treated.
2 The feasibility of the proposed method regarding operational conditions, hygiene, safety, environmental conditions, and work schedule.
3 The extent of the surface preparation required.
4 The required surface preparation quality, including the preparation grade to be achieved, anchor profile depth, and removal of water-soluble contaminants.
5 The intended protective coating system.
The selection of tool derusting, dry blasting (abrasive blasting) derusting, and wet spray derusting methods should be carried out according to the provisions of the current national standard GB/T 18839, "Preparation of steel substrates before application of paints and related products — Surface preparation methods." High-pressure water derusting and pickling methods are generally not suitable for the surface preparation of steel substrates requiring an anchor profile depth.
4.2.3 The determination of the surface preparation grade shall consider the following factors:
1 The condition of the surface to be treated.
2 The extent of the surface preparation required.
3 The feasibility of the surface preparation method.
4 The intended protective coating system.
5 Economic considerations.
SY/T 0407-2024, SY 0407-2024, SYT 0407-2024, SY/T0407-2024, SY/T 0407, SY/T0407, SY0407-2024, SY 0407, SY0407, SYT0407-2024, SYT 0407, SYT0407
Introduction of SY/T 0407-2024
SY/T 0407-2024 Specification of steel surface preparation before application of paint English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
E
Professional standard of the People's Republic of China
SY/T 0026.1-2024
Replaces SY/T 0026-1999
Specification of steel surface preparation before application of paint
涂装前钢材表面处理规范
(English Translation)
Issue date: 2024-09-24 Implementation date: 2025-03-24
Issued by National Development and Reform Commission, P.R.C
Contents
1General provisions
2Terms
3Basic requirements
4Before surface preparation
4.1Condition evaluation of the surface to be prepared
4.2Selection of the preparation method and determination of preparation grade
4.3 Procedure qualification test
5 Preparation requirements
5.1General regulation
5.2Cleaning
5.3Tools derusting
5.4Dry spray derusting
5.5Wet spray derusting
5.6High-pressure water derusting
5.7Pickling
6 Assessment of the prepared surface
Explanation of wording in this code
List of quoted standards
Addition : Explanation of provisions
Specification of steel surface preparation before application of paint
1 General Provisions
1.0.1 This specification is formulated to standardize the technical requirements for the surface preparation of steel substrates before painting.
1.0.2 This specification is applicable to the determination, implementation, and assessment of methods for the surface preparation of steel substrates before painting.
1.0.3 In addition to complying with this specification, the surface preparation of steel substrates before painting should also comply with the current relevant national standards and specifications.
2 Terms
2.0.1
Water jet cleaning
A surface preparation method that uses a high-velocity stream of water directed onto the steel surface.
2.0.2
Stripping
A surface cleaning method that uses strippers, alkaline cleaners, etc., to clean the steel surface.
2.0.3
Flame cleaning
A surface cleaning method that uses a flame to heat and remove oil, grease, mill scale, and rust from the steel surface.
2.0.4
Wet spray derusting
A rust removal method that involves projecting a mixture of clean water and abrasive onto the steel surface.
2.0.5
High-pressure water derusting
A rust removal method that involves projecting clean water at a pressure above 70 MPa onto the steel surface.
3 Basic Requirements
3.0.1 Before surface preparation of steel, the condition of the surface to be treated shall be assessed, and the required surface preparation quality and the surface preparation method shall be selected. It is advisable to compile a surface preparation procedure specification or work instructions through process qualification tests.
3.0.2 The quality of surface preparation, such as the preparation grade and profile depth, shall comply with the technical standards for the coating or the requirements of the design documents.
3.0.3 The assessment of the rust grade or initial surface condition of the steel, the preparation grade, and the flash rust grade shall comply with the provisions of the current national standard GB/T 8923, "Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness."
3.0.4 Surface preparation operations shall be carried out according to the construction procedure specification or work instructions. After surface preparation, the quality of the prepared surface shall be assessed. If the prepared surface does not meet the specified quality requirements or if the condition of the prepared surface subsequently changes, it shall be re-prepared until it meets the surface preparation quality requirements.
3.0.5 Solvents, cleaning agents, chemicals, abrasives, etc., used for surface preparation should be environmentally friendly products. They shall be accompanied by a certificate of conformance and a quality certificate. Their storage, handling, and use shall comply with relevant national, industrial, and manufacturer's regulations.
4 Preparation Before Surface Treatment
4.1 Assessment of the Condition of the Surface to be Treated
4.1.1 Before determining the specific surface treatment method and preparation grade, information about the surface to be coated shall be collected, and the surface condition shall be assessed.
4.1.2 The information to be collected and the surface condition assessment shall include, but are not limited to, the following:
1 Type and thickness of the steel. The steel type includes material, shape, color, and any special treatment information that may affect surface preparation.
2 The worst rust grade and related information, assessed according to the current national standard GB/T 8923.1, "Preparation of steel substrates before application of paints and related products — Visual assessment of surface cleanliness — Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings."
3 The type, condition, and service life of the existing protective coating system on painted surfaces.
4 Information concerning other contaminants, such as chemical or water-soluble salts.
4.2 Selection of Surface Preparation Method and Determination of Grade
4.2.1 The selection of the surface preparation method shall consider the following factors:
1 The condition of the surface to be treated.
2 The feasibility of the proposed method regarding operational conditions, hygiene, safety, environmental conditions, and work schedule.
3 The extent of the surface preparation required.
4 The required surface preparation quality, including the preparation grade to be achieved, anchor profile depth, and removal of water-soluble contaminants.
5 The intended protective coating system.
The selection of tool derusting, dry blasting (abrasive blasting) derusting, and wet spray derusting methods should be carried out according to the provisions of the current national standard GB/T 18839, "Preparation of steel substrates before application of paints and related products — Surface preparation methods." High-pressure water derusting and pickling methods are generally not suitable for the surface preparation of steel substrates requiring an anchor profile depth.
4.2.3 The determination of the surface preparation grade shall consider the following factors:
1 The condition of the surface to be treated.
2 The extent of the surface preparation required.
3 The feasibility of the surface preparation method.
4 The intended protective coating system.
5 Economic considerations.
