Tiêu chuẩn iso 04628 2 2016

ISO he Int ernational Org nization for Stan ardization is a worldwidefede ation of national s an ards b dies ISO membe b dies.. The work of pr p ring Int ernational Stan ards is normaly

Paints and varnishes — Evaluation

defects, and ofintensity ofuniform

Part 2:

Peinture s et ve nis — Év lu tion de la dé radation de s r vê tement

— Désign tion de la q a tité et de la dimension de s déa ts, et de

l’intensité de s ch n ement u iforme s d’aspect —

Partie 2: Év lu tion du degré de clo u ge

T ir d edition

2 16-0 -1

Reference n mb r

COPYRIGHT PROTECTED DOCUMENT

© ISO 2016, P blshed in Sw itz rlan

A ll rig hts r eserved Unles otherw ise spe ified, nopar of this p blc tion ma y be r epr od c d or utilz d otherw ise in an form

or b an me ns, ele tr onic or me hanic l, inclu in p oto opying , or postin on the internet or an intranet , w ithout prior

written permis ion Permis ion c n be req esed from either ISO at the ad r es below or ISO’s member bod y in the c u try of

the r eq eser

ISO c pyrig ht ofic

C de Blan on et 8 • C 4 1

CH-1 14 Vernier, Geneva, Sw itzerlan

Tel + 12 7 9 011

Fax 412 7 9 0 4

F reword i v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms and definitio s 1

4 A sses ment 1

5 Ex pres io of r esults 2

6 Test rep rt 2

A nne x A (normative) Calbratio imag es 7

A nne x B (informative)Correlatio betwe n ISO 4 28-2 and ASTM D 714 rating systems 12

Biblog raphy 13

ISO (he Int ernational Org nization for Stan ardization) is a worldwidefede ation of national s an ards

b dies (ISO membe b dies) The work of pr p ring Int ernational Stan ards is normaly car ied out

through ISO t ech ical committ ees Each membe b dy int er st ed in a subje t for w hich a t ech ical

committ ee has be n es a lshed has the right t o be r pr sent ed on that committ ee Int ernational

org nizations, g ove nmental an non-g ove nmental, in laison with ISO, also take part in the work

ISO cola orat es closely with the Int ernational Ele trot ech ical C mmis ion (IEC) on al matt ers of

ele trot ech ical s an ardization

The proc d r s used t o develo this document an those int en ed for it furthe maint enanc ar

desc ibed in the ISO/IEC Dir ctives, Part 1 In p rticular the dife ent a pro al c it eria ne ded for the

dife ent ty es of ISO document should be not ed This document was draft ed in ac ordanc with the

edit orial rules of the ISO/IEC Dir ctives, Part 2 ( e www.iso.org dir ctives)

A tt ention is drawn t o the p s ibi ity that some of the element of this document ma be the subje t of

p t ent right ISO shal not be held r sp nsible for identifying any or al such p t ent right Detais of

any p t ent right identified d ring the develo ment of the document wi be in the Introd ction an / r

on the ISO ls of p t ent de larations r c ived ( e www.iso.org p t ent )

Any trade name used in this document is information given for the convenienc of use s an does not

cons itut e an en orsement

F or an ex lanation on the meaning of ISO spe ific t erms an ex r s ions r lat ed t o conformity

as es ment, as wel as information a out ISO’ s adhe enc t o the WTO principles in the Te h ical

Bar ie s t o Trade (TBT) se the fol owing URL: F or word - Sup lementary information

The committ ee r sp nsible for this document is ISO/TC 3 , Paint a d v rni shes , Subcommitt ee SC 9,

G ene al tes t meth ds fr p ints a d v rni shes

This third edition canc ls an r plac s the se on edition (ISO 46 8- 2:2 0 ), w hich has be n t ech icaly

r vised with the folowing chang es:

a) a normative r fe enc t o ISO 1 076 for i lumination for the as es ment has be n ad ed;

b) a not e conc rning visibi ty of S1siz of blst ers has be n ad ed

ISO 46 8 consis s of the folowing part , un e the g ene al title Paints a d v rni shes — Ev lu tio o

degradatio o c oatin s — Des ig atio o q a tit y a d s i ze o defec ts , a d o intens it y o u ifrm cha ges

in a peara c e:

— Part 1: G ene al introduc tio a d des ig atio sys tem

— Part 2 : As s es s ment o degr e o bli s te in

— Part 3: As ses s ment o degr e o rus tin

— Part 4: As ses s ment o degr e o c rackin

— Part 5: As s es s ment o degr e o flakin

— Part 6 : As s es s ment o degr e o chalkin b ta e meth d

— Part 7: As s es s ment o degr e o chalkin b velvet meth d

— Part 8: As s es s ment o degr e o delamin tio  a d c or os io  aro nd a sc ribe or othe  artific ial defec t

— Part 10: As s es s ment o fi frm c or os io

P aints and varnishes — Evaluation ofdeg radation of

Part 2:

