1 Scope
This document specifies the apparatus, the reagents and the procedure to be used in conducting the neutral salt spray (NSS), acetic acid salt spray (AASS) and copper-accelerated acetic acid salt spray (CASS) tests. It also describes the method employed to evaluate the corrosivity of the test cabinet environment.
It is applicable to assessment of the corrosion resistance of metallic materials and coatings, with or without permanent or temporary corrosion protection.
It does not specify the dimensions or types of test specimens, the exposure period to be used for a particular product, or the interpretation of results. Such details are provided in the appropriate product specifications.
It is useful for detecting discontinuities, such as pores and other defects, in metals and their alloys, as well as metallic, organic, anodic oxide and conversion coatings.
The neutral salt spray (NSS) test applies to:
——metals and their alloys;
——metallic coatings (anodic and cathodic);
——conversion coatings;
——anodic oxide coatings;
——organic coatings on metallic materials.
The acetic acid salt spray test is useful for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It has also been found suitable for testing anodic and organic coatings on aluminium.
The copper-accelerated acetic acid salt spray test is useful for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It has also been found suitable for testing anodic and organic coatings on aluminium.
These methods are all suitable for checking that the quality of a metallic material, with or without corrosion protection, is maintained. They are not intended to be used as a means of ranking different materials relative to each other with respect to corrosion resistance or as means of predicting long-term corrosion resistance of the tested material.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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.
GB/T 6461 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests (GB/T 6461-2002, ISO 10289:1999, IDT)
GB/T 9271 Paints and varnishes - Standard panels for testing (GB/T 9271-2008, ISO 1514:2004, MOD)
GB/T 10123 Corrosion of metals and alloys - Basic terms and definitions (GB/T 10123-2001, eqv ISO 8044-1999)
GB/T 13452.2 Paints and varnishes - Determination of film thickness (GB/T 13452.2-2008, ISO 2808:2007, IDT)
GB/T 16545 Corrosion of metals and alloys - Removal of corrosion products from corrosion test specimens (GB/T 16545-2015, ISO 8407:2009, IDT)
GB/T 30786 Paints and varnishes - Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing (GB/T 30786-2014, ISO 17872-2007, IDT)
GB/T 30789.1 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 1: General introduction and designation system (GB/T 30789.1-2015, ISO 4628-1:2003, IDT)
GB/T 30789.2 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 2: Assessment of degree of blistering (GB/T 30789.2-2014, ISO 4628-2:2003, IDT)
GB/T 30789.3 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 3: Assessment of degree of rusting (GB/T 30789.3-2014, ISO 4628-3:2003, IDT)
GB/T 30789.4 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 4: Assessment of degree of cracking (GB/T 30789.4-2015, ISO 4628-4:2003, IDT)
GB/T 30789.5
Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 5: Assessment of degree of flaking (GB/T 30789.5-2015, ISO 4628-5:2003, IDT)
GB/T 30789.8 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect (GB/T 30789.8-2015, ISO 4628-8:2003, IDT)
ISO 3574 Cold-reduced carbon steel sheet of commercial and drawing qualities
ISO 4623-2:2016 Paints and varnishes - Determination of resistance to filiform corrosion - Part 2: Aluminium substrates
ISO 8993 Anodizing of aluminium and its alloys - Rating system for the evaluation of pitting corrosion - Chart method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 10123 and the following apply.
3.1
reference material
material with known test performance
3.2
reference specimen
portion of the reference material (3.1) that is to be exposed with the intention to check the reproducibility and repeatability of the test results for the test cabinet in use
3.3
test specimen
specific portion of the samples upon which the testing is to be performed
3.4
substitute specimen
specimen made of inert materials (such as plastic or glass) used for the substitute of a test specimen (3.3)
Foreword I
Introduction IV
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Test solutions
6 Apparatus
7 Method for evaluating cabinet corrosivity
8 Test specimens
9 Arrangement of the test specimens
10 Test conditions
11 Period of tests
12 Treatment of test specimens after test
13 Evaluation of results
14 Test report
Annex A (Informative) Comparison between this document and ISO 9227:2017 in clause/subclause number
Annex B (Informative) Technical differences between this document and ISO 9227:2017 and their causes
Annex C (Informative) Schematic diagram of one possible design of spray cabinet with means for optional testing for exhaust and drain
Annex D (Informative) Complementary method for evaluating cabinet corrosivity using zinc reference specimens
Annex E (Nominative) Preparation of specimens with organic coatings for testing
Annex F (Nominative) Required supplementary information for testing test specimens with organic coatings
Annex G (Informative) Supplementary information for the grades of steel reference specimens
Bibliography
1 Scope
This document specifies the apparatus, the reagents and the procedure to be used in conducting the neutral salt spray (NSS), acetic acid salt spray (AASS) and copper-accelerated acetic acid salt spray (CASS) tests. It also describes the method employed to evaluate the corrosivity of the test cabinet environment.
