Tiêu chuẩn iso 04628 3 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 3:

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 3: Év lu tion du degré d’enro illement

T ir d edition

2 16-0 -1

Reference n mb r

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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 2

5 Ex pres io of r esults 2

6 Test rep rt 2

A nne x A (normative) Calbratio imag es 9

A nne x B (informative)Correlatio betwe n the ISO rating system and othe systems 14

Biblog raphy 15

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 and r plac s the se on edition (ISO 46 8-3:2 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 on the rust ed ar a ofthe degr e of rus ing Ri 5 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

degradation 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 ch n es

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 s es 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 ses s ment o degr e o delamin tio  a d c or os ion aro nd a sc ribe or othe  artific ial defec t

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

P aints and varnishes — Evaluation ofdeg radation of

Part 3:

This p rt of ISO 46 8 spe if ies a method for as es ing the degr e of rus ing 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 show co t ed st eel surfac s w hich ha e

det eriorat ed t o dife ent degr es b a combination of rus broken through the co ting an visible

un e rus

NOTE 1 T e pictorial stan ards have b en select ed from the “E rope n rust s ale” p blished by the E rope n

Confederation of Paint, Printing In an Artists’ Colour Man facturer ’ As ociations (C P ), Brus els T e

cor elation b tween the ISO s ale an the “E rope n rust s ale” is given in An e B, Ta le B.1

NOT 2 T e cor elation b twe n the ISO s ale an the rating sy stem of ASTM D 610 is given in An e B, Ta le B.2

NOTE 3 T e rust formation on u co ted st eel surfaces is designated in ac ordance with ISO 8 0 -1 (rust

grades A, B, C,an D)

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 uniform 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 46 8-1:2 1 , Paints a d v rni shes — Ev lu tion 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

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 rusting

Ri

rating charact erizing the degr e of rus formation (rus broken through an visible u de rus ) on a

co ting

4 A sses ment

As es the degr e of rus ing (Ri) on a co ting b means of the pict orial s an ards given in Figur 1 t o

Figur 5 The a pro imat e ar as rust ed (rus broken through plus visible u de rus ) shown on these

s an ards ar asin icat ed in Ta le 1

Proc d r s for as es ing invisible un e rus , if r q ir d, shal be a r ed betwe n the int er st ed p rties

Whe e dife ent degr es of rus ing oc ur in dife ent p rt of the ar a being as es ed, in icat e these

degr es of rus ing t og ethe with the part whe e each oc urs

Car y out the as es ment u de g ood i lumination, as spe if ied in ISO 1 07 6

If the a e ag e siz of the rus sp t on the t es ar a dife s conside a ly from those shown in the

pict orial s an ards, an in ication of their siz ma be given b r fe enc t o ISO 46 8-1:2 1 , Ta le 2

NOTE T e pictorial stan ards are b sical y inten ed for as es ing the de re of rusting of co t ed ste l T ey

can b used for designating the de re of cor osion of co ted non-fer ous metals if the form of bre k down is

compara le with that shown in the stan ards

Table 1 — De re of rusting an rusted are

%

Ri 0

Ri 1

Ri 2

Ri 3

Ri 4

Ri 5

0

0,0

0,5

1

8

40 to 5

a

a

When me surin the rus ed are in Fig re A.5, it is only about 3 % If rus is as es ed visualy usin Fig re 5, the

impres ion of rus ed are is 4 % to 50 % One re son mig t be that par ly delaminated rus flak es are not dis in uished

fom other rus ed are s B t his is neglgible be ause Ri 5 normaly is out ide an spe if ic tion

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

given in An ex A

5 Ex pres ion of results

Ex r s the degr e of rus ing as Ri clas as shown in Figur 1 t o Figur 5

If a plca le, in icate the dife ent degr es of rus ing o tained, to ethe with the part of the tes

ar a conc rned

If a plca le, in icat e the degr e of rus ing Ri t og ethe with the n me ical rating of the siz of the rus

spot

F or ex mple, if the rust ed ar a cor esp n s t o Figur 3, Ri 3, an the siz s of the individ al rus spot

ar betwe n 0,5mm an 5 mm, r port he r sult as

— rus ing;degr e of rus ing Ri3 ( S4 )

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 p rt of ISO 46 8, i.e ISO 46 8-3;

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

d) r sult of the as es ment in ac ordanc with Clause 5;

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

f) any u usual featur s (anomales)o se ved d ring the as es men

g) thedat e of the ex mination

Figure 1 — De re of rusting Ri 1

Figure 2 — De re of rusting Ri 2

Figure 3 — De re of rusting Ri 3

Figure 4 — De re of rusting Ri 4

Figure 5 — De re of rusting Ri 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.5 t o cal brat e the ima ing sy st em

Figure A.1 — De re of rusting Ri 1

Figure A.2 — De re of rusting Ri 2

Figure A.3 — De re of rusting Ri 3

Figure A.4 — De re of rusting Ri 4

Figure A.5 — De re of rusting Ri 5

A nne x B

Table B.1 — Cor elation betwe n the ISO rating sy stem and the “E ro e n rust s ale”

Ri 0

Ri 1

Ri 2

Ri 3

Ri 4

Ri 5

R e 0

R e 1

R e 2

R e 3

R e 5

R e 7

Table B.2 — A ppro imate cor elation betwe n the ISO rating sy stem and the ASTM rust s ale

( ASTM D6 10)

Ri 0

Ri 1

Ri 2

Ri 3

Ri 4

Ri 5

1

9

7

6

4

1 to 2

Bibl og raphy

[1] ISO 8 0 -1, Prep ratio o s te l s ubs trates befr a plc atio o p int a d r lated produc ts —

Vi s ual as s es s ment o s urfc e clea lnes s — Part 1: R us t grades a d pr p ration grades o u c oated

s te l s ubs trates a d o s te l s ubs trates a te o e al r mo al o pr v io s c oatin s

[2] ASTM D6 10, Tes t Meth ds fr Ev lu tin Degr e o Rus tin o Painted Ste l S rfces

ICS  87.040