SIST EN ISO 17092:2023
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of corrosion resistance of monolithic ceramics in acid and alkaline solutions (ISO 17092:2005)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of corrosion resistance of monolithic ceramics in acid and alkaline solutions (ISO 17092:2005)
ISO 17092:2005 describes the test method for determining the corrosion resistance of fine ceramics in acid and alkaline solutions, such as sulfuric acid and sodium hydroxide. This International Standard is designed to provide an assessment of the mass changes and dimensional changes of test specimens following the corrosion test immersed in the corrosive liquids, and to assess whether corrosion has a significant effect on the subsequent strength. This test method may be used for development of materials, quality control, characterization, and design-data generation purposes.
Hochleistungskeramik - Bestimmung der Korrosionsbeständigkeit von monolithischen Keramiken in sauren und alkalischen Lösungen (ISO 17092:2005)
Diese Internationale Norm beschreibt das Prüfverfahren zur Bestimmung der Korrosionsbeständigkeit von Hochleistungskeramik in sauren und alkalischen Lösungen wie Schwefelsäure und Natriumhydroxid. Diese Internationale Norm ist dafür vorgesehen, eine Beurteilung der Massenänderungen und Maßänderungen von Probekörpern nach der Korrosionsprüfung, bei der sie in die korrosiven Flüssigkeiten getaucht werden, vorzunehmen, und festzustellen, ob die Korrosion einen signifikanten Einfluss auf die spätere Festigkeit hat. Dieses Prüfverfahren ist anwendbar für die Zwecke der Werkstoffentwicklung, der Qualitätskontrolle, der Charakterisierung und der Erstellung von Konstruktionsdaten.
ANMERKUNG Die in dieser Norm in { } angegebenen Einheiten und numerischen Werte basieren auf anerkannten Einheiten und sind zusätzlich zur Information angegeben.
Céramiques techniques - Détermination de la résistance à la corrosion des céramiques monolithiques dans des solutions acides et alcalines (ISO 17092:2005)
La présente Norme internationale décrit la méthode d’essai permettant de déterminer la résistance à la corrosion des céramiques techniques dans des solutions acides ou alcalines, telles que des solutions d’acide sulfurique ou d’hydroxyde de sodium. La présente Norme internationale est destinée à permettre une évaluation des variations de masse et de dimensions d’éprouvettes ayant été soumises à un essai de corrosion par immersion dans des liquides corrosifs, ainsi qu’une évaluation de l’effet plus ou moins prononcé de la corrosion sur la résistance ultérieure desdites éprouvettes. La présente méthode d’essai peut être utilisée à des fins de développement de matériaux, de contrôle de la qualité, de caractérisation et de génération de données de conception.
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Ugotavljanje korozijske odpornosti monolitne keramike v kislih in alkalnih raztopinah (ISO 17092:2005)
Standard ISO 17092:2005 opisuje preskusno metodo za določanje odpornosti fine keramike proti koroziji v kislih in alkalnih raztopinah, kot sta žveplova kislina in natrijev hidroksid. Ta mednarodni standard je oblikovan tako, da zagotavlja oceno spremembe mase in dimenzij preskusnih vzorcev po preskusu korozije s potopitvijo v korozivne tekočine, in za ocenjevanje, ali ima korozija bistveni vpliv na nadaljnje močne lastnosti. Ta preskusna metoda se lahko uporablja za razvoj materialov, nadzor kakovosti, določanje lastnosti in namene ustvarjanja podatkov o zasnovi.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 17092:2023
01-maj-2023
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Ugotavljanje
korozijske odpornosti monolitne keramike v kislih in alkalnih raztopinah (ISO
17092:2005)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of
corrosion resistance of monolithic ceramics in acid and alkaline solutions (ISO
17092:2005)
Hochleistungskeramik - Bestimmung der Korrosionsbeständigkeit von monolithischen
Keramiken in sauren und alkalischen Lösungen (ISO 17092:2005)
Céramiques techniques - Détermination de la résistance à la corrosion des céramiques
monolithiques dans des solutions acides et alcalines (ISO 17092:2005)
Ta slovenski standard je istoveten z: EN ISO 17092:2023
ICS:
81.060.30 Sodobna keramika Advanced ceramics
SIST EN ISO 17092:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 17092:2023
---------------------- Page: 2 ----------------------
SIST EN ISO 17092:2023
EN ISO 17092
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2023
EUROPÄISCHE NORM
ICS 81.060.30 Supersedes EN 12923-1:2006
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Determination of corrosion resistance of
monolithic ceramics in acid and alkaline solutions (ISO
17092:2005)
Céramiques techniques - Détermination de la Hochleistungskeramik - Bestimmung der
résistance à la corrosion des céramiques Korrosionsbeständigkeit von monolithischen
monolithiques dans des solutions acides et alcalines Keramiken in sauren und alkalischen Lösungen (ISO
(ISO 17092:2005) 17092:2005)
This European Standard was approved by CEN on 10 March 2023.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 17092:2023 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 17092:2023
EN ISO 17092:2023 (E)
Contents Page
European foreword . 3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 17092:2023
EN ISO 17092:2023 (E)
European foreword
The text of ISO 17092:2005 has been prepared by Technical Committee ISO/TC 206 "Fine ceramics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 17092:2023
by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by
DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2023, and conflicting national standards
shall be withdrawn at the latest by September 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12923-1:2006.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 17092:2005 has been approved by CEN as EN ISO 17092:2023 without any modification.
