GB/T 33569-2017Test method of artificial weathering for coatings on exterior wood (English PDF)
户外用木材涂饰表面人工老化试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 12, 2017
Implementation date
December 1, 2017
Scope
GB/T 33569-2017 is the English-translated version of 户外用木材涂饰表面人工老化试验方法.
GB/T 33569-2017 is the Chinese test method for the artificial weathering of coatings on exterior wood. The exposure is run in equipment that combines fluorescent lamps emitting ultraviolet light with condensation and water spray, and the method serves to judge how the coated surface of outdoor wood behaves under artificial ageing.
Clause 3 defines the terms the result is reported in: the control specimen that all others are compared with, peeling of one coat from the coat below it or of the whole coating from the substrate, cracking caused by surface ageing, chalking as the loose fine powder left by the breakdown of binder and pigment, and adhesion as the firmness between film and coated surface.
It cites GB/T 4893.4-2013, GB/T 11186.2 and GB/T 33568-2017. It was issued on 12 May 2017 and has applied since 1 December 2017.
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Document preview — GB/T 33569-2017
National Standard of the People's Republic of China
- ICS
- 79.040
- Classification
- B 69
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative reference documents
- 3 Terms and definitions
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
1 Scope
This standard specifies the use of fluorescent lamps containing ultraviolet light, condensation and spray equipment, such as outdoor testing of artificial wood surface aging test Test method.
This standard applies to outdoor wood finishing surface artificial aging performance test.
2 Normative reference documents
The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this document. For undated references, the latest edition (including all modifications) applies to this document.
GB/T 4893.4-2013 Furniture surface paint film physical and chemical properties test Part 4: Adhesion cross cutting method
GB/T 4893.6-2013 Furniture surface film physical and chemical properties test Part 6: gloss determination method
GB/T 6682-2008 Analysis of laboratory water specifications and test methods
GB/T 9761-2008 Visual coloring of paints and varnishes
GB/T 11186.2 Methods of measurement of paint film colors - Part 2: Color measurement
GB/T 11186.3 Methods of measurement of paint film colors - Part 3: Chromatic aberration calculations
GB/T 33568-2017 Surface grade and evaluation method for exterior finishing of outdoor wood
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Control
Select the sample to be used as a reference value. All other samples are compared with them.
3.2 Peeling
One or more of the coating is separated from its lower coating, or the coating is completely separated from the substrate.
3.3 Cracking
The appearance of cracks in the paint film caused by surface aging.
3.4 Powder chalking
The surface of the paint film due to its degradation of one or more of the paint base and the decomposition of the pigment, showing the phenomenon of loose adhesion of fine powder.
3.5 Adhesion
The degree of firmness between the paint film and the coated surface (by physical or chemical action).
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 4893.4-2013Test of surface coating of furniture—Part 4:Determination of adhesion by cross-cut
- GB/T 4893.6-2013Test of surface coatings of furniture -- Part 6: Determination of gloss value
- GB/T 6682-2008Water for analytical laboratory use - Specification and test methods
- GB/T 9761-2008Paints and varnishes -- Visual comparison of the colour of paints
- GB/T 11186.2Methods for measuring the colour of paint films. Part 2: Colour measurement
- GB/T 11186.3Methods for measuring the colour of paint films. Part 3: Calculation of colour differences
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Related Standards
GB/T 11186.2-1989 — Methods for measuring the colour of paint films. Part 2: Colour measurement
GB/T 11186.3-1989 — Methods for measuring the colour of paint films. Part 3: Calculation of colour differences
GB/T 33568-2017 — Evaluation of degradation of coatings on exterior wood
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GB/T 33569-2017
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