GB/T 33803-2017 Technical Specification for the Application of Rust Inhibitors for Reinforced Concrete GB/T33803-2017 |tt||Standard compression package decompression password: www.bzxz.net
This standard specifies the terms and definitions, product classification, basic requirements, environmental corrosion classification, technical requirements, design application, acceptance and maintenance of the application of corrosion inhibitors for reinforced concrete. ? This standard is applicable to new construction and repair of reinforced concrete projects. ?

ICS25.220.99
National Standard of the People's Republic of China
GB/T33803—2017
Technical specification for application of reinforced concrete anti-corrosion inhibitor2017-05-31Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
Implementation on 2017-12-01
Normative reference documents
Terms and definitions
Product classification
Basic requirements
Environmental corrosion classification
Technical requirements for steel bar inhibitors
Design and application of steel bar inhibitors
Acceptance and maintenance
Appendix Appendix A (Normative Appendix)
Brine immersion test
Appendix B (Normative Appendix)
Electrochemical comprehensive evaluation test
Appendix C (Normative Appendix)
Appendix D (Normative Appendix)
Appendix E (Normative Appendix)
Appendix F (Normative Appendix)
Mortar specimen dry-wet cold-hot cycle test
Detection and evaluation of steel bar rust resistance in on-site concrete components Environmental corrosion grade
Rebar corrosion area percentage detection
GB/T33803—2017
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This standard was drafted in accordance with the rules given in GB/T1.1-2009. This standard was proposed by the China Petroleum and Chemical Industry Federation. This standard is under the jurisdiction of the National Technical Committee for Anti-corrosion Standardization (SAC/TC381). GB/T33803—2017
This standard was drafted by China Metallurgical Construction Research Institute Co., Ltd., China International Corrosion Technology Research Institute (Beijing) Co., Ltd., and China Industrial Corrosion Technology Association, and Shandong Longquan Pipeline Engineering Co., Ltd., National Industrial Building Quality and Safety Supervision and Inspection Center, Beijing Gu Ruien Technology Co., Ltd., Beijing New Vision Construction Engineering Technology Co., Ltd., Tsinghua University, Beijing Corrosion and Protection Society, Fujian Blue Ocean Municipal Garden Construction Co., Ltd., Sinopec Engineering Construction Co., Ltd., Fujian Bocheng Construction Engineering Co., Ltd., China Corrosion and Protection Society Construction Engineering Committee, Fujian Huajian Engineering Construction Co., Ltd., and Fujian Jinding Construction Development Co., Ltd. participated in the drafting. The main drafters of this standard are: Wang Donglin, Ren Zhenduo, Zhang Jian, He Ming, Xu Xueping, Wang Wei, Liu Fuyun, Lu Xinying, Wang Xiangmin, Xing Shibo, Huang Zhongxi, Zhang Xuehua, Wan Yu, Shao Zhengming, Ren Enping, Sun Zhaoshuan, Li Wei, Chen Feng, Zhou Wei, Chen Bin, Feng Yin, Yu Juan, Liao Chenghao, Shan Longxin. m
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1 Scope
Technical specification for the application of corrosion inhibitors for reinforced concrete GB/T33803—2017
This standard specifies the terms and definitions, product classification, basic requirements, environmental corrosion classification, technical requirements, design application, acceptance and maintenance of corrosion inhibitors for reinforced concrete. This standard applies to new construction and repair of reinforced concrete projects. 2 Normative reference documents
The following documents are indispensable for the application of this document. For any dated referenced document, only the dated version applies to this document. For any undated referenced document, the latest version (including all amendments) applies to this document. GB8076—2008 Concrete admixtures
GB/T8077 Test method for homogeneity of concrete admixturesGB50021 Geotechnical engineering exploration specification
GB50046 Industrial building anticorrosion design specificationGB/T50476 Concrete structure durability design specificationDL/T5150—2001 Hydraulic concrete test procedureJC/T1011—2006 Concrete anti-sulfate corrosion preservativeYB/T4390-2013 Industrial building (structure) steel structure anticorrosion coating quality inspection and assessment standard 3 Terms and definitions
The following terms and definitions apply to this document. 3.1
Corrosion inhibitor for steel in concreteAn admixture that is added to concrete (or mortar) or applied to the surface of concrete (or mortar) and can prevent or delay the corrosion of steel bars by directly acting on the steel bars in concrete (or mortar). 3.2
Single-function corrosion inhibitor for steel inconcreteAn admixture that prevents or delays the corrosion of steel bars in concrete (or mortar). 3.3
Multifunctional corrosion inhibitor for steel in concreteAn admixture that prevents or delays the corrosion of steel bars in concrete (or mortar) and improves the resistance of concrete (or mortar) to sulfate erosion.
