Tiêu chuẩn iso 08502 3 2017

© ISO 2017 Preparation of steel substrates before application of paints and related products — Tests for the assessment of surface cleanliness — Part 3 Assessment of dust on steel surfaces prepared fo[.]

Preparation ofsteel substrates before

Part 3:

A ssessment ofdust on steel surfac es

Pré aration des subjectiles d’acier a a t a plication de peinture s

et de produits assimilés — Essais p ur a précier la pro r té d’u e

surfc —

Partie 3: Év lu tion de la p ussièr sur le s surfc s d’acier pré arée s

p ur la mise en peintur (méth de du ru a adh sifsensible à la

pr ssion)

S con edition

2 17-0

Refer ence n mb r

ISO 8 0 -3:2 17(E)

COPYRIGHT PROTECTED DOCUMENT

© ISO 2017, 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, Switzerlan

Tel + 12 7 9 011

Fax 412 7 9 0 4

c pyrig ht@iso.or g

www.iso.or g

F reword i v

Introduction v

1 Sc ope 1

2 Nor mati ve r eferenc es 1

3 Terms an definitions 1

4 Principle 1

5 A pparatus and mater ials 2

6 Proc ed re .2

7 Test rep r t 4

A nne x A (informative)Spr ing -loaded r oler 5

Biblog raphy 8

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 sponsible 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

For an ex lanation on the meaning of ISO spe ific terms an ex r s ions r lat ed to conformity as es ment,

as wel as information a out ISO’s adhe enc to the Wor ld Trade Org nization (WTO) principles in the

Te h ical Bar ie s to Trade (TBT) se the folowing URL: www iso org iso/ for word html

This document was develo ed b Te h ical C mmitt ee ISO/TC 3 , Paint a d v rni shes , Subcommitt ee

SC 1 , Prep ration o s te l s ubs trates befr a plc atio o p ints a d r lated produc ts

This se on edition canc ls an r plac s the firs edition (ISO 8 0 -3:1 9 ), w hich has be n t ech icaly

r vised with the folowing chang es:

a) in Cla use 2 an 5.1, IEC454- 2 has be n subs itut ed with IEC6 454- 2;

b) in Ta le 1, de imal sign has be n chang ed t o a de imal comma;

c) Figur A.4 has be n ad ed an the forme Figur A.4 has be n r named Figur A.5;

d) thedocument has be n edit orial y r vised

ISO 8 0 consis s of the folowing p rt , u de the g ene al title Prep ratio o s te l s ubs trates befr

a plc ation o p ints a d r lated produc ts — Tes ts fr the as s es s ment o s urfc e clea lnes s:

— Part 2 : L b rator y determin tio o chloride o clea ed s urfc es

— Part 3 : As ses s ment o dus t o s te l s urfc es pr p r d fr p intin (pr s s ure -sens itive ta e meth d)

— Part 4 : Guida ce o the es timatio o the pro a i t y o c ondens atio prior to p int a plc atio

— Part 5: Meas ur ment o chloride o s te l s urf c es pr p r d fr p intin (io detec tio tu e meth d)

— Part 6 : Ex trac tio o s olu le c ontamin nts fr a alys i s — The B resle meth d

— Part 9: Field meth d fr the c onduc tometric dete min tio o wate -s olu le s alts

— Part 1 : Field meth d fr the turbidimetric dete min tion o wate -s olu le s ulf te

— Part 12 : Field meth d fr the titrimetric dete min tion o wate -s olu le fe ro s io s