3
---------------------- Page: 5 ----------------------
SIST EN ISO 17092:2023
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SIST EN ISO 17092:2023
INTERNATIONAL ISO
STANDARD 17092
First edition
2005-11-01
Fine ceramics [advanced ceramics,
advanced technical ceramics] —
Determination of corrosion resistance of
monolithic ceramics in acid and alkaline
solutions
Céramiques techniques — Détermination de la résistance à la corrosion
des céramiques monolithiques dans des solutions acides et alcalines
Reference number
ISO 17092:2005(E)
©
ISO 2005
---------------------- Page: 7 ----------------------
SIST EN ISO 17092:2023
ISO 17092:2005(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 2005
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2005 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 17092:2023
ISO 17092:2005(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Apparatus . 2
5 Test solutions. 2
6 Test specimens . 3
7 Test procedure . 3
8 Calculations. 4
9 Test report . 5
Annex A (informative) General information. 6
Annex B (informative) Interlaboratory evaluation of the test method . 7
Bibliography . 9
© ISO 2005 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 17092:2023
ISO 17092:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 17092 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2005 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 17092:2023
INTERNATIONAL STANDARD ISO 17092:2005(E)
Fine ceramics [advanced ceramics, advanced technical
ceramics] — Determination of corrosion resistance of
monolithic ceramics in acid and alkaline solutions
1 Scope
This International Standard describes the test method for determining the corrosion resistance of fine
ceramics in acid and alkaline solutions, such as sulfuric acid and sodium hydroxide. This International
Standard is designed to provide an assessment of the mass changes and dimensional changes of test
specimens following the corrosion test immersed in the corrosive liquids, and to assess whether corrosion has
a significant effect on the subsequent strength. This test method may be used for development of materials,
quality control, characterization, and design-data generation purposes.
NOTE The units and numerical values given in { } in this standard are based on traditional units and are appended
for information.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3611, Micrometer callipers for external measurement
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions
and surface texture parameters
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
ISO 6906, Vernier callipers reading to 0,02 mm
ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Verification and calibration of the force-measuring system
ISO 14704:2000, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for
flexural strength of monolithic ceramics at room temperature
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
corrosion resistance
resistance against corrosion of fine ceramic material due to reaction with corrosive species in the surrounding
environment, including chemical reactions at grain boundaries and secondary phases
© ISO 2005 – All rights reserved 1
---------------------- Page: 11 ----------------------
SIST EN ISO 17092:2023
ISO 17092:2005(E)
3.2
flexural strength
maximum nominal stress at fracture of a specified elastic beam loaded in bending
4 Apparatus
4.1 Corrosion testing apparatus, for example, any suitable apparatus capable of maintaining the test
solution in a quiet boiling state and also maintaining the test solution at a constant concentration
The test container shall be made of glass or polytetrafluoroethylene, and shall have a capacity of about 1 litre.
The test container should be connected to a glass vertical-type condenser, having a sufficient cooling area, by
a tapered ground joint. The test apparatus shall be equipped with a thermometer for monitoring the solution
temperature. Since the severe boiling state may cause mechanical damage to test specimens, the “quiet
boiling state” is preferable.
