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GB/T 40340-2021Composites and metal assemblies - Galvanic corrosion tests of carbon fibre reinforced plastics (CFRPs) related bonded or fastened structures in artificial atmospheres - Salt spray tests (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

August 20, 2021

Implementation date

March 1, 2022

Scope

GB/T 40340-2021 (Composites and metal assemblies - Galvanic corrosion tests of carbon fibre reinforced plastics (CFRPs) related bonded or fastened structures in artificial atmospheres - Salt spray tests) is available as an English-translated PDF.

GB/T 40340-2021 is the Chinese standard "Composites and metal assemblies - Galvanic corrosion tests of carbon fibre reinforced plastics (CFRPs) related bonded or fastened structures in artificial atmospheres - Salt spray tests".

Its scope clause reads: This document specifies the equipment and test equipment used for neutral salt spray (NSS), acetic acid salt spray (AASS) and copper accelerated acetic acid salt spray (CASS) tests.

Agents and methods used to evaluate carbon fiber-reinforced polymer matrix composites (CFRPs) in the presence of temporary or temporary insulation currents Galvanic corrosion resistance at joints and glued structures between metal materials. Its clauses include terms and definitions.

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Document preview — GB/T 40340-2021

National Standard of the People's Republic of China

Classification: Q 23

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Test solution
4.1 Preparation of salt solution
4.2 pH adjustment
4.2.1 The pH value of the salt solution
4.2.2 Neutral Salt Spray Test (NSS)
4.2.3 Acetic acid salt spray test (AASS)
4.2.4 Copper accelerated acetic acid salt spray test (CASS)
4.3 Filter
5 Device
5.1 Component protection
5.2 Salt spray box
5.3 Temperature control heater
5.4 Spray device
5.5 Collector
6 Evaluation method of corrosion performance of salt spray tank
6.1 General
6.2 Reference sample
6.3 Placement of reference sample
6.4 Test time
6.5 Mass loss (mass per unit area)
6.6 The ideal performance of the salt spray chamber
7 Test sample
8 Placement of test samples
9 Test conditions
10 Test time
11 Post-processing of test samples
11.1 General
11.2 Non-organic coating samples. metal and/or inorganic coating samples
11.3 Organic coating sample
11.3.1 Organic coating scratch sample
11.3.2 Organic coating non-scratch sample
12 Evaluation of results
13 Test report
Appendix C (Normative) Preparation of Organic Coating Test Board
Appendix D (Normative) Information to be added to organic coating test panels
Appendix E (informative) Recommended CFRP and metal assembly samples for salt spray test

1 Scope

This document specifies the equipment and test equipment used for neutral salt spray (NSS), acetic acid salt spray (AASS) and copper accelerated acetic acid salt spray (CASS) tests.

Agents and methods used to evaluate carbon fiber-reinforced polymer matrix composites (CFRPs) in the presence of temporary or temporary insulation currents

Galvanic corrosion resistance at joints and glued structures between metal materials.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

ISO 1514 Paints and varnishes-Standard panels for testing

ISO 2808 Paints and varnishes-Determination of filmthick- ness)

ISO 3574 Commercial grade and stamping grade cold-rolled carbon steel sheet (Cold-reduced carbonsteel sheet of commercial and drawingqualities)

ISO 6361-2 Wrought aluminum and aluminum alloy sheet, strip and plate Part 2.Mechanical properties (Wroughtaluminiumand aluminiumaloys-Sheets, stripsandplates-Part 2.Mechanicalproperties)

ISO 8044 Corrosion of metals and alloys basic terms and definitions (Corrosionofmetalsandaloys-Basicterms anddefinitions)

ISO 8407 Corrosion of metals and alloys. Removal of corrosion products on corrosion samples (Corrosionofmetalsandaloys-Re- movalofcorrosionproductsfromcorrosiontestspecimens)

ISO 17872 Paints and varnishes corrosion test of metal plate coating scratch marking guidelines (Paints and varnishes-

Guidelinesfortheintroductionofscribemarksthroughcoatingsonmetalicpanelsforcorrosiontes- ting)

3 Terms and definitions

The following terms and definitions defined in ISO 8044 apply to this document.

3.1 Reference material

Materials with known test performance.

3.2 Reference specimen

A certain amount of reference material used to check the reproducibility and repeatability of the salt spray chamber test results.

GB/T 42542 | GB/T 41061 | GB/T 40388 | GB/T 47083 | GB/T 43938.3 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 37 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 1514 · ISO 2808 · ISO 3574 · ISO 6361 · ISO 8044 · ISO 8407 · ISO 17872

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