The pe formanc of prot ective co tings of p int an r lat ed prod ct a pled t o st eel is signif icantly

afe t ed b the s at e of the st eel surfac immediat ely prior t o painting The princip l fact ors that ar

k own t o influenc thispe formanc ar as folows:

a) pr senc of rus an mi scale;

b) pr senc of surfac contaminant , inclu ing salt , d s , oi s an gr ases;

c) surfac profile

The ISO 8 0 , ISO 8 0 an ISO 8 0 se ies of Int ernational Stan ards ha e be n pr p r d t o pro ide

methods of as es ing these fact ors, w hie the ISO 8 04 se ies pro ides guidanc on the pr paration

methods that ar a ai a le for cleaning st eel subs rat es, in icating the ca a i ties of each in at aining

spe if ied levels of cleanlnes

These se ies of Int ernational Stan ards do not contain r commen ations for the prot ective co ting

sy st ems t o be a pled t o the st eel surfac Neithe do they contain r commen ations for the surfac

q alty r q ir ment for spe if ic situations even though surfac q alty can ha e a dir ct influenc on

the choic of prot ective co ting t o be a pled an on it pe formanc Such r commendationsar fou d

in othe document such as national s an ards an codes of practic It wi l be ne es ary for the use s

of these Int ernational Stan ardst o ensur that the q alties spe ified ar

— comp tible an a pro riat e b th for the environmental con itions t o w hich the st eel wi l be ex osed

an for the prot ective co ting sy st em t o be used, an

— within theca a i ty of the cleaning proc d r spe if ied

The four se ies of Int ernational Stan ards r fe r d t o a o e deal with the folowing aspe t of

pr paration of st eel subs rat es befor a plcation of paint an r lat ed prod ct :

— ISO 8 0 on visual as es ment of surfac cleanlnes ;

— ISO 8 0 on t es s for the as es ment of surfac cleanlnes ;

— ISO 8 0 on surfac roughnes charact eris ics of blas -cleaned st eel subs rat es;

— ISO 8 04 on surfac pr p ration methods

Each of these Int ernational Stan ards is in turn divided int o separat e p rt

This p rt of ISO 8 0 desc ibes a proc d r for the as es ment, using a pr s ur -sensitive ta e method,

of the q antity an the p rticle siz of d s on st eel surfac spr p r d for p inting

In the p inting sched le r q ir ment of contractual document giving detais of surfac pr paration

b blas -cleaning, it is normaly spe if ied that al surfac s shal be fr e from surfac contamination

inclu ing oi, gr ase, dirt, d s an wat er-soluble salt

Dus on blas -cleaned st eel surfac s can r d c the adhesion of subseq ently a pled org nic

co tings an , b a sorbing mois ur , might promot e the cor osion of the blas -cleaned st eel surfac s

A ccumulation of d s mor natural y oc urs on horizontal surfac s, the int erior of pipes, an in

s ructural ca ities Spe ial inspe tion should be car ied out t o ensur that such ar as ar adeq at ely

cleaned an adeq at ely fr e from d s befor painting

Be a use of subje tive fact ors inv lved in the t es proc d r , the t es does not alow the pr cise

det ermination of d s r tained on blas cleaned st eel surfac s Nevertheles , w hen car ied out b

ex e ienc d o e at ors an espe ial y w hen used t o comp r the pe formanc of surfac s u de t es

with a r ed s an ard spe imens, it givesve y useful information

The e ar many p s ible v ria les in the conditions at sit es w he e t es s might be r q ir d t o be car ied

out Agr ement made betwe n int er st ed p rties, w he e a pro riat e, should inclu e the n mbe or

fr q ency of t es s, the t es locations, and the dat esan times w hen the t es s ar t o be car ied out

Preparation ofsteel substrates before application ofpaints

Part 3:

This p rt of ISO 8 0 desc ibes a method for the as es ment of d s r maining on cleaned st eel surfac s

pr par d for p inting It pro ides pict orial ratings for the as es ment of the a e ag e q antity of d s It

also pro ides desc iptive clas es for the as es ment of the a e ag e siz of the d s p rticles

The method desc ibed is a q altative t es useful for a st eel surfac , befor cleaning, cor esp n ing

t o rus grade A, B or C as def ined in ISO 8 0 -1 It can be used as a “ pas / fai” t es or t o pro ide a

pe manent r cord of the d s pr sent on a surfac

NOTE T e q antity ratings an size clas es refer ed to in this part of ISO 8 0 are derived from ISO 4 2 -1