NOTE 1 A device, such as a basket or a system of suspension wires resistant to the corrosive medium, may be used to
prevent contact between test specimens, and to raise them off the bottom of the vessel.
Alternatively, the test specimens may be placed in a PTFE-lined chemical digestion vessel with the reagent, sealed and
heated to the required test temperature. If this approach is employed, it shall be recorded in the test report.
NOTE 2 “Quiet boiling” refers to the level of bubble (vapour) formation in the liquid at a low enough level and frequency
to eliminate movement of the test specimen.
4.2 Drying device, for example an oven, capable of achieving constant mass of the test specimens by
maintaining a temperature of 105 °C to 120 °C.
4.3 Testing machine for flexural strength, capable of applying a uniform crosshead speed. The testing
machine shall be in accordance with ISO 7500-1, with an accuracy of 1 % of the indicated force at fracture.
4.4 Test fixture for flexural strength, of three- or four-point flexure configuration in accordance with 5.2 of
ISO 14704:2000.
NOTE The recommended fixture is fully articulated and of the four-point-1/4 point configuration with the two outer
bearings at a distance of 40 mm. The corresponding total length of the test specimen is 45 mm or more.
4.5 Micrometer, such as that shown in ISO 3611 but with a resolution of 0,002 mm for measuring the
specimen dimensions. The micrometer shall have flat anvil faces such as those shown in ISO 3611. The
micrometer shall not have a ball tip or sharp tip, since these might damage the specimen. Alternative
dimension-measuring instruments may be used, provided that they have a resolution of 0,002 mm or finer.
4.6 Vernier callipers, in accordance with ISO 6906, with a resolution of 0,05 mm or finer for measuring the
length of the test specimen. Alternative dimension-measuring instruments may be used, provided that they
have a resolution of 0,05 mm or finer.
4.7 Balance, with a sensitivity of at least 0,1 mg.
5 Test solutions
Sulfuric acid or sodium hydroxide solution is used for the test solution. For sulfuric acid solution, prepare the
solution of 3 mol/l {6 N} concentration with guaranteed reagent as specified in ISO 6353-2, and distilled water
or demineralized water as specified in ISO 3696. For sodium hydroxide solution, prepare the solution of
6 mol/l {6 N} concentration with guaranteed reagent as specified in ISO 6353-2 and distilled water or
demineralized water. For solutions other than sulfuric acid and sodium hydroxide, prepare the solution of
which the concentration becomes 3 mol/l. It is recommended to use the solution volume of 0,5 litre for each
corrosion test.
2 © ISO 2005 – All rights reserved
---------------------- Page: 12 ----------------------
SIST EN ISO 17092:2023
ISO 17092:2005(E)
SAFETY PRECAUTIONS — Appropriate safety precautions must be employed when preparing and
handling these solutions.
6 Test specimens
The test specimen for the corrosion test shall be prepared in accordance with Clause 6 of ISO 14704:2000.
The standard test specimens shall have cross-sectional dimensions of 3,00 mm ± 0,20 mm thickness, and
4,00 mm ± 0,20 mm width. The length shall be more than 35 mm for 30 mm test fixtures or more than 45 mm
for 40 mm test fixtures. All the surfaces shall be machined, and the surface roughness shall be not more than
0,2 µmRa as defined in ISO 4287. Edges shall be rounded or chamfered. Any machining procedure and the
surface quality of the test specimens shall be reported. The minimum number of test specimens shall be 10
for each corrosion condition to be tested, and at least 10 test specimens shall be used for flexural strength
measurements before the
...
