GB/T 3512-2014 in English

《GB/T 3512-2014硫化橡胶或热塑性橡胶 热空气加速老化和耐热试验》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC2（全国橡胶与橡胶制品标准化技术委员会通用试验方法分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了硫化橡胶或热塑性橡胶热空气加速老化和耐热试验方法。两种方法分别为:
方法 A:空气流速低的多单元式或柜式热空气老化箱,每小时换气3次~10次;
方法 B:使用风扇强制通风的柜式热空气老化箱,每小时换气3次~10次。

1 Scope

This standard specifies accelerated ageing or heat resistance tests on vulcanized or thermoplastic rubbers. Two methods are given:
Method A: air-oven method using a cell-type oven or cabinet oven with low air speed and a ventilation of 3 to 10 changes per hour;
Method B: air-oven method using a cabinet oven with forced air circulation by means of a fan and a ventilation of 3 to 10 changes per hour.

2 Normative References

The following documents for the application of this document are essential. For dated reference, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
GB/T 25269-2010 Rubber - Guide to the Calibration of Test Equipment (ISO 18899:2004, IDT)
ISO 37 Rubber, Vulcanized or Thermoplastic - Determination of Tensile Stress-Strain Properties
ISO 48 Rubber, Vulcanized or Thermoplastic - Determination of Hardness (Hardness between 10 IRHD and 100 IRHD)
ISO 23529 Rubber - General Procedures for Preparing and Conditioning Test Pieces for Physical Test Methods

3 Principle

3.1 General

Foreword I
Introduction II
1 Scope
2 Normative References
3 Principle
4 Apparatus
5 Calibration
6 Test Pieces
7 Time Interval Between Vulcanization and Testing
8 Ageing Conditions (Duration and Temperature)
9 Procedure
10 Expression of Results
11 Precision
12 Test Report
Appendix A (Informative) Determination of the Air Speed in Ovens with Forced Air Circulation
Appendix B (Informative) Precision
Appendix C (Informative) Guidance for Using Precision Results
Appendix D (Normative) Calibration Schedule
Bibliography