GB/T 7791-2014Test method for performance of reducing frictional resistance of antifouling coatings (English PDF)
防污漆降阻性能试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
July 8, 2014
Implementation date
December 1, 2014
Scope
GB/T 7791-2014 is the English-translated version of 防污漆降阻性能试验方法.
GB/T 7791-2014 is the Chinese standard "Test method for performance of reducing frictional resistance of antifouling coatings".
Its scope clause reads: This standard specifies the test principle laboratory testing antifouling resistance reduction performance, torque calculation formulas, test device, a cylindrical sample size, Test procedures, data processing, calibration and test reports torque sensor.
This standard applies to abrasive type, self-polishing type and fouling off easily type (FRC) antifouling paint drop resistance performance measurement. Its clauses include terms and definitions.
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Document preview — GB/T 7791-2014
National Standard of the People's Republic of China
- ICS
- 87.040
- Classification
- G 50
- Replacing
- GB/T 7791-1987
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 3.1 Drop resistance performance
- 3.2 Lower resistivity
1 Scope
This standard specifies the test principle laboratory testing antifouling resistance reduction performance, torque calculation formulas, test device, a cylindrical sample size,
Test procedures, data processing, calibration and test reports torque sensor.
This standard applies to abrasive type, self-polishing type and fouling off easily type (FRC) antifouling paint drop resistance performance measurement.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 3186 Paints, varnishes and raw materials for paints and varnishes - Sampling
Determination of cathodic stripping properties GB/T 7790-2008 Paints and varnishes exposed to sea water resistant coating
GB/T 8923.2-2008 visual assessment of steel substrates before application of paints and surface cleanliness - Part 2. already coated
Local steel surface treatment after the removal of previous coatings Ratings
Part 3 of the steel surface roughness characteristics of blast - cleaned steel substrates before GB/T 13288.3-2009 coated paint
Score. calibration and surface roughness measurement method ISO surface roughness comparison specimens microscope focusing method
Determination of GB/T 13452.2 Paints and varnishes thickness
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Drop resistance performance
Ability to reduce the frictional resistance between the seawater and the coated surface.
3.2 Lower resistivity
Antifouling coatings in friction compared to antifouling coatings and seawater Seawater initial frictional action for some time, the friction resistance
Percent reduction in force.
Principle 4
This method is by measuring the torque of a coated cylindrical specimen antifouling coating at a rotational speed of the water when the turbulent state, obtained a
Resistance at a speed of antifouling coatings and water interface, combined with sailing simulations, comparing before and after coating seawater erosion resistance at the same speed
Change in force, can be measured and evaluated by an antifouling paint drop resistance performance and lower resistivity.
5 the torque (resistance) is calculated
Torque cylindrical sample size and sample cylinder radius ﹑ height, rotation speed ﹑ seawater density, can be used formula (1).
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Similar standards
Editions of GB/T 7791
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 7791-2014 | Test method for performance of reducing frictional resistance of antifouling coatings | current edition | Current |
| GB/T 7791-1987 | Test method for performance of reducing frictional resistance of antifouling coatings | previous edition | Superseded |
This page sells the current edition, GB/T 7791-2014. Earlier editions are listed for reference only.
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