ISO 2160:1985
(Main)Petroleum products — Corrosiveness to copper — Copper strip test
Petroleum products — Corrosiveness to copper — Copper strip test
Produits pétroliers — Action corrosive sur le cuivre — Essai à la lame de cuivre
Naftni proizvodi - Korozivnost na baker - Preskus z bakrenim trakom
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International Standard 2160
INTFRNATIONAL ORGANIZATION FOR STANDARDIZATIONOME~YHAPO~HAR OPrAHH3AUHR il0 CTAH~APTH3AUUHWRGANlSATlON INTERNATIONALE DE NORMALISATION
Petroleum products - Corrosiveness to copper -
Copper strip test
Produits pétroliers - Action corrosive sur le cuivre - Essai à la lame de cuivre
Second edition - 1985-02-15
Ref. No. IS0 2160-1985 (E)
- UDC 665.7 : 620.193 : 546.56
!e
@
Descriptors : petroleum products, tests, corrosion tests, determination, copper, corrosion, test equipment.
5
Fi
Price based on 7 pages
s
---------------------- Page: 1 ----------------------
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 2160 was prepared by Technical Committee ISO/TC 28,
Petroleum products and lubricants.
IS0 2160 was first published in 1972. This second edition cancels and replaces the first
edition, of which it constitutes a technical revision.
0
International Organization for Standardization, 1985
Printed in Switzerland
---------------------- Page: 2 ----------------------
INTERNATIONAL STANDARD IS0 2160-1985 (E)
Petroleum products - Corrosiveness to copper -
Copper strip test
1 Scope and field of application
3.2 Copper strip
Copper strips 12,5 mm wide, 1,5 to 3,O mm thick, 75 mm long,
This International Standard specifies a method for the deter-
cut from smooth-surfaced, hard-temper, cold-finished, elec-
mination of the corrosive tendencies towards copper of
trolytic type copper of more than 99,9 % purity; electrical bus-
petroleum products such as aviation gasoline, aviation turbine
bar stock is generally suitable.
fuel, automotive gasoline, natural gasoline or other hydro-
carbons having a Reid vapour pressure no greater than 124 kPa
The strips may be used repeatedly but shall be discarded when
(1.24 bar), white spirits, cleaners (Stoddard) solvent, kerosene,
they show pitting or deep scratches that cannot be removed, or
diesel fuel, distillate heating oil, lubricating oil and certain other
when the surfaces become deformed on handling.
petroleum products.' )
3.3 Polishing materials
CAUTION - Some products, particularly natural
gasoline, may have a much higher vapour pressure than
Silicon-carbide abrasive paper of varying degrees of fineness
would normally be characteristic of automotive or avia-
65 pm (240 grit) paper or cloth, also supply of
including
tion gasolines. For this reason, extreme caution must be
105 pm (150 mesh) silicon-carbide powder, and pharma-
exercised to assure that the test bomb containing natural
ceutical grade absorbent cotton (cotton wool).
gasoline or other products of high vapour pressure is not
placed in the 100 OC bath. Samples having Reid vapour
pressures in excess of 124 kPa (1.24 bar) may develop suf-
4 Apparatus
ficient pressure at 100 OC to cause rupture of the test
bomb. For any sample having a Reid vapour pressure
4.1 Test bomb, constructed of stainless steel according to
above 124 kPa (1.24 bar), use IS0 6251, Liquefiedpetroleum
the dimensions shown in figure 1, and capable of withstanding
gases - Corrosiveness to copper - Copper strip test.
a test pressure of 700 kPa (7 bar) gauge. Alternative designs for
the bomb cap and synthetic rubber gasket may be used, pro-
vided that the internal dimensions of the bomb are the same as
those shown in figure 1.
