VCS 1027,0519-涂层气泡

Dept / Issued by 93733 Magnus Karlsson Issue 2 Established2007-03UM Page1(2)

The English language version is the original and the reference in case of dispute. Den engelska spr?kversionen ?r originalversion och skall ?beropas i h?ndelse av tvist.

TEST METHOD PROVNINGSMETOD

Evaluation degrees for blistering of paints Utv?rderingsskala f?r bl?s-bildning hos f?rger

Paints and enamels F?rg och lack

Orientation Orientering

As to its technical content, this standard conforms to ISO 4628-2:2003.

This issue of the VCS standard differs from issue 1 by:

?Referring to ISO 4628-2:2003 and its pictorial standards

?Giving an alternative evaluation method by rating the density of each size of blisters

separately

?Defining the blister size of each size rating number as a guide for the assessment ?Describing the assessment procedure more thoroughly

?Describing how to evaluate very small blisters (< 0,05 mm). Denna standard ?verensst?mmer i sak med

ISO 4628-2:2003.

Denna utg?va av VCS-standarden skiljer sig fr?n

utg?va 1 genom att:

?Referera till ISO 4628-2:2003 och dess

bildlikare

?Ange en alternativ utv?rderingsmetod d?r t?theten av varje storleksklass av bl?sor

betygss?tts separat

?Definiera bl?sornas storlek inom varje

storleksklass som en v?gledning vid

bed?mningen

?Beskriva bed?mningsproceduren mer

genomg?ende

?Beskriva hur mycket sm? bl?sor (< 0,05 mm) utv?rderas.

1 Scope 1 Omfattning

This standard is intended to be used when determin-ing the degree of blistering of paint coatings on test objects, which have been tested or used under accelerated or atmospheric conditions. Standarden ?r avsedd att anv?ndas vid best?mning av bl?sbildningsgrad i lackskikt p? provobjekt som provats eller anv?nts under accelererade eller atmos-f?riska betingelser.

2 Definitions 2 Definitioner

Blisters are defined as moisture-containing enclosures in the paint film.

The degree of blistering is defined as the rating number of the density and the size of blisters in a coating. Bl?sor definieras som fuktinneh?llande inneslutningar i lackskiktet.

Bl?sbildningsgraden definieras som betygsklassen f?r bl?sornas t?thet och storlek i en lackfilm.

3 Assessment 3 Bed?mning

The test objects shall be examined before the accelerated test to identify dirt and other defects in the paint film. These shall be marked to avoid them to be mixed up with blisters caused by the test. Provobjekten skall bed?mas f?re den accelererade provningen f?r att identifiera smuts och andra defekter i lackskiktet. Dessa ska markeras f?r att undvika att de f?rv?xlas med bl?sor som orsakas av provningen.

Issue

2

Page

2

Unless otherwise specified, the degree of blistering shall be assessed immediately after completion of the accelerated test. The test objects shall be examined under good illumination, from closer than arm's length and from all viewing angles. The density and size of the blisters shall be assessed by means of the pictorial standards in ISO 4628-2:2003. These

pictorial standards illustrate blisters in densities 2, 3, 4 and 5 and, for each density, blisters of sizes S2, S3, S4 and S5.

Om inget annat anges ska bl?sbildningsgraden bed?mas omedelbart efter avslutad accelererad provning. Provobjekten skall bed?mas i god

belysning, inom arml?ngds avst?nd och fr?n alla betraktelsevinklar. Bl?sornas t?thet och storlek skall bed?mas med hj?lp av bildlikarna i ISO 4628-2:2003. Dessa bilder visar bl?sor i t?theterna 2, 3, 4 och 5 och f?r varje t?thet bl?sor i storlekarna S2, S3, S4 och S5.

It is then decided which of the pictorial standards that best matches the blistering of the test object. The degree of blistering is then the rating number of density and size of that pictorial standard. Den bildlikare som b?st ?verensst?mmer med bl?sbildningen p? provobjektet best?ms. Bl?s-bildningsgraden ?r d? betygsklassen f?r t?thet och storlek som anges f?r denna bildlikare.

If the rating for density and size respectively is less than 2, the rating is 1. If there are no blisters, the rating is 0.

Bed?ms t?thet respektive storlek vara mindre ?n 2 blir betyget 1. Finns inga bl?sor blir betyget 0.

If none of the pictorial standards match the blistering of the test object, an alternative evaluation method can be used. By rating the density of each size of blisters separately, a combined rating is obtained. For example: The blisters of a test object are assessed to have density 3 of size S1 and density 2 of size S4. The degree of blistering is then 3(S1) + 2(S4). Om ingen bildlikare ?verensst?mmer med

bl?sbildningen p? provobjektet, kan en alternativ

utv?rderingsmetod anv?ndas. Genom att betygss?tta t?theten av varje storleksklass f?r sig erh?lls ett sammansatt betyg. Till exempel: Bl?sorna p? ett

provobjekt bed?ms ha t?theten 3 av storleken S1 och t?theten 2 av storleken S4. Bl?sbildningsgraden ?r d? 3(S1) + 2(S4).

In case of uncertainty regarding the size rating of the blisters, the table below can be used as a guide.

Vid os?kerhet ang?ende storleksbed?mning av bl?sorna, kan tabellen nedan v?gleda. Size rating number Storleksklass

Mean diameter of blister (d)Medeldiameter av bl?sa (d) S1 d ≤ 0,5 mm

S2 0,5 < d ≤ 1 mm S3 1 < d ≤ 2 mm S4

2 < d ≤ 4 mm S5

d > 4 mm

Blisters smaller than 0,05 mm (hair diameter) shall not be evaluated as blisters if they disappear within 24 h, stored at 23 ± 2°C and 50 ± 5% RH, after completion of the accelerated test.

Bl?sor som ?r mindre ?n 0,05 mm (h?rdiameter) skall inte bed?mas som bl?sor om de f?rsvinner inom 24 h, vid f?rvaring i 23 ± 2°C och 50 ± 5 % RF, efter avslutad accelererad provning.

4 Test report

4 Rapport

The test report shall include: a) Identification of the test object. b) Testing as per VCS 1027,0519.

c) The numerical rating of the density and size of

blistering. I provrapporten anges: a) Identifiering av provobjektet. b) Provning enligt VCS 1027,0519. c) Bl?sornas t?thetsklass och storleksklass.