Artificial weathering test method for plastics, coating and rubber materials used for machinery industrial products — Fluorescent UV lamps
1 Scope
This standard specifies one of the artificial weathering test methods for plastics, coating and rubber materials used for machinery industrial products — fluorescent UV lamps exposure test method.
This standard is applicable to the weatherability comparison and screening test of plastics, coating, rubber and other materials.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply to this standard. However, parties to agreements based on this standard [are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
GB/T 16422.1 Plastics — Methods of exposure to laboratory light sources — Part 1:General guidance (GB/T 16422.1-2006; ISO 4892-1: 1999, IDT)
GB/T 9271 Paints and varnishes — Standard panels for testing (GB/T 9271-1988, eqv ISO 1514; 1984)
GB/T 13452.2 Paints and varnishes — Determination of film thickness (GB/T 13452.2-1992, idt ISO 2808: 1974)
GB/T 7762 Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Static strain testing (GB/T 7762—2003, ISO 1431-1: 1989, MOD)
GB/T 2941 Rubber — General procedures for preparing and conditioning test pieces for physical test methods (GB/T 2941-2006, ISO 23529: 2004, IDT)
3 Terms and definitions
For the purposes of this standard, the following terms and definitions apply.
3.1
file specimen
some test materials which are stored under stable conditions and used for comparing the performance changes before and after exposure
3.2
control
material with similar composition and structure to the test material, which are used for performance comparison after simultaneous exposure with the test material
3.3
control specimen
part of the control material used for exposure
3.4
irradiance
radiant energy of the wavelength or band-pass irradiated per unit area per unit time, in W/m2
3.5
radiant exposure
time integration of irradiance, in J/m2
3.6
spectral power distribution
absolute or relative radiation energy emitted by a light source or received by an object, which is a function of wavelength
3.7
black panel thermometer
temperature measuring device that consists of a metal base plate and a thermal sensitive element, the latter being closely attached to the center of the former. The light receiving surface of the whole device is coated with a black coating, which can uniformly absorb all-sunlight spectral radiation
3.8
fluorescent ultraviolet lamp
low-pressure mercury arc lamp, with its radiation emitted by the mercury arc converted into longer wavelength ultraviolet radiation by the phosphorus coating and its spectral power distribution depending on the emission spectrum of the mercury arc, the emission spectrum of the phosphorus coating as well as the ultraviolet radiation transmittance of the glass tube
4 Principle
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Equipment
6 Specimen
7 Test conditions and test duration
8 Procedure
9 Precision and deviation
10 Test report
Annex A (Normative) Method for determining relative spectral power distribution of fluorescent UV lamps
Annex B (Informative) Excerpts from Table 4 of CIE Publication No. 85: 1989
Annex C (Informative) Examples of typical test conditions
Bibliography