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 18, Paints a d v rni shes — Te ms a d de initio s

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 ratio 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

IEC 6 454- 2, Pres s ur -s ens itive adhes i ve ta es fr elec tric al p rp ses — Part 2 : Meth ds o tes t

3 Terms and definitions

F or the purposes of this document, the t erms an def initions given in ISO 4618 an the folowing a ply

3.1

dust

lo se p rticulat e matt ers pr sent on a st eel surfac pr p r d for p inting, arising from blas -cleaning

or othe surfac pr p ration proc s es or r sulting from the action of the environment

A pr s ur -sensitive adhesive ta e is pr s ed on t o the st eel surfac pr p r d for painting The ta e,

with the d s ad e ing t o it, is then r mo ed an plac d on a displa b ard of a colour w hich contras s

t o that of the d s , an is ex mined visual y The q antity of d s ad e ing t o the ta e an the d s

p rticle siz ar then es imat ed

5 A pparatus and materials

5.1 Adhesi ve tape, consisting of r ols of virtualy colour les , transp r ent , self-ad esive, pr es

ure-sensitive ta e of width 2 mm, ha ving an ad esion pe l s r eng th of at leas 1 0 N/m width when

measur ed in ac or danc with the 18 ° pe l tes in IEC 6 454-2

NOTE T is pe l test cal s for a 1 0° pe l from ste l b cking at a pe l rate of (3 0± 3 )mm/min

5.2 Display boar d, of colour contr as ing to that of the d st , for use as a b ckg r ou d, e.g of g las or

black or white glaz d tiles, car ds or p pe

5.3 Spr ing -loaded rol er , so desig ned that it is ca a le of a plying a lo d of 3 ,2 N or 49,0 N or an

inte mediate lo d ( e A nnex A)

NOTE T e rol er is calibrated using weight pieces of mas 4 kg an 5 kg A t the 4 kg calibration point, the

for e ex erted by the roler is 3 ,2 N an at the 5 kg calibration point it is 49,0 N

5.4 Hand lens, ca a le of mag nification × 0

6 Proc edure

6.1 The method ma y be car ied out eithe

a) as a “ pas / fai ” t es b as es ing the q antity of d s pr sent on a t es surfac an the a e ag e d s

particle siz , in comparison with spe if ic lmit , or

b) t o pro idea pe manent r cord of the d s pr sent on a surfac b mounting the ta es used t o car y

out he t es s on ties, cards or p pe , of an a pro riat e contras ing colour

6.2 This method is suita le for the as es ment of d s r etained, afe cleaning , on a s e l surfac which

corr esp n ed befor e cleaning to rus g rade A , B or C as defined in ISO 8 0 -1 Be ause of the lmited

elasticity of adhesive tape, it is not p s ible for the tape to penetrate into the de p pit pr esent in cleaned

s e l that orig inaly corresp n ed to rus g rade D

6.3 Whie a tes pr oc d re in which pr es ur e is a pled to a ta e using the th mb is subje tive, it is

usualy adeq ate, espe ialy for use in situations wher e surfac s fr ee fr om d s ar e r eq ir ed In cases of

dispute, exc pt when rus g rade C or D is inv lved, pr es ure ma y be a pled to the b ck of the ad esive

ta e using a spring -lo ded role

6.4 At the beg in ing of each se ies of tes s, remo e an discard the firs thr ee turns of ta e fr om the

rol an then r emo e a pie e a out 2 0 mm long

6.5 Touching the ad esive side of the ta e only at the ends, pres a out 1 0mm of the fr eshly ex osed

ta e firmly on to the surfac u de test With due r egar d to 6.3, ado t one of the folowing alte native

methods g iven in a) an b)

a) Plac the th mb ac os one en of the ta e an mo e theth mb, w hie maintaining a f irm pr s ur ,

at a cons ant spe d along the ta e thr e times in each dir ction, so that each s roke takes betwe n