SLOVENSKI STANDARD
oSIST prEN ISO 17092:2023
01-januar-2023
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Ugotavljanje
korozijske odpornosti monolitne keramike v kislih in alkalnih raztopinah (ISO
17092:2005)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Determination of
corrosion resistance of monolithic ceramics in acid and alkaline solutions (ISO
17092:2005)
Hochleistungskeramik - Bestimmung der Korrosionsbeständigkeit von monolithischen
Keramiken in sauren und alkalischen Lösungen (ISO 17092:2005)
Céramiques techniques - Détermination de la résistance à la corrosion des céramiques
monolithiques dans des solutions acides et alcalines (ISO 17092:2005)
Ta slovenski standard je istoveten z: prEN ISO 17092
ICS:
81.060.30 Sodobna keramika Advanced ceramics
oSIST prEN ISO 17092:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 17092:2023
---------------------- Page: 2 ----------------------
oSIST prEN ISO 17092:2023
INTERNATIONAL ISO
STANDARD 17092
First edition
2005-11-01
Fine ceramics [advanced ceramics,
advanced technical ceramics] —
Determination of corrosion resistance of
monolithic ceramics in acid and alkaline
solutions
Céramiques techniques — Détermination de la résistance à la corrosion
des céramiques monolithiques dans des solutions acides et alcalines
Reference number
ISO 17092:2005(E)
©
ISO 2005
---------------------- Page: 3 ----------------------
oSIST prEN ISO 17092:2023
ISO 17092:2005(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 2005
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2005 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 17092:2023
ISO 17092:2005(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Apparatus . 2
5 Test solutions. 2
6 Test specimens . 3
7 Test procedure . 3
8 Calculations. 4
9 Test report . 5
Annex A (informative) General information. 6
Annex B (informative) Interlaboratory evaluation of the test method . 7
Bibliography . 9
© ISO 2005 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 17092:2023
ISO 17092:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 17092 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2005 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 17092:2023
INTERNATIONAL STANDARD ISO 17092:2005(E)
Fine ceramics [advanced ceramics, advanced technical
ceramics] — Determination of corrosion resistance of
monolithic ceramics in acid and alkaline solutions
1 Scope
This International Standard describes the test method for determining the corrosion resistance of fine
ceramics in acid and alkaline solutions, such as sulfuric acid and sodium hydroxide. This International
Standard is designed to provide an assessment of the mass changes and dimensional changes of test
specimens following the corrosion test immersed in the corrosive liquids, and to assess whether corrosion has
a significant effect on the subsequent strength. This test method may be used for development of materials,
quality control, characterization, and design-data generation purposes.
NOTE The units and numerical values given in { } in this standard are based on traditional units and are appended
for information.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 3611, Micrometer callipers for external measurement
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions
and surface texture parameters
ISO 6353-2, Reagents for chemical analysis — Part 2: Specifications — First series
ISO 6906, Vernier callipers reading to 0,02 mm
ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Verification and calibration of the force-measuring system
ISO 14704:2000, Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for
flexural strength of monolithic ceramics at room temperature
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
corrosion resistance
resistance against corrosion of fine ceramic material due to reaction with corrosive species in the surrounding
environment, including chemical reactions at grain boundaries and secondary phases
© ISO 2005 – All rights reserved 1
---------------------- Page: 7 ----------------------
oSIST prEN ISO 17092:2023
ISO 17092:2005(E)
3.2
flexural strength
maximum nominal stress at fracture of a specified elastic beam loaded in bending
4 Apparatus
4.1 Corrosion testing apparatus, for example, any suitable apparatus capable of maintaining the test
solution in a quiet boiling state and also maintaining the test solution at a constant concentration
The test container shall be made of glass or polytetrafluoroethylene, and shall have a capacity of about 1 litre.
The test container should be connected to a glass vertical-type condenser, having a sufficient cooling area, by
a tapered ground joint. The test apparatus shall be equipped with a thermometer for monitoring the solution
temperature. Since the severe boiling state may cause mechanical damage to test specimens, the “quiet
boiling state” is preferable.
NOTE 1 A device, such as a basket or a system of suspension wires resistant to the corrosive medium, may be used to
prevent contact between test specimens, and to raise them off the bottom of the vessel.
Alternatively, the test specimens may be placed in a PTFE-lined chemical digestion vessel with the reagent, sealed and
heated to the required test temperature. If this approach is employed, it shall be recorded in the test report.
NOTE 2 “Quiet boiling” refers to the level of bubble (vapour) formation in the liquid at a low enough level and frequency
to eliminate movement of the test specimen.
4.2 Drying device, for example an oven, capable of achieving constant mass of the test specimens by
maintaining a temperature of 105 °C to 120 °C.
4.3 Testing machine for flexural strength, capable of applying a uniform crosshead speed. The testing
machine shall be in accordance with ISO 7500-1, with an accuracy of 1 % of the indicated force at fracture.
4.4 Test fixture for flexural strength, of three- or four-point flexure configuration in accordance with 5.2 of
ISO 14704:2000.