2 Principle
L
A polished copper strip is immersed in a given quantity of 4.2 Test tubes, 25 mm x 150 mm, as liners for the test
sample and heated at a temperature and for a time specified for
bomb, to hold the samples.
the material being tested. At the end of this period, the copper
strip is removad, washed, and compared with corrosion stan- NOTE -- The capacity of some thin wall test tubes is such that the
dards. sample does not completely cover the copper strip. Such tubes should
not be used.
4.3 Water or other liquid baths, capable of being main-
3 Reagents and materials
tained at the specified test temperatures to within & 1 OC. The
normally specified temperatures for the different products are
given in section 8.1.2 through 8.1.6. The bath shall have
3.1 Wash solvent
suitable supports to hold the test bomb in a vertical position.
The bath shall be deep enough so that the entire bomb will be
Any volatile, sulphur-free hydrocarbon solvent may be used,
submerged during the test.
provided that it shows no tarnish when tested at 50 OC. Knock
test grade iso-octane is a suitable solvent and shall be used in
NOTE - Light has been found to have considerable influence on test
case of dispute. Details of the essential requirements of Knock
results. Therefore, the bath should be made of a non-transparent
test ;so-octane are given in the annex.
material.
1) A different method of evaluating corrosive tendencies of electrical insulating oils is given in IEC Publication 296, Specification for new insulating
oils for transformers and switchgear.
1
'=.
---------------------- Page: 3 ----------------------
IS0 2160-1985 (E)
Dimensions in millimetres
relief
3,Z wide groove for pressure
- 12 threads per in NF
Synthetic rubber thread or equivalent
"O" ring free -
from free sulphur
Chamfer inside cap to proteci
"O" ring when closing bomb
Seamless tube
Material : stainless steel
Welded construction
Maximum test pressure, gauge 700 kPa (7 bar)
Figure 1 - Test bomb for the copper strip corrosion test
2
---------------------- Page: 4 ----------------------
IS0 2160-1985 (E)
Table - Classification of corrosion standards
4.4 Water or oil bath, or aluminium block, capable of
being maintained at the specified test temperatures to within
Claççifi-
I 1 OC. The normally specified temperatures for the different
Designation Description *
cation
products are given in section 8.1.2 through 8.1.6. The bath
shall have suitable supports to hold the test tube (4.2) upright
Freshly
**
100 mm.
and submerged to a depth of about polished
strip
NOTE - Light has been found to have considerable influence on test
1 Slight a Light orange, almost the
results. Therefore, the bath should be made of a non-transparent
tarnish same as a freshly polished
material.
strip
b Dark orange
- ____-___-_
4.5 Polishing vice or holder, for holding copper strips
2 Moderate a Claret red
firmly without marring the edges while polishing. Any con-
tarnish
b Lavender
venient type of holder may be used provided that the strip is
held tightly and that the surface of the strip being polished is
C Multicoloured with lavende
supported above the surface of the holder. A suitable ap- blue and/or silver overlaid
on claret red
paratus is illustrated in figure 2.
d Silvery
e Brassy or gold
4.6 Viewing test tubes, flat, as shown in figure 3, for pro-
-
tecting corroded strips during close inspection or during
Dark tarnish a Magenta overcast on brass
storage.
strip
b Multicoloured with red and
green showing (peacock),
4.7 Thermometers, total immersion, for indicating the re-
but no grey
-
quired test temperature with the smallest graduations of 1 OC
4 Corrosion a Transparent black, dark grc
or less. No more than 25 mm of the mercury thread shall extend
or brown with peacock
above the surface of the bath at the test temperature. The
green barely showing
ASTM 12 C (12 FI or IP 64 C (64 Fi thermometers are suitable.
b Graphite or lustreless black
C Glossy or jet black
*
The corrosion standard is made up of strips characteristic of these
5 Corrosion standards
descriptions.
**
The corrosion standards') for this test consist of full-colour
The freshly polished strip is included in the series only as an indi-
reproductions, printed on aluminium sheets by a 4-colour
cation of the appearance of a properly polished strip before a test run.
process, of typical test strips representing increasing degrees of It is not possible to duplicate this appearance after a test with a com-
tarnish and corrosion (see the table). The reproductions are pletely noncorrosive sample.
encased for protection in plastics in the form of a plaque.
