ISO 9812:2024
(Main)Corrosion of metals and alloys — Corrosion test method for disinfectant — Spray test method
Corrosion of metals and alloys — Corrosion test method for disinfectant — Spray test method
This document specifies an aerosol spray method for testing the corrosivity of disinfectants against metallic materials. The test method involves the cyclic exposure of test specimens to a mist of disinfectant and to a ventilation condition. After the cycles, the specimens are studied to identify if there is a change in mass, or changes to the specimen surface. This document provides details on the instruments, reagents, preparation and pretreatment of the test specimens, test conditions, test methods, calculation of corrosion rate, reports, etc. A feature of this document is a corrosion test method which can stimulate exposure to the real disinfection environment for metal materials. This document is applicable to the determination of corrosion of disinfectant aerosol spray to metal materials.
Corrosion des métaux et alliages — Méthode d'essai de corrosion pour les désinfectants — Méthode d'essai par pulvérisation
General Information
Standards Content (Sample)
International
Standard
ISO 9812
First edition
Corrosion of metals and alloys —
2024-10
Corrosion test method for
disinfectant — Spray test method
Corrosion des métaux et alliages — Méthode d'essai de corrosion
pour les désinfectants — Méthode d'essai par pulvérisation
Reference number
© ISO 2024
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ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 Test cabinet .2
4.2 Spray equipment .2
4.3 Specimen supporting device .2
4.4 Oven.2
4.5 Analytical balance .2
4.6 Vernier caliper .3
5 Reagents and materials . 3
5.1 Experimental water .3
5.2 Acetone .3
5.3 Ethanol .3
5.4 Abrasive paper .3
6 Test specimens . 3
7 Pretreatment of test specimens . 3
8 Arrangement of the test specimens . 3
9 Operation condition . 4
9.1 Test environment .4
9.2 Disinfectant solution concentration and the disinfectant solution usage .4
9.3 Temperature .4
9.4 Duration of the test .4
10 Procedure . 5
11 Calculation of the corrosion rate . 6
12 Report . 6
Annex A (normative) Result of corrosion test . 7
Annex B (informative) Schematic diagram of test cabinet associated apparatus for disinfectant
corrosion test in the spray condition . 8
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.
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iv
Introduction
Disinfection is an important means to prevent the spread of infectious diseases. However, there is no
standard on detecting the corrosiveness of disinfectants using the spray method. And, in the current
environment, it is highly practical to establish International Standards on the spray test method for the
corrosiveness of disinfectants. This document provides a basis for the corrosion detection of disinfectants
and helps prevent potential hazards caused by the improper use of disinfectants worldwide.
v
International Standard ISO 9812:2024(en)
Corrosion of metals and alloys — Corrosion test method for
disinfectant — Spray test method
WARNING — This document does not purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this document to establish appropriate safety and
health practices and determine the applicability of regulatory limitations prior to use.
1 Scope
This document specifies an aerosol spray method for testing the corrosivity of disinfectants against metallic
materials. The test method involves the cyclic exposure of test specimens to a mist of disinfectant and to a
ventilation condition. After the cycles, the specimens are studied to identify if there is a change in mass, or
changes to the specimen surface. This document provides details on the instruments, reagents, preparation
and pretreatment of the test specimens, test conditions, test methods, calculation of corrosion rate, reports, etc.
A feature of this document is a corrosion test method which can stimulate exposure to the real disinfection
environment for metal materials. This document is applicable to the determination of corrosion of
disinfectant aerosol spray to metal materials.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 3696, Water for analytical laboratory use — Specification and test methods
ISO 6353, — Reagents for chemical analysis
ISO 8044, Corrosion of metals and alloys — Vocabulary
ISO 8407, Corrosion of metals and alloys — Removal of corrosion products from corrosion test specimens
ISO 8486-1, Bonded abrasives — Determination and designation of grain size distribution — Part 1: Macrogrits
F4 to F220
ISO 11463, Corrosion of metals and alloys — Guidelines for the evaluation of pitting corrosion
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8044 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Apparatus
4.1 Test cabinet
The distribution of the spray within the cabinet shall be homogenous. The volume of the test cabinet should
be 1 m . If the distribution of temperature, humidity and spray are homogeneous, a test cabinet of another
volume may be used. All components of the test cabinet which are in contact with the disinfectants shall be
constructed of materials resistant to any corrosion caused by the disinfectant. The construction materials
should also not influence the corrosivity of the test disinfectant.
Features of the test cabinet shall include:
— a temperature adjustment system (user adjustment of at least 20 °C to 25 °C);
— a humidity adjustment system (relative humidity controlled at least 70 % to 80 %) ;
— a ventilation device.
An automatic control system shall also be a feature of the test cabinet. The system should control:
— temperature
— humidity
— spray time
— disinfection maintain time
— ventilation time
— cycle number
NOTE A schematic diagram of one possible design of test cabinet and associated apparatus for disinfectant
corrosion test in the spray conditions is shown in Annex B.
4.2 Spray equipment
The spray equipment shall comprise an air compressor, pressure gauges, a metering pump and a sprayer.
The sprayer should produce ejected aerosols with a diameter of 50 µm or less. In addition, the diameter of
more than 90 % aerosol particles should
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