This p rt of ISO 46 8 spe if ies a method for as es ing the degr e of bl st ering of co tings b comp rison

with pict orial s an ards

The pict orial s an ards pro ided in this p rt of ISO 46 8 i us rat e bl st ers in the siz s 2, 3, 4, an 5,

an each siz in the q antities (densities) 2, 3, 4, an 5

ISO 46 8-1 defines the sy st em used for designating the q antity an siz of defe t an the int ensity

of chang es in a pearanc of co tings an outl nes the g ene al principles of the sy st em This sy st em is

int en ed t o be used, in p rticular, for defe t caused b ag eing an weathe ing, an for u iform chang es

such as colour chang es, for ex mple yelowing

2 Normati ve r eferences

The folowing document , in w hole or in p rt, ar normatively r fe enc d in this document an ar

in ispensa le for it a pl cation F or dat ed r fe enc s, only the edition cit ed a pl es F or u dat ed

r fe enc s, the lat es edition of the r fe enc d document ( inclu ing any amen ment )a pl es

ISO 1 07 6, Paints a d v rni shes — Lig tin a d proc edur fr v i s ual as ses s ment o c oatin s

3 Terms and definitions

F or the purposes of this document, the folowing t ermsand definitions a ply

3.1

de re of bl stering

rating charact erizing blst ers in a co ting in t erms of q antity (density) an siz

As es the q antity an siz of the bl st ers in a co ting b means of the pictur s given in Figur 1 t o

Figur 4

NOTE T e S size of blister is not visible with normal cor ected vision but only with × 0 ma nif ication

Whe e the ar a t o be ex mined exhibit bl st ers of v rying siz , q ot e as the siz rating that of the

bl st ers w hich ar ty ical of the t es ar a

Car y out he as es ment u de g ood i lumination, as spe if ied in ISO 1 076

If the as es ment is t o be done using an o tical ima ing sy st em, cal brat e the sy st em using the imag es

given in An ex A

5 Ex pres ion of results

Ex r s the ratings for the q antity (density) an siz of the bl st ers as given in Figur 1 t o Figur 4,

t og ethe with the a pro imat e dimensions of the ar a conc rned, or it p rtion of the t otal ar a,

ex r s ed as a pe c ntag e

F or ex mple, if the co ting is as es ed as ha ing bl st ers q antity 2, siz 2, i.e mat ching Figur 1 a), it

shal be r p rt ed as

— bl st ering; degr e of blst ering 2( S2)

6 Test repor t

The t es r p rt shal contain at leas the folowing information:

a) al detais ne es ary t o identify the co ting ex mined;

b) a r fe enc t o this part of ISO 46 8, i.e ISO 46 8- 2;

c) thety e of surfac ex mined, it siz an , if a pro riat e, it location;

d) ther sult of the ev luation as in icat ed in Clause 5;

e) an indication of the i lumination u de w hich the as es ment was car ied ou

f) any u usual featur s (anomales)not ed d ring the as es men

g) thedat e of the ex mination

a)Quantity (density)2 — 2( S2) b)Quantity (density)3 — 3( S2)

c) Quantity (density) 4 — 4( S2) d) Quantity (density) 5 — 5( S2)

Figure 1 — Bl ster of size 2

a)Quantity (density)2 — 2( S3) b)Quantity (density)3 — 3( S3)

c)Quantity (density) 4 — 4( S3) d) Quantity (density) 5 — 5( S3)

Figure 2 — Bl ster of size 3

a) Quantity (density)2 — 2( S4) b)Quantity (density)3 — 3( S4)

c)Quantity (density)4 — 4( S4) d) Quantity (density) 5 — 5( S4)

Figure 3 — Bl ster of size 4

a) Quantity (density) 2 — 2( S5) b) Quantity (density)3 — 3( S5)

c)Quantity (density)4 — 4( S5) d) Quantity (density) 5 — 5( S5)

Figure 4 — Bl ster of size 5

A nne x A

(normative)

If the as es ment is t o be done using an o tical ima ing sy st em, use the imag es given in Figur A.1 t o

Figur A.4 t o calbrat e the ima ing sy st em

a)Quantity (density)2 — 2( S2) b)Quantity (density)3 — 3( S2)

c) Quantity (density) 4 — 4( S2 d) Quantity (density) 5 — 5( S2)

Figure A.1 — Bl ster of size 2

a)Quantity (density)2 — 2( S3) b)Quantity (density)3 — 3( S3)

c)Quantity (density) 4 — 4( S3) d) Quantity (density) 5 — 5( S3)

Figure A.2 — Blster of size 3

a) Quantity (density)2 — 2( S4) b)Quantity (density)3 — 3( S4)

c)Quantity (density)4 — 4( S4) d) Quantity (density) 5 — 5( S4)

Figure A.3 — Blster of size 4

a) Quantity (density)2 — 2( S5) b) Quantity (density)3 — 3( S5)

c)Quantity (density)4 — 4( S5) d) Quantity (density) 5 — 5( S5)

Figure A.4 — Blster of size 5

A nne x B

None

—

Few

Medium

Medium-dense

Dense

0

1

2

3

4

5

—

8

6

4

2

1

2

3

4

5

Bibl og raphy

[1] ISO 46 8-1, Paints a d v rni shes — Ev lu tio o degradatio o c oatin s — Des ig atio o

q a tit y a d s i ze o defec ts, a d o intens it y o u ifrm cha ges in a peara c e — Part 1: G ene al

introduc tio a d des ig atio sys tem

[2] ASTM D7 4, Sta dard Tes t Meth d fr Ev lu tin Degr e o B li s te in o Paints