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GB/T 2423.33-2021Environmental testing—Part 2: Test methods—Test Kca: High concentration sulfur dioxid (English PDF)

环境试验第2部分：试验方法试验Kca：高浓度二氧化硫试验

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 21, 2021

Implementation date

December 1, 2021

Scope

GB/T 2423.33-2021 is the English-translated version of 环境试验第2部分：试验方法试验Kca：高浓度二氧化硫试验.

GB/T 2423.33-2021 is the part of the Chinese environmental testing series that gives test Kca, the alternating condensation test in an atmosphere with a high concentration of sulphur dioxide.

It sets the general conditions and the method of the test: the chamber and its control, the concentration of the gas, the cycles of condensation and drying, the mounting of the specimens, the duration and the examination and evaluation afterwards.

It applies to the testing of electrotechnical products in that corrosive atmosphere. Manufacturers and environmental test laboratories use it. It replaces GB/T 2423.33-2005, was issued on 21 May 2021 and has applied since 1 December 2021.

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Document preview — GB/T 2423.33-2021

National Standard of the People's Republic of China

ICS: 19.040
Classification: K 04
Replacing: GB/T 2423.33-2005

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword3
Introduction5
1 Scope6
2 Normative references6
3 Terms and definitions7
4 Test equipment and materials7
5 Test procedure7
6 Intermediate detection9
7 Final detection9
8 Detailed rules that shall be given in quoting this document9
Appendix A (Informative) Constituent documents of GB/T 242310
Appendix B (Normative) Corrosion effect inspection of the test chamber14

1 Scope

This document specifies the general conditions and methods for the test of samples in the alternating climate of condensed water containing high concentration sulfur dioxide, especially for the sulfur dioxide concentration that is not included in GB/T 9789-2008, so that when tests are carried out in different laboratories, comparable test results can be obtained.

This document is used to determine the suitability of products and their materials in chemically corrosive environments.

The content of this document does not include sample shape, sample preparation and analysis, and evaluation of test results. Regarding these provisions, refer to the relevant standards or negotiate in accordance with the specific situation.

This test cannot be used directly for the comparison of corrosion resistance, unless the application environment of the anti-corrosion system is similar.

Because the corrosion test conditions are very different from the actual application conditions, the corrosion process and the corrosion mechanism are different.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB/T 2421-2020, Environmental testing - General and guidance

GB/T 5213-2019, Cold rolled low carbon steel sheet and strip

GB/T 9789-2008, Metallic and other non-organic coatings - Sulfur dioxide test with general condensation of moisture

GB/T 16545-2015, Corrosion of metals and alloys - Removal of corrosion products from corrosion test specimens

3 Terms and definitions

There are no terms and definitions that need to be defined in this document.

4 Test equipment and materials

See Chapter 3 of GB/T 9789-2008.

The corrosion effect inspection of the test chamber shall be in accordance with Appendix B.

5 Test procedure

5.1 Overview

If the concentration is not specified in this test, carry out according to the test Kca1.

In the same test equipment, samples to be tested at the same time should have the same anti-corrosion system, because the interaction between samples of different anti-corrosion systems is inevitable. When testing different anti-corrosion systems at the same time, as well as when the materials are different, it should be considered that the effects of sulfur dioxide on them are often different.

5.2 Samples and pretreatment

In accordance with Chapter 4 of GB/T 9789-2008 and relevant regulations.

5.3 Initial inspection

Appearance inspection and/or electrical and mechanical performance testing shall be carried out on the samples according to the requirements of relevant specifications.

5.4 Sample exposure method

In accordance with Chapter 5 of GB/T 9789-2008 and relevant regulations.

5.5 Test conditions

The sample shall be placed in the test chamber in the unpackaged, unpowered, "ready to use" state, or in the state that is specified by the relevant specifications.

Appendix A (Informative)

Constituent documents of GB/T 2423 In addition to this document, the constituent documents of GB/T 2423 are as follows:

GB/T 2423.1-2008, Environmental testing for electric and electronic products - Part 2: Test methods - Tests A: Cold (IEC 60068-2-1: 2007, IDT)

GB/T 2423.2-2008, Environmental testing for electric and electronic products - Part 2: Test methods - Tests B: Dry heat (IEC 60068-2-2:2007, IDT)

GB/T 2423.3-2016, Environmental testing - Part 2: Testing method - Test Cab: Damp heat, steady state (IEC 60068-2-78:2012, IDT)

GB/T 2423.4-2008, Environmental testing for electric and electronic products - Part 2: Test method - Test Db: Damp heat, cyclic (12h + 12h cycle) (IEC 60068- 2-30:2005, IDT)

GB/T 2423.5-2019, Environmental testing - Part 2: Test methods - Test Ea and guidance: Shock (IEC 60068-2-27:2008, IDT)

GB/T 2423.7-2018, Environmental testing - Part 2: Test methods - Test Ec:

Rough handling shocks, primarily for equipment-type specimens (IEC 60068- 2-31:2008, IDT)

GB/T 2423.10-2019, Environmental testing - Part 2: Test methods - Test Fc: Vibration (sinusoidal) (IEC 60068-2-6:2007, IDT)

GB/T 2423.15-2008, Environmental testing for electric and electronic products - Part 2: Test methods - Test Ga and guidance: Acceleration, steady (IEC 60068-2-7:1986, IDT)