5 s an 6 s R emo e the ta e from the t es surfac , plac it on an a pro riat e displa b ard (5.2)

an cause it t o adhe e t o the bo rd b rub ing with the th mb

b) Ap ly the calbrat ed spring -lo ded role (5.3) c ntraly ac os one end of the ta e an mo e the

role , w hi e maintaining a downward lo d betwe n 3 ,2 N an 49,0 N, at a cons ant spe d along

the ta e thr e times in each dir ction, so that each s roke takes betwe n 5 s an 6 s R emo e the

ta e from the t es surfac , plac it on an a pro riat e displa b ard (5.2) an ca use it t o adhe e t o

theb ard b rub ing with the th mb

6.6 A sses the q antity of d s on the tape b comp ring visualy an ar ea of the ta e with eq iv

lent-siz d ar easof the pictorial refer enc s show n in Fig ur e 1 Re ord the rating corr esp n ing to the r eferenc

that is the closes match

The use of int ermediat e half-st eps ispe mis ible if r q ir d t o give a mor detaied r p rt

R eport any o e al discoloration as q antity rating 5, siz clas 1

NOTE It is not u usual, aft er car ying out this test, t o f in that he tape displays an overal dis oloration,

usualy red ish-brown or black, sometimes with the presence of dis rete visible particles, depen ing on the ty e

of a rasive used when blast cle ning T e dis oloration is caused by mic os opic d st rom the test surface that

can cause serious interference with paint ad esion

Figure 1 — Pictorial references cor espo ding to dust quantity ratings 1, 2, 3, 4 and 5

6.7 A sses the pr edominating d s p rticle siz on the ad esive tape b r eferenc to Ta le 1 which

defines six d s p rticle siz clas es, desig nated 0, 1, 2, 3, 4 an 5

The use of int ermediat e half-st eps ispe mis ible if r q ir d t o give a mor detaied r p rt

R ep rt any o e al discoloration as siz clas 1

NOTE Mic os opic d st dis oloration usualy consists of particles les than 5 μm in diameter

Table 1 — Dust size clas es

0 Particles not visible u der 1 × ma nif ication

1 Particles visible u der 1 ×ma nif ication but not with normal or cor ected vision (usualy particles

les than 5 μm in diamet er)

2 Particles just visible with normal or cor ect ed vision (usual y particles b tween 5 μm an 1 0 μm in

diameter)

3 Particles cle rly visible with normal or cor ected vision (particles u t o 0,5mm in diameter)

4 Particles b tween 0,5 mm an 2,5 mm in diameter

5 Particles larg r than 2,5mm in diameter

6.8 C r y out a suficient n mbe of tests to characte iz the surfac u de test

F or eve y surfac of one p rticular ty e an aspe t, car y out not les than thr e separat e t es s If the

r sult do not ha e a spr ad of one or les q antity rating, car y out at leas two ad itional t es s t o

es a lsh the mean

6.9 A fte completing the tes an befor e painting the s e l surfac , r emo e any ta e or ad esive lef on

the tes surfac

7 Test repor t

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

a) al detai s ne es ary t o identify the surfac ()t est ed;

b) a r fe enc t o this part of ISO 8 0 , i.e ISO 8 0 -3;

c) al detai s ne es ary t o identify the adhesive ta e used;

d) al detai s ne es ary t o identify the subs rat e used asa displa b ckgrou d for the ta e;

e) the natur of the ar a( ) of each surfac t est ed, with r fe enc t o spe ific featur s, e.g ledg es,

beams, web or flang e fac s, p cket formed from fa ricat ed u it an the at itu e of the t es ar a,

e.g vertical, horizontal upward-facing or horizontal downward-facing;

f) the d s q antity rating() an d s siz clas (es) for each surfac ex mined (alt ernatively, for

g ene al st eel cons ruction work, the t es ta es themselves ma , if a r ed between the int er st ed

parties, be kept as a r cord of the t es s);

g) any deviation from the proc d r desc ibed;

h) any u usual featur s (anomales)o se ved d ring the t est ;

i) thedat e and, if a plca le, the time of each t es