GB/T 32088-2015Accelerated weathering test methods of automotive nonmetal components and materials using a xenon-arc apparatus (English PDF)

1 Scope

This Standard specifies the accelerated weathering test methods and evaluation methods of automotive nonmetal components and materials using irradiance-controlled xenon-arc apparatus..

This Standard is applicable to the automotive nonmetal components and materials, such as plastics, rubber, textiles, leather, adhesives, coatings and etc..

2 Normative References

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this document.

GB/T 1766-2008 Paints and Varnishes - Rating Schemes of Degradation of Coats

GB/T 2918-1998 Plastics - Standard Atmospheres for Conditioning and Testing

GB/T 6682-2008 Water for Analytical Laboratory Use - Specification and Test Methods

3 Terms and Definitions

The following terms and definitions are applicable to this document.

4 Test Equipment

4.1 Test equipment takes xenon lamp as radiation source. Test specimen is installed within the test chamber; it shall ensure the consistence of test condition of test specimen.

4.2 Equipment's manufacturer is responsible for the equipment approval, providing test equipment's key parameter indicators, including the spectral power distribution (SPD) etc.

4.3 Unless otherwise agreed by both parties of the test, the test equipment shall be installed with black panel thermometer or black standard thermometer.

4.4 Test equipment shall ensure, at any location in the test specimen exposure area, the irradiance is 70% maximum irradiance in this region at least.

5 Test Specimen

5.1 The dimension of test specimen shall be coordinated to confirm by both parties of the test.

5.2 Before the test, test specimen shall be cleaned; the detergent that may erode the specimen surface shall not be used. Never wash away the protective film that is intentionally coated on the sample surface.

5.4 The quantity of specimen shall be at least two blocks; one block is for file specimen, which is used for evaluation and comparison; and stored in the dark and dry environment. Unless otherwise agreed by both parties of the test, the file specimen generally shall not be shielded by half.

5.5 In order to provide aging record with different time interval, sufficient specimens shall be provided.

5.6 The soft specimen shall be fixed on the back of inert metal plate.

6 Test Conditions & Methods

6.1 In accordance with Appendix A, maintain and calibrate the test equipment.

When testing the automotive interior parts, it shall be according to Appendix B and C; use reference materials;

6.2 The water used for spraying, humidifying or other uses shall not leave any deposits or smudges on the test specimen; solid particle content in water shall not exceed one millionth; silicon dioxide content shall not exceed two ten-millionths; the determination of silicon dioxide shall refer to GB/T 6682-2008.

6.3 When testing the automotive interior parts, firstly turn off all sprinkling devices on the equipment, so as to prevent the accidental spraying to the test specimen.

6.6 When testing the automotive interior parts, according to the actual situation, both parties of test shall negotiate to select certain test method for testing from Table 1. Generally, test method A-1 is recommended to use.

6.7 When testing the automotive exterior parts, according to the actual situation, both parties of test shall negotiate to select certain test method for testing from Table 2. Generally, test method B-1 is recommended to use.

7 Test Steps

7.1 The dimension of test specimen shall conform to the requirement of specimen holder; while the installation of irregular test specimen shall be negotiated by both parties of the test.

7.2 It shall machine the test specimen till it can be installed within the test equipment used test holder; adjust the state of test specimen as per the requirements given in GB/T 2918-1998.

7.6 Different test specimens that have mutual effects towards the test results shall not be installed within the same test chamber to test at the same time.

7.7 Select test method; set each test required radiant or time. It is suggested, during the test period, to apply the reference materials to compare at the same time.

7.8 During the test period, regularly change the test specimen's position, so that further improve the consistence of the test. If it is specially required, both parties of the test shall agree on the changing mode of test specimen.

8 Result and Evaluation

9 Test Report

Test report shall include the following contents. […]

Appendix A (Normative) Maintenance, Replacement and Calibration of Test Equipment