Directions for their use are given on the reverse side of each
plaque.
L
6 Preparation of test strips
The plastics-encased corrosion standards shall be protected
from light to avoid the possibility of fading. They shall be in-
6.1 Surface preparation
spected for fading by comparing two different plaques, one of
which has been carefully protected from light (new). Both sets
Remove all surface blemishes from all six sides of a copper
shall be observed in diffused daylight (or equivalent), first from
strip (3.2) with silicon-carbide paper (3.3) of such degrees of
a point directly above and then from an angle of 45'. If any
evidence of fading is observed, particularly at the left-hand end fineness as are needed to achieve the desired results efficiently.
Finish with 65 pm (240 grit) silicon-carbide paper or cloth,
of the plaque, it is suggested that the plaque be discarded.
removing all marks that may have been made by other grades
of paper used previously. Immerse the copper strip in wash
Alternatively, a 20 mm opaque strip (masking tape) shall be
solvent (3.1) from which it may be withdrawn immediately for
placed across the top of the colour portion of the plaque when
initially purchased. At intervals, the opaque strip shall be final polishing or in which it may be stored for future use.
removed and an examination made for any evidence of fading
it is sug-
of the exposed portion. If any fading has occurred,
As a practical manual procedure for surface preparation, place
gested that the corrosion standard be replaced.
a sheet of the abrasive paper on a flat surface, moisten it with
kerosine or wash solvent (3.1) and rub the copper strip aga
...
SLOVENSKI STANDARD
SIST ISO 2160:1996
01-marec-1996
Naftni proizvodi - Korozivnost na baker - Preskus z bakrenim trakom
Petroleum products -- Corrosiveness to copper -- Copper strip test
Produits pétroliers -- Action corrosive sur le cuivre -- Essai à la lame de cuivre
Ta slovenski standard je istoveten z: ISO 2160:1985
ICS:
75.080 Naftni proizvodi na splošno Petroleum products in
general
SIST ISO 2160:1996 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 2160:1996
---------------------- Page: 2 ----------------------
SIST ISO 2160:1996
International Standard 2160
INTFRNATIONAL ORGANIZATION FOR STANDARDIZATIONOME~YHAPO~HAR OPrAHH3AUHR il0 CTAH~APTH3AUUHWRGANlSATlON INTERNATIONALE DE NORMALISATION
Petroleum products - Corrosiveness to copper -
Copper strip test
Produits pétroliers - Action corrosive sur le cuivre - Essai à la lame de cuivre
Second edition - 1985-02-15
Ref. No. IS0 2160-1985 (E)
- UDC 665.7 : 620.193 : 546.56
!e
@
Descriptors : petroleum products, tests, corrosion tests, determination, copper, corrosion, test equipment.
5
Fi
Price based on 7 pages
s
---------------------- Page: 3 ----------------------
SIST ISO 2160:1996
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 technical committees. Each member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 2160 was prepared by Technical Committee ISO/TC 28,
Petroleum products and lubricants.
IS0 2160 was first published in 1972. This second edition cancels and replaces the first
edition, of which it constitutes a technical revision.
0
International Organization for Standardization, 1985
Printed in Switzerland
---------------------- Page: 4 ----------------------
SIST ISO 2160:1996
INTERNATIONAL STANDARD IS0 2160-1985 (E)
Petroleum products - Corrosiveness to copper -
Copper strip test
1 Scope and field of application
3.2 Copper strip
Copper strips 12,5 mm wide, 1,5 to 3,O mm thick, 75 mm long,
This International Standard specifies a method for the deter-
cut from smooth-surfaced, hard-temper, cold-finished, elec-
mination of the corrosive tendencies towards copper of
trolytic type copper of more than 99,9 % purity; electrical bus-
petroleum products such as aviation gasoline, aviation turbine
bar stock is generally suitable.
