Tiêu chuẩn iso 20567 1 2017

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

P aints and varnishes — Determination

Part 1:

Peinture s et ve nis — Déte mination de la résista c de s r vê tement

a x imp cts de caillo x —

Partie 1: Essais de ch cs multiple s

S con edition

2 17-0

Refer ence n mb r

ISO 2 56 -1:2 17(E)

COPYRIGHT PROTECTED DOCUMENT

© ISO 2017, P blshed in Sw itz rlan

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the r eq eser

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CH-1 14 Vernier, Geneva, Switzerlan

Tel + 12 7 9 011

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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 2

6 Materials 3

7 Test panels 4

7.1 Subs r ate 4

7.2 Pr eparation an co ting 4

7.3 Thicknes of co ting 4

8 Proc ed re .4

8.1 Conditioning of the tes p nels 4

8.2 Tes con itions 4

8.3 Pr oje tion of g rit

4 9 Evaluatio 5

10 Precision 5

1 1 R epeatabi ty lmit, r 5

1 2 R eproducibi ty lmit, R 5

11 Test rep r t 6

A nne x A (informative)Examples of suitable pr oc edures for removin lo se paint 10

A nne x B (informative)Rec ommended pr oc edur e for calbration of test apparatus (e xaminatio of the damag ed ar ea) .11

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

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 se on edition canc ls an r plac s the firs edition (ISO 2 5 7-1:2 0 ), w hich has be n t ech icaly

r vised with the folowing main chang es:

— a ta le with the p rticle siz dis ribution of the grit mat erial has be n ad ed;

— a not e conc rning theuse of actual pr s ur g g es hasbe n ad ed t o Figur 2;

— theclauseon samplng has be n delet ed;

— thedesc iption of suita le methods for r mo al of lo se paint ha e be n trans e r d t o an informative

an ex as ex mplesan , for the method using ad esive ta e, the adhesive s r ngth of the ta e is no

long er spe if ied;

— this document is r vised edit orialy an the normative r fe enc s ha e be n updat ed

A l s of al p rt in theISO 2 5 7 se ies can be fou d on the ISO websit e

In the aut omo i e in us ry, multi-layer p int co tings ar a pled t o car b dies for prot ection Grit,

ro d-metal an othe mat erialscan damag e these co tings in such a wa that in ivid al la e s come of

or the w hole co ting delaminat es from the subs rat e

St one chip ing can be simulat ed b means of single- an / r multi-imp ct t es s ISO 2 5 7-1 desc ibes

multi-imp ct t es ing;ISO 2 5 7- 2 an ISO 2 5 7-3 desc ibe single-imp ct t es s

NOTE A recommen ed proced re for calibration of the ap aratus is given in An e B Note that his an e

is informative b cause the method des rib d in it is not the only one suita le for checking whether a u iform

impact patt ern is prod ced

P aints and varnishes — Determination ofstone-chip

Part 1:

This document spe if ies thr e methods for the ev luation of the r sis anc of automo i e f inishes

an othe co tings to chi led-iron grit proje ted onto the surfac u de tes to simulate the imp ct of

smal s ones

2 Normati ve r eferences

The folowing document ar r fe r d t o in the t ext in such a wa that some or al of their cont ent

cons itut es r q ir ment of this document F or dat ed r fe enc s, only the edition cit ed a ples F or

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

ISO 5 5, Tes t s ieves — Metal w ir cloth, pe frated metal plate a d elec troormed she t — Nomin l s i zes

o o enin s

ISO 1 14, Paint a d v rni shes — Sta dard p nels fr tes tin

ISO 2 0 , Paint a d v rni shes — Dete min tion o fim thicknes s

ISO 3 7 , Paints a d v rni shes a d their raw mate ial s — Tempe atur s a d h midities fr c onditio in

a d tes tin

ISO 1 1 4- 2, Prep ratio o s te l s ubs trates befr a plc atio o p int a d r lated produc ts —

S ec ific atio s fr metal c blas t-clea in a ras i ves — Part 2 : Chi ed-ro grit

ISO 1 1 5- 2, Prep ratio o s te l s ubs trates befr a plc atio o p ints a d r lated produc ts — Tes t

meth ds fr metal c blas t-clea in a ras i ves — Part 2 : Dete min tio o p rticle s i ze di s trib tio

ISO 2 2 7- 2:2 0 , Paints a d v rni shes — Ev lu tio o defec ts o c oated s urfc es us in o tic al ima in —

Part 2 : Ev lu tio proc edur fr multi mp c t s to e -chip in tes t

3 Terms and definitions

No t erms an def initions ar lst ed in this document

ISO an IEC maintain t erminolo ical data ases for use in s an ardization at the folowing ad r s es:

— IECEle tro edia: a aia le at ht p:/ www.ele tro edia.org

— ISO Onlne brow sing plat orm:a ai a le at ht p:/ www.iso.org o p

The st one-chip r sis anc of the co ting u de t es is che ked b proje ting a larg e n mbe of smal

sharp-edg ed b dies ont o it in a short pe iod of time The mat erial used in the t es is chi led-iron grit,

w hich is proje t ed ont o the co ting at a defined angle using compr s ed air The ext ent of the damag e

caused wi depen not only on the angle, but also on the pr s ur level, the mas of the proje ties, the

d ration of the b mb rdment an the design of the t es a p ratus

L ose fra ment of co ting mat erial ar r mo ed

The ext ent of the damag e is det ermined b comp rison with pict orial r fe enc s an ards

Ordinary la orat ory a p ratus, t og ethe with the folowing

5.1 Multiimpact tester

Figur 1 an Figur 2 show the t es a p ratus an it dimensions

The vibrating convey r car ies the grit rom the fun el int o the air blas in front of the grit-ac ele ating

noz le It shal be designed so that the grit fe d spe d can be v ried The a p ratus shal be ca a le of

proje ting 5 0 g of grit d ring a pe iod of 1 s The pr s ur chambe shal be larg e enough t o alow the

spe ified working pr s ur of 2 0 k a t o be held at a cons ant level for at leas 1 s w hie the solenoid

v lve iso en

Used grit can be taken from the grit-cat ching chambe aft er the t es an used a ain t o a l mit ed ext ent

( e 6.1)

10

11 1213

1415

Key

3 pres ur e red cer ( o working pr es ure) 1 g rit-ac elerating pipe (ac es ible fr om b ck for

5 manometer (in icates working pr es ur e) 1 pr otective housing

Figure 1 — Multi impact tester — General view

6

7

5

Key

— me sur ement r ang e: u to 40 kPa (=4 b r) — leng th: (2 5 ±3)mm

— diameter of s ale: 1 0 mm — inside diameter: (1 ± 1) mm

— ac ur acy: clas 1,0 — con ected to g rit-ac elerating pipe at ang le of

(45 ±1)° an distance of (3 ± 1)mm fr om tip of

air-ac elerating noz le

2 con ecting pipe

— leng th: (1 0 ± 1) mm

— inside diameter: (1 ± 0,2)mm 6 jet of g rit

3 air-ac eler ating noz le — distance fr om g rit-ac elerating pipe to centr e of

test panel (2 0 ±1)mm

— leng th: (8 ± 1)mm

— inside diameter at entry:(1 ± 0,2)mm — angle b twe n ax is of jet an test panel (54 ± 1)°

— inside diameter at ex it: (7 ±0,2)mm 7 apertur e

4 flang e an g rit-ac elerating pipe — 8 mm × 8 mm w in ow defining test ar ea on

test panel

— over al leng th: (3 2± 2)mm

— inside diameter: (3 ± 0,2)mm

NOTE Inst ead of the mechanical pres ure g ug des rib d u der point 1in Figure 2,an electronic pres ure

sensor with compara le data [e.g me suring rang u t o 60 k a (= 6 b r)/ac uracy clas 0,5] is oft en used

nowaday s an the working pres ure is in icat ed in a display

Figure 2 — Multi impact t ester — Detaied drawing and dimensions

6.1 Gr it

The grit

)

shal be chi ed-iron grit conforming t o the r q ir ment of ISO 1 1 4- 2, ex cept that the

particle siz , det ermined in ac ordanc with ISO 1 1 5- 2 an ISO 5 5, shal be as spe if ied in Ta le 1

1) For information a out g rit su plier , ple se contact the DIN Normenaus ch s Bes hichtu g sstofe u d

Bes hichtung en (NA B), B r g g rafenstraße 6, 1 787 Berlin, German

Table 1 — Particle size distributio

Mesh siz

mm

Fraction

%

a

a

a

To be disc rded

1 0 g of the col e t ed fractions in Ta le 1 shal contain 3 0± 2 grit particles

The grit shal be r plac d aft er a ma imum of 1 0 t es ru s Do not r plac the grit d ring an ong oing

se ies of t es s

7 Test panels

7.1 Substrate

Use t es p nels of at leas 1 0 mm × 1 0 mm in siz

7.2 Preparation and c oating

Pr p r each t es p nel in ac ordanc with ISO 1 14 befor co ting an drying or st oving Use the

a plcation method spe if ied b the p int man factur r

7.3 Thicknes of c oating

Det ermine the thick es , in mic ometr s, of the dry co ting b one of the proc d r s spe if ied in

ISO 2 0

8 Proc edure

8.1 Conditioning of the test panels

Con ition the t es p nels for at leas 1 h at 2 ± 2) °C an (5 ± 5) % r lative h midity befor car ying

out the t es ( in ac ordanc with ISO 3 7 )

8.2 Test c onditions

Car y out the t es at ro m t empe atur , i.e 1 °C t o 2 °C Stat e the t empe atur in the t es r p rt