Organic corrosion inhibitor for steel in concreteOrganic corrosion inhibitor for steel in concreteAn admixture that is mainly composed of organic compounds and has the function of preventing or delaying the corrosion of concrete (or mortar). 3.5
Jouter-coating corrosion inhibitorfor steel in concrete
A surface treatment agent that can penetrate into the surrounding of steel bars on the surface of concrete (or mortar) to prevent or delay steel bar corrosion. 1
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GB/T33803—2017
4Product classification
It is divided into single-function steel bar rust inhibitor, multi-function steel bar rust inhibitor, organic steel bar rust inhibitor and external-coating steel bar rust inhibitor. 5 Basic requirements
5.1 According to the use environment, steel bar rust inhibitors should be used in reinforced concrete projects in the following situations: marine environment, including marine atmospheric zone, marine underwater zone, tidal zone, splash zone, freshwater and seawater alternating environment; a)
Saline soil and saline-alkali areas that meet national regulations after field engineering surveys; b
Deicing salt use areas, reinforced concrete roads, bridges, parking lots and other infrastructure that can be affected by deicing salt in winter: rusted reinforced concrete structures, repair and reinforcement projects for reinforced concrete rust damage in structures caused by chlorides and sulfates; d)
Other environments where steel bar rust inhibitors are required. e)
When using steel bar rust inhibitors, the quality of concrete should be ensured not to be affected. 5.2
Under special corrosive environmental conditions, steel bar rust inhibitors can be used simultaneously with other protective measures. 5.3
6 Environmental corrosion classification
The use environment of reinforced concrete structure can be divided into six categories according to the corrosion mechanism of steel bars and concrete, which are determined according to Table 1. Table 1
Environmental corrosion classification
Environmental classification
General environment
Marine environment
Industrial (chloride) environment
Marine industrial (chloride) environment
Geotechnical (chloride salt, sulfate) environment
Deicing salt (chloride) environment
General environment refers to no freeze-thaw effect.
Technical requirements for steel bar rust inhibitor
7.1 The technical indicators of homogeneity of steel bar rust inhibitor shall comply with the provisions of Table 2. Corrosion mechanism
Carbonation of protective layer concrete causes steel corrosionChloride causes steel corrosion
Chloride causes steel corrosion
Chloride causes steel corrosion
Chloride causes steel corrosion, sulfate causes concrete corrosionChloride causes steel corrosion
Table 2 Technical indicators of homogeneity of steel bar rust inhibitor
Test items
Solid content S/%
Water content W/%
Technical indicators
When the manufacturer's control value S>25%, it should be controlled at 0.95S~1.05SWhen the manufacturer's control value S≤25%, it should be controlled at 0.90S~1.10SWhen the manufacturer's control value W>5%, it should be controlled at 0.90W~1.10WWhen the manufacturer's control value W≤5%, it should be controlled at 0.80W~1.20W detection method
GB/T8077
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Test items
Density D/(g/cm2)
Total alkali content/%
Chloride ion content/%
Table 2 (continued)
Technical indicators
When the manufacturer's control value D>1.1g/cm2, it should be controlled within D±0.03When the manufacturer's control value D≤1.1g/cm2, it should be controlled within D±0.02Should be within the manufacturer's control value range
Should be within the manufacturer's control value range
Not exceeding the manufacturer's control value
Not exceeding the manufacturer's control value
The performance technical indicators of the single-function steel bar rust inhibitor shall comply with the provisions of Table 3. Table 3 Rust resistance performance index of monofunctional steel bar rust inhibitor Test items
Brine immersion test
Electrochemical comprehensive test
Dry-wet cold and hot cycle test