fuel, automotive gasoline, natural gasoline or other hydro-
carbons having a Reid vapour pressure no greater than 124 kPa
The strips may be used repeatedly but shall be discarded when
(1.24 bar), white spirits, cleaners (Stoddard) solvent, kerosene,
they show pitting or deep scratches that cannot be removed, or
diesel fuel, distillate heating oil, lubricating oil and certain other
when the surfaces become deformed on handling.
petroleum products.' )
3.3 Polishing materials
CAUTION - Some products, particularly natural
gasoline, may have a much higher vapour pressure than
Silicon-carbide abrasive paper of varying degrees of fineness
would normally be characteristic of automotive or avia-
65 pm (240 grit) paper or cloth, also supply of
including
tion gasolines. For this reason, extreme caution must be
105 pm (150 mesh) silicon-carbide powder, and pharma-
exercised to assure that the test bomb containing natural
ceutical grade absorbent cotton (cotton wool).
gasoline or other products of high vapour pressure is not
placed in the 100 OC bath. Samples having Reid vapour
pressures in excess of 124 kPa (1.24 bar) may develop suf-
4 Apparatus
ficient pressure at 100 OC to cause rupture of the test
bomb. For any sample having a Reid vapour pressure
4.1 Test bomb, constructed of stainless steel according to
above 124 kPa (1.24 bar), use IS0 6251, Liquefiedpetroleum
the dimensions shown in figure 1, and capable of withstanding
gases - Corrosiveness to copper - Copper strip test.
a test pressure of 700 kPa (7 bar) gauge. Alternative designs for
the bomb cap and synthetic rubber gasket may be used, pro-
vided that the internal dimensions of the bomb are the same as
those shown in figure 1.
2 Principle
L
A polished copper strip is immersed in a given quantity of 4.2 Test tubes, 25 mm x 150 mm, as liners for the test
sample and heated at a temperature and for a time specified for
bomb, to hold the samples.
the material being tested. At the end of this period, the copper
strip is removad, washed, and compared with corrosion stan- NOTE -- The capacity of some thin wall test tubes is such that the
dards. sample does not completely cover the copper strip. Such tubes should
not be used.
4.3 Water or other liquid baths, capable of being main-
3 Reagents and materials
tained at the specified test temperatures to within & 1 OC. The
normally specified temperatures for the different products are
given in section 8.1.2 through 8.1.6. The bath shall have
3.1 Wash solvent
suitable supports to hold the test bomb in a vertical position.
The bath shall be deep enough so that the entire bomb will be
Any volatile, sulphur-free hydrocarbon solvent may be used,
submerged during the test.
provided that it shows no tarnish when tested at 50 OC. Knock
test grade iso-octane is a suitable solvent and shall be used in
NOTE - Light has been found to have considerable influence on test
case of dispute. Details of the essential requirements of Knock
results. Therefore, the bath should be made of a non-transparent
test ;so-octane are given in the annex.
material.
1) A different method of evaluating corrosive tendencies of electrical insulating oils is given in IEC Publication 296, Specification for new insulating
oils for transformers and switchgear.
1
'=.
---------------------- Page: 5 ----------------------
SIST ISO 2160:1996
IS0 2160-1985 (E)
Dimensions in millimetres
relief
3,Z wide groove for pressure
- 12 threads per in NF
Synthetic rubber thread or equivalent
"O" ring free -
from free sulphur
Chamfer inside cap to proteci
"O" ring when closing bomb
Seamless tube
Material : stainless steel
Welded construction
Maximum test pressure, gauge 700 kPa (7 bar)
Figure 1 - Test bomb for the copper strip corrosion test
2
---------------------- Page: 6 ----------------------
SIST ISO 2160:1996
IS0 2160-1985 (E)
Table - Classification of corrosion standards
4.4 Water or oil bath, or aluminium block, capable of
being maintained at the specified test temperatures to within
Claççifi-
I 1 OC. The normally specified temperatures for the different
Designation Description *
cation
products are given in section 8.1.2 through 8.1.6. The bath
shall have suitable supports to hold the test tube (4.2) upright
Freshly
**
100 mm.