NOTE The recommended fixture is fully articulated and of the four-point-1/4 point configuration with the two outer
bearings at a distance of 40 mm. The corresponding total length of the test specimen is 45 mm or more.
4.5 Micrometer, such as that shown in ISO 3611 but with a resolution of 0,002 mm for measuring the
specimen dimensions. The micrometer shall have flat anvil faces such as those shown in ISO 3611. The
micrometer shall not have a ball tip or sharp tip, since these might damage the specimen. Alternative
dimension-measuring instruments may be used, provided that they have a resolution of 0,002 mm or finer.
4.6 Vernier callipers, in accordance with ISO 6906, with a resolution of 0,05 mm or finer for measuring the
length of the test specimen. Alternative dimension-measuring instruments may be used, provided that they
have a resolution of 0,05 mm or finer.
4.7 Balance, with a sensitivity of at least 0,1 mg.
5 Test solutions
Sulfuric acid or sodium hydroxide solution is used for the test solution. For sulfuric acid solution, prepare the
solution of 3 mol/l {6 N} concentration with guaranteed reagent as specified in ISO 6353-2, and distilled water
or demineralized water as specified in ISO 3696. For sodium hydroxide solution, prepare the solution of
6 mol/l {6 N} concentration with guaranteed reagent as specified in ISO 6353-2 and distilled water or
demineralized water. For solutions other than sulfuric acid and sodium hydroxide, prepare the solution of
which the concentration becomes 3 mol/l. It is recommended to use the solution volume of 0,5 litre for each
corrosion test.
2 © ISO 2005 – All rights reserved
---------------------- Page: 8 ----------------------
oSIST prEN ISO 17092:2023
ISO 17092:2005(E)
SAFETY PRECAUTIONS — Appropriate safety precautions must be employed when preparing and
handling these solutions.
6 Test specimens
The test specimen for the corrosion test shall be prepared in accordance with Clause 6 of ISO 14704:2000.
The standard test specimens shall have cross-sectional dimensions of 3,00 mm ± 0,20 mm thickness, and
4,00 mm ± 0,20 mm width. The length shall be more than 35 mm for 30 mm test fixtures or more than 45 mm
for 40 mm test fixtures. All the surfaces shall be machined, and the surface roughness shall be not more than
0,2 µmRa as defined in ISO 4287. Edges shall be rounded or chamfered. Any machining procedure and the
surface quality of the test specimens shall be reported. The minimum number of test specimens shall be 10
for each corrosion condition to be tested, and at least 10 test specimens shall be used for flexural strength
measurements before the corrosion test. Means shall be taken to identify individually similar test specimens,
but shall not be marked or scribed in a way that might affect the result of the test. If strength changes are not
to be determined, any test specimens in terms of size and shape may be used.
NOTE A graphite pencil mark may be a suitable means of marking test specimens of most types.
7 Test procedure
7.1 Measurements of dimensions and mass of specimens
Measure the width (b) and thickness (h) of each test specimen at several places using the micrometer (4.5)
with a resolution of 0,002 mm. Measure the overall length (L ) with the vernier callipers (4.6) with a resolution
T
of 0,05 mm. For other shapes of test specimen, measure relevant dimensions at several different places (e.g.
diameter and thickness of a disc). Wash and degrease the test specimens. Place in the oven (4.2) and heat to
a temperature of 105 °C to 120 °C until their mass is constant. Remove and store in a desiccator. When
cooled to room temperature, weigh each to the nearest 0,1 mg using the balance (4.7). Store in the desiccator
until tested.
NOTE For the majority of fine ceramics (advanced ceramics, advanced technical ceramics), the washing and
degreasing conditions have little effect on the subsequent corrosion properties, and water and solvents are removed by
the subsequent oven treatment. However, some materials, e.g. boron nitride or beta-alumina, may be influenced by any
washing process. Care should be taken to ensure that any cleaning process used does not affect the results of the
corrosion test.
7.2 Corrosion test
Heat the test container (4.1) filled with test solution to a quiet boiling state. Then place the test specimens
gently on the bottom of the container and maintain the boiling state continuously for 24 h. The test specimens
allowed in a single container are of the same material and the maximum number of test specimens is ten.
New test solution shall be used in every test. After conducting the corrosion test, take the test specimen out
from the test container, and wash sufficiently with distilled or demineralized water. Dry at 10
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