It is applicable to assessment of the corrosion resistance of metallic materials and coatings, with or without permanent or temporary corrosion protection.
It does not specify the dimensions or types of test specimens, the exposure period to be used for a particular product, or the interpretation of results. Such details are provided in the appropriate product specifications.
It is useful for detecting discontinuities, such as pores and other defects, in metals and their alloys, as well as metallic, organic, anodic oxide and conversion coatings.
The neutral salt spray (NSS) test applies to:
——metals and their alloys;
——metallic coatings (anodic and cathodic);
——conversion coatings;
——anodic oxide coatings;
——organic coatings on metallic materials.
The acetic acid salt spray test is useful for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It has also been found suitable for testing anodic and organic coatings on aluminium.
The copper-accelerated acetic acid salt spray test is useful for testing decorative coatings of copper + nickel + chromium, or nickel + chromium. It has also been found suitable for testing anodic and organic coatings on aluminium.
These methods are all suitable for checking that the quality of a metallic material, with or without corrosion protection, is maintained. They are not intended to be used as a means of ranking different materials relative to each other with respect to corrosion resistance or as means of predicting long-term corrosion resistance of the tested material.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions 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.
GB/T 6461 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests (GB/T 6461-2002, ISO 10289:1999, IDT)
GB/T 9271 Paints and varnishes - Standard panels for testing (GB/T 9271-2008, ISO 1514:2004, MOD)
GB/T 10123 Corrosion of metals and alloys - Basic terms and definitions (GB/T 10123-2001, eqv ISO 8044-1999)
GB/T 13452.2 Paints and varnishes - Determination of film thickness (GB/T 13452.2-2008, ISO 2808:2007, IDT)
GB/T 16545 Corrosion of metals and alloys - Removal of corrosion products from corrosion test specimens (GB/T 16545-2015, ISO 8407:2009, IDT)
GB/T 30786 Paints and varnishes - Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing (GB/T 30786-2014, ISO 17872-2007, IDT)
GB/T 30789.1 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 1: General introduction and designation system (GB/T 30789.1-2015, ISO 4628-1:2003, IDT)
GB/T 30789.2 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 2: Assessment of degree of blistering (GB/T 30789.2-2014, ISO 4628-2:2003, IDT)
GB/T 30789.3 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 3: Assessment of degree of rusting (GB/T 30789.3-2014, ISO 4628-3:2003, IDT)
GB/T 30789.4 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 4: Assessment of degree of cracking (GB/T 30789.4-2015, ISO 4628-4:2003, IDT)
GB/T 30789.5
Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 5: Assessment of degree of flaking (GB/T 30789.5-2015, ISO 4628-5:2003, IDT)
GB/T 30789.8 Paints and varnishes - Evaluation of degradation of coatings - Designation of quantity and size of defects, and of intensity of uniform changes in appearance - Part 8: Assessment of degree of delamination and corrosion around a scribe or other artificial defect (GB/T 30789.8-2015, ISO 4628-8:2003, IDT)
ISO 3574 Cold-reduced carbon steel sheet of commercial and drawing qualities
ISO 4623-2:2016 Paints and varnishes - Determination of resistance to filiform corrosion - Part 2: Aluminium substrates
ISO 8993 Anodizing of aluminium and its alloys - Rating system for the evaluation of pitting corrosion - Chart method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 10123 and the following apply.
3.1
reference material
material with known test performance
3.2
reference specimen
portion of the reference material (3.1) that is to be exposed with the intention to check the reproducibility and repeatability of the test results for the test cabinet in use
3.3
test specimen
specific portion of the samples upon which the testing is to be performed
3.4
substitute specimen
specimen made of inert materials (such as plastic or glass) used for the substitute of a test specimen (3.3)
Contents of GB/T 10125-2021
Foreword I
Introduction IV
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Test solutions
6 Apparatus
7 Method for evaluating cabinet corrosivity
8 Test specimens
9 Arrangement of the test specimens
10 Test conditions
11 Period of tests
12 Treatment of test specimens after test
13 Evaluation of results
14 Test report
Annex A (Informative) Comparison between this document and ISO 9227:2017 in clause/subclause number
Annex B (Informative) Technical differences between this document and ISO 9227:2017 and their causes
Annex C (Informative) Schematic diagram of one possible design of spray cabinet with means for optional testing for exhaust and drain
Annex D (Informative) Complementary method for evaluating cabinet corrosivity using zinc reference specimens
Annex E (Nominative) Preparation of specimens with organic coatings for testing
Annex F (Nominative) Required supplementary information for testing test specimens with organic coatings
Annex G (Informative) Supplementary information for the grades of steel reference specimens
Bibliography