and submerged to a depth of about polished
strip
NOTE - Light has been found to have considerable influence on test
1 Slight a Light orange, almost the
results. Therefore, the bath should be made of a non-transparent
tarnish same as a freshly polished
material.
strip
b Dark orange
- ____-___-_
4.5 Polishing vice or holder, for holding copper strips
2 Moderate a Claret red
firmly without marring the edges while polishing. Any con-
tarnish
b Lavender
venient type of holder may be used provided that the strip is
held tightly and that the surface of the strip being polished is
C Multicoloured with lavende
supported above the surface of the holder. A suitable ap- blue and/or silver overlaid
on claret red
paratus is illustrated in figure 2.
d Silvery
e Brassy or gold
4.6 Viewing test tubes, flat, as shown in figure 3, for pro-
-
tecting corroded strips during close inspection or during
Dark tarnish a Magenta overcast on brass
storage.
strip
b Multicoloured with red and
green showing (peacock),
4.7 Thermometers, total immersion, for indicating the re-
but no grey
-
quired test temperature with the smallest graduations of 1 OC
4 Corrosion a Transparent black, dark grc
or less. No more than 25 mm of the mercury thread shall extend
or brown with peacock
above the surface of the bath at the test temperature. The
green barely showing
ASTM 12 C (12 FI or IP 64 C (64 Fi thermometers are suitable.
b Graphite or lustreless black
C Glossy or jet black
*
The corrosion standard is made up of strips characteristic of these
5 Corrosion standards
descriptions.
**
The corrosion standards') for this test consist of full-colour
The freshly polished strip is included in the series only as an indi-
reproductions, printed on aluminium sheets by a 4-colour
cation of the appearance of a properly polished strip before a test run.
process, of typical test strips representing increasing degrees of It is not possible to duplicate this appearance after a test with a com-
tarnish and corrosion (see the table). The reproductions are pletely noncorrosive sample.
encased for protection in plastics in the form of a plaque.
Directions for their use are given on the reverse side of each
plaque.
L
6 Preparation of test strips
The plastics-encased corrosion standards shall be protected
from light to avoid the possibility of fading. They shall be in-
6.1 Surface preparation
spected for fading by comparing two different plaques, one of
which has been carefully protected from light (new). Both sets
Remove all surface blemishes from all six sides of a copper
shall be observed in diffused daylight (or equivalent), first from
strip (3.2) with silicon-carbide paper (3.3) of such degrees of
a point directly above and then from an angle of 45'. If any
evidence of fading is observed, particularly at the left-hand end fineness as are needed to achieve the desired results efficiently.
Finish with 65 pm (240 grit) silicon-carbide paper or cloth,
of the plaque, it is suggested that the plaque be discarded.
removing all marks that may have been made by other grades
of paper used previously. Immerse the copper strip in wash
Alternatively, a 20 mm opaque strip (masking tape) shall be
solvent (3.1) from which it may be withdrawn immediately for
placed across the top of the colour portion of the plaque when
initially purchased. At intervals, the opaque strip shall be final polishing or in which it may be stored for future use.
removed and an examinati
...
Norme internationale @ 2160
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEXflYHAPOflHAR OPrAH!43AL&lR no CTAHLlAPTM3AUMM*ORGANlSATlON INTERNATIONALE DE NORMALISATION
Produits pétroliers - Action corrosive sur le cuivre -
\'
Essai à la lame de cuivre
Petroleum products - Corrosiveness to copper - Copper strip test
Deuxième édition - 1985-02-15
x U CDU 665.7 : 620.193 : 546.56 Réf. no : IS0 2160-1985 (FI
-
Ln
Descripteurs : produit pétrolier, essai. essai de corrosion, détermination, cuivre, corrosion, matériel d'essai.
