увод
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за предмет за који је основан технички комитет има право да буде заступљена у тој комисији. Међународне владине и невладине организације које су у вези са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електричне стандардизације.

Процедуре које се користе за израду овог документа и оне које се користе за даље одржавање описане су у Делу 1 ИСО/ИЕЦ директиве. Нарочито, треба обратити пажњу на различите критеријуме одобрења који су потребни за различите типове ИСО докумената. This document has been drafted in accordance with the editing rules of ISO/IEC Directive Part 2 (види исо.орг/дирецтивес).

Please note that certain elements of this document may be subject to patent rights. ИСО није одговоран за идентификацију било ког или свих таквих патената. Details of any patent rights identified during the preparation of the document will be found in the introduction and/or in the list of patent claims received by ISO (see iso.org/patents).

Any trade names used in this document are provided for the convenience of the user and do not constitute an endorsement.

ИСО 16474-3-2021 “Paints and varnishes laboratory light sources exposure test methods – Парт 3: Fluorescent ultraviolet lamps”

Voluntary, related standards and conformity assessment related ISO specific terminology and express the meaning of and the ISO in the technical barriers to trade (ТБТ) adhere to the principle of the world trade organization (WTO) information, please see the iso.org/iso/foreword.html.

This document has been prepared by the Technical Committee ISO/TC 35 (Боје и лакови), Пододбор СЦ 9 (General Test methods for paints and varnishes) in cooperation with the Technical Committee CEN/TC 139 (Боје и лакови) of the European Committee for Standardization (CEN), in accordance with the ISO-CEN Technical Cooperation Agreement (Vienna Agreement).

The second edition cancels and replaces the technically revised first edition (ИСО 16474-3:2013). Главне промене у односу на претходно издање су следеће:

– Ин 7.2, the temperature difference between the blackboard sensor and the black label sensor has been corrected;

– In Table 4, the blackboard temperature is not controlled during water spraying is changed;

– The text has been edited and revised, and the normative references have been updated.

A list of all parts in the ISO 16474 series can be found on the ISO website.

Any feedback or questions regarding this document should be directed to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

ИСО 16474-3-2021 “Paints and varnishes laboratory light sources exposure test methods – Парт 3: Fluorescent ultraviolet lamps”

увести
Coatings of paints, varnishes and similar materials (then simply referred to as coatings) are exposed to laboratory light sources in order to simulate in the laboratory the aging process that occurs during natural weathering or behind window glass.

1 Range
This document specifies methods for exposing coatings to fluorescent UV lamps, heat, and water in devices designed to reproduce the weathering effects that occur when materials are exposed to daylight in an actual end-use environment or through window glass.

The coatings are exposed to different types of fluorescent UV lamps under controlled environmental conditions (температура, влажност, and/or water). Different types of fluorescent UV lamps can be used to meet all requirements for testing different materials.

Sample preparation and result evaluation are covered for specific materials in other ISO documents.

General guidance is given in ISO 16474-1.

Note that exposure to fluorescent UV lamps for plastics is described in ISO 4892-3.

ИСО 16474-3-2021 “Paints and varnishes laboratory light sources exposure test methods – Парт 3: Fluorescent ultraviolet lamps”

2 Normative references
The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. За датиране референце, примењује се само наведена верзија. For undated references, a new version of the reference (укључујући све ревизије) примењује.

ИСО 1514, Боје и лакови – Standard panels for testing

ИСО 2808, Боје и лакови – Determination of film thickness

ИСО 4618, paints and varnishes – Terms and definitions

ИСО 9370, Пластика – Instrumental determination of radiation exposure in ageing tests – General guidance and basic test methods

ИСО 16474-1:2013, Боје и лакови. Methods of exposure to laboratory light sources. Парт 1: General guidance

3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4618 and the following articles apply.

ISO and IEC maintain terminology databases for standardization at the following addresses:

– ISO Online browsing platform: available at https://iso.org/obp

– IEC e-encyclopedia: available at http://electropedia.org/

ИСО 16474-3-2021 “Paints and varnishes laboratory light sources exposure test methods – Парт 3: Fluorescent ultraviolet lamps”

3.1 Radiation Exposure

H Test the radiation energy exposed to the panel

Белешка 1: Radiation exposure is given by the following formula:

H is radiation exposure, measured in joules per square meter (J/m2);

E is irradiance, in watts per square meter (W/m2);

t is the exposure time, in seconds.

Белешка 2: If the irradiance E is constant throughout the exposure time, the radiant exposure H is given only by the product of E and t.

ИСО 16474-3-2021 “Paints and varnishes laboratory light sources exposure test methods – Парт 3: Fluorescent ultraviolet lamps”

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.