GB/T 2423.16-2008, Environmental testing - Part 2: Test methods - Test J and guidance: Mold growth (IEC 60068-2-10:2005, IDT)

GB/T 2423.17-2008, Environmental testing for electric and electronic products - Part 2: Test method - Test Ka: Salt mist (IEC 60068-2-11:1981, IDT)

GB/T 2423.18-2021, Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution) (IEC 60068-2-52:2017, IDT)

GB/T 2423.19-2013, Environmental testing - Part 2: Test methods - Test Kc: Sulphur dioxide test for contacts and connections (IEC 60068-2-42:2003, IDT)

GB/T 2423.40-2013, Environmental Testing - Part 2: Test Methods - Test Cx:

Damp Heat, Steady State (Unsaturated Pressurized Vapour) (IEC 60068-2- 66:1994, IDT)

GB/T 2423.41-2013, Environmental testing - Part 2: Test methods - Wind pressure

GB/T 2423.43-2008, Environmental testing for electric and electronic products - Part 2: Test methods - Mounting of specimens for vibration impact and similar dynamic tests (IEC 60068-2-47:2005, IDT)

GB/T 2423.45-2012, Environmental testing - Part 2: Test methods - Test Z/ABDM: Climatic sequence (IEC 60068-2-61:1991, MOD)

GB/T 2423.47-2018, Environmental testing - Part 2: Test methods - Test Fg: Acoustic vibration (IEC 60068-2-65:2013, IDT)

GB/T 2423.48-2018, Environmental testing - Part 2: Test methods - Test Ff: Vibration - Time-history and sine-beat method (IEC 60068-2-57:2013, IDT)

GB/T 2423.50-2012, Environmental testing - Part 2: Test methods - Test Cy:

Damp heat, steady state, accelerated test primarily intended for components (IEC 60068-2-67:1995, IDT)

GB/T 2423.51-2020, Environmental testing - Part 2: Test methods - Test Ke: Flowing mixed gas corrosion test (IEC 60068-2-60:2015, IDT)

GB/T 2423.52-2003, Environmental testing for electric and electronic products - Part 2: Test methods - Test 77: Body strength and impact shock (IEC 60068- 2-77:1999, IDT)

GB/T 2423.53-2005, Environmental testing for electric and electronic products - Part 2: Test methods - Test Xb: Abrasion of markings and letterings caused by rubbing of fingers and hands (IEC 60068-2-70:1995, IDT)

GB/T 2423.54-2005, Environmental testing for electric and electronic products - Part 2: Test methods - Test Xc: Fluid contamination (IEC 60068-2-74:1999, IDT)

GB/T 2423.55-2006, Environmental testing for electric and electronic products - Part 2: Test methods - Test Eh: hammer tests (IEC 60068-2-75:1997, IDT)

GB/T 2423.56-2018, Environmental testing - Part 2: Test methods - Test Fh: Vibration, broadband random and guidance (IEC 60068-2-64:2008, IDT)

GB/T 2423.57-2008, Environmental testing for electric and electronic products - Part 2: Tests - Test Ei: Shock - Shock response spectrum synthesis (IEC 60068-2-81:2003, IDT)

B.1 Overview

In order to ensure the reproducibility and repeatability of the test results that are obtained from one or several similar test equipment, performance inspections shall be carried out. The regulations in B.2 ~ B.7 are applicable to the test chamber whose volume is 300 L.

B.2 Sample

B.2.1 Select 5 samples; the size of each sample is 100 mm in length, 50 mm in width, and 0.6 mm ~ 1.5 mm in thickness; the material is a steel plate whose surface quality is grade FD and designation is DC04, as specified in GB/T 5213- 2019 B.2.2 In order to meet the requirement of the total exposed area of the tested sample (see 5.4 of GB/T 9789-2008), select two blank samples; the size of each sample is 400 mm in length, 250 mm in width, and 1 mm in thickness; the material is the same as that listed in B.2.1.

B.3 Preparation of samples

Before the performance test, use a soft cloth or brush that does not contain fibers to degrease the sample that is specified in B.2, with petroleum solvent or other suitable solvents; then, use a balance to weight the sample that is specified in B.2.1, accurate to 1 mg. If the weighing cannot be carried out immediately after the degreasing treatment, the sample shall be placed in the desiccator until it can be weighed.

B.4 Test procedure

Hang 5 samples vertically in the test chamber; hang 2 blank samples vertically on both sides of the sample in the test chamber at the same time; perform a 5- cycle alternating test in accordance with the test conditions that are specified in GB/T 9789-2008.

B.5 Corrosion effect inspection

After the test is over, use hydrochloric acid, whose density is 1.10 g/mL, that is added with 3.5 g/L hexamine with a corrosion inhibitory effect, (500 mL of chemically pure hydrochloric acid with a density of 1.19 g/mL plus deionized

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 25 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

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Editions of GB/T 2423.33

Edition	Title	Revision	Status
GB/T 2423.33-2021	Environmental testing—Part 2: Test methods—Test Kca: High concentration sulfur dioxid	current edition	Current
GB/T 2423.33-2005	Environmental testing—Part 2: Test methods—Test Kca: High concentration sulfur dioxid	previous edition	Superseded

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