5
Fk
i;j
O
E
Prix basé sur 7 pages
---------------------- Page: 1 ----------------------
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale
d'organismes nationaux de normalisation (comités membres de I'ISO). L'élaboration
des Normes internationales est confiée aux comités techniques de I'ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
créé à cet effet. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I'ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I'ISO. Les Normes internationales sont approuvées confor-
mément aux procédures de I'ISO qui requièrent l'approbation de 75 YO au moins des
comités membres votants.
La Norme internationale IS0 2160 a été élaborée par le comité technique ISO/TC 28,
Produits pétroliers et lubrifiants.
La Norme internationale IS0 2160 a été pour la première fois publiée en 1972. Cette
deuxième édition annule et remplace la première édition, dont elle constitue une révi-
sion technique.
O Organisation internationale de normalisation, 1985 O
Imprimé en Suisse
---------------------- Page: 2 ----------------------
IS0 2160-1985 (F)
NORM E INTER NAT1 ON ALE
Produits pétroliers - Action corrosive sur le cuivre -
Essai à la lame de cuivre
1 Objet et domaine d'application
en cas de litige. On trouvera dans l'annexe les valeurs des
caractéristiques de I'iso-octane de référence pour indice
La présente Norme internationale spécifie une méthode de
d'octane.
détermination de l'action corrosive des produits pétroliers sur le
cuivre, tels que essence aviation, carburéacteur, carburant
automobile, essence de gaz naturel ou autres hydrocarbures
3.2 Lame de cuivre
ayant une tension de vapeur Reid inférieure ou égale à 124 kPa
c (1,24 bar), white-spirit, produits de nettoyage, solvant
II s'agit de lames de cuivre de 12,5 mm de largeur, de 1,5 à
(Stoddart), pétrole lampant, combustible diesel, fuel-oil de dis-
3,O mm d'épaisseur et de 75 mm de longueur, découpées à par-
tillation, lubrifiants et certains autres produits pétroliers.')
tir de cuivre type électrolytique, poli, trempé, fini à froid, de
pureté supérieure à 99,9 %. Du cuivre pour barres omnibus
A'TTENTION - Certains produits, en particulier l'essence
donne généralement de bons résultats.
de gaz naturel, peuvent avoir une tension de vapeur très
supérieure à ce qui serait normalement caractéristique
Les lames peuvent être réutilisées plusieurs fois, mais elles doi-
des essences pour moteur d'automobile et avion. Pour
vent être jetées si elles présentent des piqûres ou des rayures
cette raison, il faut prendre soin de s'assurer que la
profondes qui ne peuvent être éliminées, ou encore quand leur
bombe utilisée pour les essais et contenant de l'essence
surface est déformée lors de leur manipulation.
naturelle ou d'autres produits présentant une tension de
vapeur élevée n'est pas placée dans le bain thermostati-
à 100 OC. Les échantillons ayant une tension de
que
3.3 Produits de polissage
vapeur Reid supérieure à 124 kPa (1.24 bar1 peuvent déve-
lopper à 100 OC une pression suffisante pour provoquer la
Papier abrasif au carbure de silicium, de différents degrés de
rupture de la bombe. Pour tout échantillon ayant une ten-
finesse, en particulier un papier ou un tissu de 65 pm
sion de vapeur Reid supérieure à 124 kPa (1,24 bar), utili-
(grain 240); on peut aussi utiliser de la poudre au carbure de
ser I'ISO 6251, Gaz de pétroles liquéfiés - Action corrosive
silicium de 105 pm (granulométrie 150 mesh), et du coton
sur le cuivre - Essai à la lame de cuivre.
absorbant qualité pharmaceutique (ouate).