Technical index
Rebar bar is free of rust, potential 0mV~-250mV
Current is less than 150μA
The corrosion area of ​​steel bars in mortar with rust inhibitor is reduced by more than 95% compared with that without rust inhibitor. During arbitration test, at least the mortar sample dry-wet cold and hot cycle test items shall be included. 7.3
The rust resistance of organic steel bar rust inhibitor shall comply with the provisions of Table 4. Table 4 Rust resistance performance index of organic steel bar rust inhibitor Test items
Brine immersion test
Dry-wet cold and hot cycle test
Technical index
Rebar bar is rust-free, potential 0mV~-250mV
The corrosion area of ​​steel bars in mortar with rust inhibitor is reduced by more than 95% compared with that without rust inhibitor GB/T33803—2017
Test method
GB/T8077
Test method
Appendix A
Appendix B
Appendix C
Test method
Appendix A
Appendix C
The arbitration test shall at least include the mortar dry-wet cold and hot cycle test. When there is no design requirement for sulfate corrosion resistance, the sulfate corrosion resistance test may not be carried out. wwW.bzxz.Net
7.4 The mechanical properties of concrete mixed with single-functional and organic steel bar rust inhibitors shall comply with the provisions of Table 5. Table 5 Mechanical properties of concrete mixed with single-functional and organic steel bar rust inhibitors Test items
Compressive strength ratio/%
Setting time difference/min
Impermeability
Technical indicators
120~+120
120～+120
7.5 The corrosion resistance performance indicators of multifunctional steel bar rust inhibitors shall comply with the provisions of Table 6. Test method
GB8076
DL/T5150—2001
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Test items
Salt water immersion test
Dry-wet cold and hot cycle test
Sulfate resistance
Corrosion resistance
Corrosion resistance coefficient K
Table 6 Corrosion resistance index of multifunctional steel bar rust inhibitor Technical index
Steel bar has no rust, potential 0mV250mV
The corrosion area of ​​steel bars in mortar with rust inhibitor is reduced by more than 95% compared with that without rust inhibitor
Expansion coefficient E
According to the needs of the project, other properties of concrete should meet the requirements of GB8076—2008 standard. During the arbitration test, at least the mortar dry-wet cold and hot cycle test should be included. Sulfate corrosion resistance test. 7.6 The mechanical properties of concrete mixed with multifunctional steel bar rust inhibitors shall comply with the provisions of Table 7. Table 7 Mechanical properties of concrete mixed with multifunctional steel bar rust inhibitors Test items
Compressive strength ratio/%
Slump
Retention value/mm
Technical indicators
≥100
≥150
≥120
According to the needs of the project, other properties of concrete shall comply with the requirements of GB8076-2008 standard. 7.7 The rust resistance performance indicators of externally coated steel bar rust inhibitors shall comply with the provisions of Table 8. Table 8 Rust resistance performance index of externally coated steel bar rust inhibitor Test items
Dry-wet cold and hot cycle test
On-site test
Technical index
Testing method
Appendix A
Appendix C
JC/T1011—2006
Testing method
GB8076—2008
Testing method
Testing performance index of externally coated steel bar rust inhibitor compared with that of non-externally coated steel bar rust inhibitor The corrosion area of ​​steel bars in the sample is reduced by more than 95%. The degree of steel bar rust prevention in concrete components coated with rust inhibitors meets the requirements of Appendix D. 8
Design and application of steel bar rust inhibitors
Appendix C
Appendix D
8.1 When the amount of chloride ions entering the surface of steel bars in concrete during the design life cannot be determined, the use of single-functional and organic steel bar rust inhibitors should meet the recommended dosage in Table 9. For other rust inhibitor dosages, the dosage is determined by tests based on the environmental corrosivity level. See Appendix E for environmental corrosivity levels.