Aft er con itioning, ensur that con ensation does not form prior t o or d ring the t es

8.3 Projection of g r it

L ad the t est er with 5 0

0 2 +

g ofgrit Car y out the t es using one of the set of conditions given in

Ta le 2 The method used shal be a r ed between the int er st ed p rties

Weigh the grit aft er each t es run ( i.e aft er each proje tion) an , if r q ir d, ad grit t o keep the t otal

mas at 5 0

0 2

+

g

Che k the length of time taken t o proje t the grit with a st opwat ch each time a new se ies of t es s is

s art ed an , if r q ir d, d ring an ong oing se ies of t es s

Aft er a ma imum of 1 0 t es ru s ( e 6.1), r plac the used grit with 5 0 g of fr sh grit Do not r plac

the grit d ring an ong oing se ies of t es s

R emo e any lo se p int from the t es ar a Ex mples of suita le methods ar given in An ex A The

method for r mo ing the lo se paint shal be a r ed betwe n the int er st ed p rtiesan shal be s at ed

in the t es r p rt

Table 2 — Test methods

Meth d

Pr s ur

k a a

Mas of grit

g

Time taken t o

proje t grit

s

2 × 5 0

0 2

2 ×(1 ±2)

2 × 5 0

0 2

2 ×(1 ±2)

C

2 0 ± 1

1 × 5 0

0 2

1 ± 2

folowed by, for e ample, cor osion or weathering e posure, then

immediately car y out he projection in ac ordance with 8.3using the

fol owing paramet er

2 0 ± 1

1 × 5 0

0 2

1 ± 2

a

10 k a = 1 bar

Ev luat e the damag e (br ak down or flaking) on the ex osed t es ar a b comp rison with the r fe enc

s an ards shown in Figur 3

NOTE T e f igures are showing the me n dama e of rating The u per an lower limit of dama ed are

shown in the f igures are determined in ISO 2 2 7-2:2 06, Ta le A.1

The comp rison can be done visual y or b means of o tical ima ing in ac ordanc with ISO 2 2 7- 2

The r fe enc s an ards r pr sent ratings from 0,5 t o 5,0 in st eps of 0,5 Es imat e an r cord

int ermediat e ratings asne es ary

In ad ition t o the degr e of chip ing, spe ify, if pos ible, the main sep ration level or the la e s of the

p int y st em betwe n w hich los of ad esion oc ur ed

Markings ar not ev luat ed

10 Precision

10.1 Repe tabi ity l mit , r

The r peata i ty l mit, r, is the v lue below w hich the a solut e dife enc betwe n two t es r sult can

be ex e t ed t o le, with a 9 % pro a i ity, w hen this method is used u de r peata i ty con itions,

i.e w hen the t es r sult ar o tained on identical mat erial b one o e at or in one la orat ory within a

short int erv l of time using the same a paratus

F or this method, r is 0,5on the rating scale

10.2 Reproducibi ity l mit , R

The r prod cibi ity l mit, R, is the v lue below w hich the a solut e dife enc betwe n two t es r sult ,

each the mean of d plcat es, can be ex e t ed t o le, with a 9 % pro a i ity, w hen this t es method is

used u de r prod cibi ty con itions, i.e w hen the t es r sult ar o tained on identical mat erial b

o e at ors in dife ent la orat ories using dife ent a paratus

F or this method, R is 1,0 on the rating scale

11 Test repor t

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

a) al detais ne es ary for complet e identif ication of the prod ct t est ed (man factur r, trade name,

bat ch n mbe , et c );

b) a r fe enc t o this document, i.e ISO 2 5 7-1;

c) thedetai s of the t es p nels, inclu ing

1) the detais of the subs rat e ( inclu ing mat erial an thick es ) an it surfac pr p ration,

2) the method used t o a ply the prod ct t o the subs rat e, inclu ing the drying time an drying

con itions for each la e ,

3) if a plca le, the con itions u de w hich the p nels we e ag ed,

4 ) the detai s of how the t es panels we e con itioned befor the t es an , if a plca le, detai s of

any t es s car ied out pr viously with the samet es p nels, an

5) the dry-film thick es of the co ting, in mic ometr s, an the method in ISO 2 0 used to measur

it , plus a note as to whethe the tested co ting consisted of a single la ye or seve al la e s;

d) the t es method used (A, B or C), as wel as for method C, only the detai s of the cor osion or

weathe ing ex osur con itions;

e) theambient t empe atur d ring the t est ;

f) thedetai s of the chi led-iron grit, inclu ing the man factur r, trade name an mean p rticle siz ;

g) thedetai s of the method used t o r mo e lo se paint ( e Annex A);

h) ther sult of the t es , as desc ibed in Clause 9;

i) any deviations from the proc d r spe ified;

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

k) thedat e of t es ing;

l) thename of thepe son w ho car ied out the t es