2 Principe
4 Appareillage
Une lame de cuivre polie est immergée dans une quantité don-
née de prise d'essai, et chauffée à une température et pendant
4.1 Bombe pour essais, construite en acier inoxydable
une durée dépendant du produit à examiner. A la fin de cette
selon les dimensions présentées sur la figure 1 et pouvant résis-
période, la lame de cuivre est retirée, rincée puis comparée avec
ter à une pression d'essai (manométrique) de 700 kPa (7 bar).
les étalons de corrosion.
Le couvercle et le joint en caoutchouc synthétique peuvent être
remplacés par d'autres éléments, pourvu que les dimensions
intérieures de la bombe soient les mêmes que celles indiquées
sur la figure 1.
3 Réactifs et matériel
3.1 Solvant de nettoyage
4.2 Tubes à essais, 0 25 mm x 150 mm, garnissant la
bombe et destinés à contenir les échantillons.
On peut utiliser tout solvant à base d'hydrocarbure, volatil et
exempt de soufre, dans la mesure où il ne provoque aucune ter-
NOTE - La capacité de certains tubes à essais à paroi mince est telle
nissure à 50 OC. L'iso-octane employé pour la mesure de
que l'échantillon ne peut entièrement recouvrir la lame de cuivre. Ce
l'indice d'octane est un solvant convenable, et doit être utilisé
type de tube ne doit pas être utilisé.
1 i On trouvera dans la Publication CE1 296, Spécifications des huiles isolan 'tes neuves pour transformateurs et appareillages, une méthode différente
d'évaluation de la tendance des huiles isolantes électriques à la corrosion.
1
---------------------- Page: 3 ----------------------
IS0 2160-1985 (FI
Dimensions en millimètres
,- Oeillet de levage
3,2 Large rainure pour détente
Bouchon moleté
12 filets par pouce NF ou équivalent
Joint torique en
caoutchouc synthétique -
sans soufre libre
Chanfreiner l'intérieur du couvercle pour protéger
le joint torique lors de la fermeture de la bombe
Tube sans soudure
Matériau : acier inoxydable
Construction soudée
Pression maximale d'essai (relative) : 700 kPa (7 bar)
Figure 1 - Bombe servant à l'essai de corrosion à la lame de cuivre
2
---------------------- Page: 4 ----------------------
IS0 2160-1985 (FI
aura été soigneusement protégée de la lumière (plaque neuve).
4.3 Bain thermostatique, type bain-marie ou à autre
Les deux ensembles de plaques doivent être observés à la
liquide, pouvant être maintenu à la température d'essai requise
lumière du jour diffuse (ou équivalent), tout d'abord à partir
à i: 1 OC. Les températures normalement retenues pour les dif-
d'un point situé directement au-dessus des plaques, puis selon
férents produits sont données en 8.1.2 à 8.1.6. Le bain doit être
un angle de 45O. Si l'on constate une quelconque altération des
muni de supports appropriés permettant de maintenir la bombe
couleurs, en particulier à l'extrémité gauche de la plaque, il est
en position verticale. Le bain doit être suffisamment profond
recommandé d'éliminer cette plaque.
pour que la totalité de la bombe soit immergée pendant l'essai.
NOTE ~~ II s'est avéré que la lumière avait une influence considérable On peut aussi placer une bande opaque de 20 mm (cache) en
sur les résultats d'essai. Le bain doit donc être en un matériau non
travers de la partie supérieure de la partie référence colorée de
tranwarent.
la plaque lors de son achat. De temps en temps, on enlèvera la
bande opaque, et on recherchera toute manifestation d'une
altération des couleurs de la partie exposée. Si l'on constate
4.4 Bain-marie ou bain d'huile ou bloc d'aluminium,
une altération des couleurs, il est recommandé de remplacer
assurant la régulation aux températures requises à k 1 OC. Les
l'étalon de corrosion.
températures normalement retenues sont données en 8.1.2 à
8.1.6. Le bain doit être muni de supports appropriés permettant
de maintenir le tube à essais (4.2) en position verticale et Si la surface du revêtement plastique présente trop de rayures,
il est suggéré de remplacer l'étalon de corrosion.
immergé à une profondeur d'environ 100 rnm.