Environmental classification
Table 9 Recommended dosage of steel bar rust inhibitor
Environmental conditions
Underwater area
Atmospheric area
Tidal area or wave play area
Soil area
Light salt spray area
Heavy salt spray area
Non-hot area
Hot and humid area
Non-dry-wet alternation
Dry-wet alternation
Industrial (chloride) environment| |tt||Marine industry (chloride) environment
Geotechnical environment
Lower chloride ion concentration
Higher chloride ion concentration
High chloride ion concentration, or accumulation of chloride ions caused by alternating dry and wet conditionsGB/T33803—2017
Rust inhibitor dosage/(kg/m)
Refers to the offshore atmospheric zone above 15m above the average water level, and the onshore outdoor environment within 100m to 300m from the high tide coastline. bRefers to the offshore atmospheric zone within 15m above the average water level, and the onshore outdoor environment within 100m from the high tide coastline. The annual average temperature in hot areas is higher than 20℃. dRepeated freezing and thawing environment, frequent deicing salt operations are treated according to higher chloride ion concentration. 8.2 The amount of steel bar rust inhibitor depends on the amount of corrosive media such as chloride salts (measured in chloride ions) on the surface of concrete steel bars during the design life. When the amount of chloride ions on the steel bar surface can be determined, if nitrite rust inhibitors are used, the molar ratio of nitrite ions to chloride ions on the steel bar surface should not be less than 0.6. The dosage of other types of rust inhibitors should be determined according to the manufacturer's recommended dosage and after testing. 8.3 In the case of chloride ions gradually penetrating and diffusing from the concrete surface to the steel bar surface, the amount of chloride ions entering the steel bar surface during the life of the structure can be calculated according to the geological survey data of chloride ions and the concrete design parameters, according to FICK's second diffusion law, and then the dosage of steel bar rust inhibitor can be determined according to the recommended dosage in Table 9.
8.4 For environments where sulfate corrosion and chloride ion corrosion exist at the same time, the dosage of the rust inhibitor should be determined according to the amount of sulfate ions and chloride ions in the corrosive medium and the performance requirements for the construction concrete. When selecting, the performance test in Table 6 should be carried out according to the corrosion environment conditions and construction requirements. Other anti-corrosion measures can also be added. 8.5 Externally coated steel bar rust inhibitors need to be applied according to product performance technical requirements. 9 Acceptance and maintenance
9.1 Acceptance
9.1.1 When the steel bar rust inhibitor is delivered to the site, the product type, product certificate, product instructions, factory inspection report and performance test report shall be checked.
9.1.2 When the steel bar rust inhibitor is delivered to the site, it shall be re-tested according to the product type. Single-functional steel bar rust inhibitor shall be re-tested according to the items specified in 7.2 and 7.4; organic steel bar rust inhibitor shall be re-tested according to the items specified in 7.3 and 7.4; multi-functional steel bar rust inhibitor shall be re-tested according to the items specified in 7.5 and 7.6; external coating steel bar rust inhibitor shall be re-tested according to the items specified in 7.7; if necessary, the relevant homogeneity indicators shall be tested according to the provisions of 7.1, and it can only be used after passing the test. 5
GB/T33803—2017
Inspection quantity: for the same type of steel bar rust inhibitor at the same site, every 50t shall be regarded as an inspection batch, and less than 50t shall be regarded as an inspection batch. Each inspection batch of steel bar rust inhibitor shall be inspected at least once. 9.1.3 Before construction, concrete performance trial mix test shall be carried out in accordance with design requirements. 9.1.4 When adding powder type rust inhibitor, the concrete mixing time shall be appropriately extended to ensure the uniformity of the mixture. 9.1.5 In addition to inspecting the performance of concrete in accordance with relevant standards and design requirements, its rust resistance shall be inspected in accordance with Appendix F. The rust area of ​​steel bars with rust inhibitor shall be reduced by more than 95% compared with that of steel bars without rust inhibitor. 9.1.6 When conditions permit, the degree of corrosion of steel bars in concrete components should be regularly evaluated according to the determination method in Appendix D, and the protective effect of steel bar rust inhibitors on the steel bars in concrete components should be evaluated. 9.2 Maintenance
9.2.1 After the completion and acceptance of reinforced concrete projects using rust inhibitors, a regular inspection, testing and maintenance system should be established. 9.2.2 According to the durability cycle requirements of reinforced concrete structures, the first inspection and evaluation should be carried out after 10 years of use under normal circumstances. As the service life increases, the inspection cycle should be shortened. 9.2.3 The durability inspection items and contents of reinforced concrete structures should be evaluated in accordance with Appendix D. Management personnel should regularly inspect and test the durability of reinforced concrete structures. If problems are found, repair them in a timely manner and keep maintenance records. 9.2.4
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