GB/T 23987-2009 English PDF (GBT23987-2009)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click GB/T 23987-2009
Historical versions: GB/T 23987-2009
Preview True-PDF (Reload/Scroll if blank)

GB/T 23987-2009: Paints and varnishes -- Exposure of coatings to artificial weathering -- Exposure to fluorescent UV lamps and water
GB/T 23987-2009
ICS 87.040
G 50
National Standard
of the People’s Republic of China
GB/T 23987-2009 / ISO11507: 2007
Paints and varnishes - Exposure of coatings to
artificial weathering - Exposure to fluorescent
UV lamps and water
(ISO11507: 2007, IDT)
ISSUED ON: JUNE 2, 2009
IMPLEMENTED ON: FEBRUARY 1, 2010
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of China
Table of Contents
1 Scope ... 4
2 Normative reference standards ... 4
3 Terms and Definitions ... 5
4 Principle ... 6
5 Instrument and Equipment ... 6
6. Sampling ... 12
7. Test panels ... 13
8. Operating steps ... 14
9 Calibrations ... 15
10 Inspection of test panels (aging criterion) ... 15
11 Precision ... 16
12 Supplementary test conditions ... 16
13 Test report ... 16
References ... 18
Foreword
This Standard equivalently adopts international standard ISO11507: 2007 Paints
and varnishes - Exposure of coatings to artificial weathering - Exposure to fluorescent
UV lamps and water (English version).
This Standard equivalently translates ISO11507: 2007.
In order to use easily, the editorial revision of this Standard is as follows:
— REPLACE “this international standard” with “this Standard”;
— DELETE the foreword of international standard.
This Standard was proposed by China Petroleum and Chemical Industry
Association.
This Standard is administered by National Technical Committee of Paints and
Pigments for Standardization.
This Standard was drafted by: the Changzhou Research Institute of Coatings
Chemicals in CNOOC, and Atlas Material testing technology Ltd.
The main drafters of this Standard are: Cao Xiaodong, Ji Xiaopei, and heng Ge.
Paints and varnishes - Exposure of coatings to artificial
weathering - Exposure to fluorescent UV lamps and water
1 Scope
This Standard specifies the test methods of using test equipment, including
fluorescent UV lamps and gel or spraying water, to determine the coatings' durability
to artificial weathering.
Note: Because the UV of fluorescent UV lamps only simulates partial ultraviolet
spectrum of sunlight, so the test panels only endures little amount of the ultraviolet
which is more destructive portion in the spectrum.
Comparing with sunlight, this test lacks of visible-light and infrared light's radiant
energy, so the temperature of heated test panels shall not be higher than that of
surrounding air when using it.
2 Normative reference standards
Clauses in the following documents become part of this Standard through the
quotation of this Standard. For dated references, all the subsequent amendments
(except the content of errata) or revisions do not apply to this Standard. However, all
parties who enter into agreement based on this Standard are encouraged to study if
the latest version of these documents can be used. For undated references, the latest
version applies.
GB/T 3186-2006 Paints and varnishes and raw materials for paints and varnishes –
sampling (GB/T3186-2006, ISO15528: 2000, IDT)
GB/T 6682-2008 Water for analytical laboratory use-Specification and test methods
(GB/T6682-2008, ISO3696: 1987, MOD)
GB/T9271-2008 Paints and varnishes - standard panels for testing plate
(GB/T9271-2008, ISO1514: 2004, MOD)
GB/T13452.2-2008 Paints and varnishes - Determination of film thickness (GB/T
13452.2-2008, ISO2808: 2007, IDT)
Note: Suitable methods include the methods specified in GB/T 9754, GB/T 11186.1-GB/T
11186.3, GB/T 9761 and ISO 4628-1 ~ ISO 4628-8 and ISO 4628-10.
Unless otherwise agreed, the test panels during the inspection shall not be washed
or polished.
11 Precision
The precision data of the standard is not yet available.
12 Supplementary test conditions
As for any specific application of the method specified by this Standard, in addition
to above clauses, there are more details to be given, such as the following:
a) The substrate material, the thickness of the substrate and the surface treatment
of the substrate;
b) The method of applying tested coatings onto substrate;
c) Before exposure, the time and condition of coating drying (or baking) and placing
(if applicable);
d) Before the start of exposure, the test plates’ adjustment time and conditions (if
the same test plate has been carried out other test in advance);
e) Thickness of dry coating, in μm, and whether the measurement
method according to GB/T 13452.2 requirement is a single-layer or
multi-layer coating system;
f) All the detail of conditions and time;
g) Any specific test requirements, for example, agreed on using degree of
color-change to assess color fastness.
13 Test report
The test report shall at least include the following:
a) IDENTIFY all the details of the test product (manufacturer, trademark, batch
number, etc.);