NOTE - II s'est avéré que la lumière avait une influence considérable
Le bain doit donc être en un matériau non
sur les résultats d'essai.
transparent.
Tableau - Classification des lames étalons
4.5 Étau ou support de polissage, pour maintenir ferme- Classifi- Désignati
Description *
cation de la lam
ment les lames de cuivre, sans abîmer les bords pendant le
polissage. On peut utiliser tout type commode de support, à la
Lame
**
-
condition que la lame soit fermement tenue et que la surface de
fraîchement
la lame en cours de polissage soit soutenue au-dessus de la sur- polie
-
face du support. La figure 2 représente un appareil pouvant
1 Ternissem' a Orangé léger, presque
être utilisé.
semblable à une lame
léger
fraîchement polie
4.6 Tube à essais, pour examen, plat, comme indiqué sur la
b Orangé foncé
.~ -
figure 3, pour protéger les lames après essai, pour les examiner
2 Ternissem
a Rouge bordeaux
et les conserver.
modéré
b Lavande
C Colorations multiples avec
4.7 Thermomètres, à immersion totale, destinés à indiquer
bleu lavande etiou argent
la température requise, présentant un intervalle de graduation
sur rouge bordeaux
inférieur ou égal au degré. La colonne de mercure émergeant
de la surface du bain à la température de l'essai ne doit pas d Argenté
dépasser 25 mm. Les thermomètres ASTM 12 C (12 F) ou
e Bronze ou doré
~ -
64 C (64 F) conviennent.
IP
3 Ternissem Pellicule magenta sur lame
a
foncé
bronzée
b Colorations multiples avec
5 Étalons de corrosion
présence de rouge et de vert
(irisation) mais pas de gris
Les étalons de corrosion') utilisés pour cet essai sont consti-
4 Corrosion a Noir transparent, gris foncé
tués par des reproductions en couleur, imprimées sur des
ou brun, avec vert irisé
feuilles d'aluminium par un procédé en quadrichromie, de
découvert
lames d'essai caractéristiques présentant des degrés croissants
b Noir graphité ou mat
de ternissure et de corrosion (voir le tableau). Pour les protéger,
les reproductions sont enrobées dans une masse de matière
c Noir brillant ou noir de jais
plastique se présentant sous la forme d'une plaque. Au dos de
Les lames étalons de corrosion correspondent aux descriptions
chaque plaque sont données les instructions d'emploi.
données sur le tableau.
**
Les étalons de corrosion enrobés dans de la matière plastique
La lame fraîchement polie n'est présentée dans la série ci-dessus
doivent être protégés de la lumière pour supprimer le risque
qu'à titre d'indication de l'aspect d'une lame convenablement polie
d'altération des couleurs. II faut contrôler l'altération des cou- avant un essai. II n'est pas possible d'avoir de nouveau cet aspect après
leurs, par comparaison de deux plaques différentes, dont l'une un essai, même avec un échantillon entièrement non corrosif.
__~~ -
II Disponible auprès du siège de I'ASTM 1916 Race Street, Philadelphie, Pennsylvanie 19103, USA
3
---------------------- Page: 5 ----------------------
IS0 2160-1985 (FI
Dimensions en millimètres
120
c W
18 17,5 17,s 17,5 17,s
12J
L
0 Matériau : laiton
Filetage métrique
Q 5 ou équivalent 7
L-
t
a
Matériau : matière plastique
B- B
'p
\
Ecrou à oreilles
A-A avec vis
44-
8,, P
0 Matériau : laiton
z- I
A- A
Figure 2 - Étau pour plusieurs lames
4
---------------------- Page: 6 ----------------------
IS0 2160-1985 (FI
6.2 Polissage final
Dimensions en millimètres
Extraire une lame du solvant de nettoyage. Tout en la mainte-
I Dimensions minimales devant permettre
nant
...
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