QC/T 472-1999Automotive brake linings - Resistance to water, saline solution, oil and brake fluid - Test method (English PDF)
汽车制动器衬片 耐水、盐水、油和制动液性能 试验方法
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
March 15, 1999
Implementation date
March 15, 1999
Scope
QC/T 472-1999 is the English-translated version of 汽车制动器衬片 耐水、盐水、油和制动液性能 试验方法.
QC/T 472-1999 is the Chinese standard "Automotive brake linings - Resistance to water, saline solution, oil and brake fluid - Test method".
Its scope clause reads: This standard specifies the test equipment, test sample preparation, test procedure and data processing method adopted for the measurement of the brake lining resistance to water, saline solution, oil and brake fluid performance of motor vehicles.
This standard is applicable to the drum brake lining and the disc brake gasket for motor vehicles. Its clauses include subject content and application scope; terms; immersion liquids.
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Document preview — QC/T 472-1999
National Standard of the People's Republic of China
- Replacing
- JB 3937-1985
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- 1 Subject Content and Application Scope
- 2 Normative References
- 3 Terms
- 4 Immersion Liquids
- 5 Instruments and Equipments
- 6 Test Sample Preparation
- 7 Test Procedure
- 8 Calculation
- 9 Test Result
- Appendix A Test Record Table (Additional)
- 3.1 Immersion resistance performance
1 Subject Content and Application Scope
This standard specifies the test equipment, test sample preparation, test procedure and data processing method adopted for the measurement of the brake lining resistance to water, saline solution, oil and brake fluid performance of motor vehicles.
This standard is applicable to the drum brake lining and the disc brake gasket for motor vehicles.
2 Normative References
GB/T 1266 Chemical Reagent -- Sodium Chloride
GB/T 1690 Rubber Vulcanized or Thermoplastic -- Determination of the Effect of Liquids
QC/T 473 Motor Vehicles--Brake Linings--Internal Shear Strength of Lining material--Test Procedure
3 Terms
3.1 Immersion resistance performance
Lining materialThe capacity of resisting the changes in thickness and shear strength aspects because of immersion. Thereinto, the immersion resistance performance in the thickness aspect is expressed by the average thickness difference of the test sample before and after immersion; the immersion resistance performance in the shear strength aspect is expressed by the percentage of the corresponding value on the immersed and non-immersed test samples.
4 Immersion Liquids
a. water;
b. Saline solution: weigh 100g chemical pure sodium chloride that meets the requirements of GB 1266 and dissolve it in 500mL water, then dilute it with water to 1L and shake it up;
c. Oil: the oil shall meet the requirements of No. 2 Oil as specified in GB 1690;
d. Brake fluid: No.719 synthetic brake fluid.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of QC/T 472
| Edition | Title | Revision | Status |
|---|---|---|---|
| QC/T 472-1999 | Automotive brake linings - Resistance to water, saline solution, oil and brake fluid - Test method | current edition | Current |
| JB 3937-1985 | Automotive brake linings - Resistance to water, saline solution, oil and brake fluid - Test method | previous edition | Superseded |
This page sells the current edition, QC/T 472-1999. Earlier editions are listed for reference only.
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Related Standards
GB/T 1266-1986 — Chemical reagents--Sodium chloride
GB/T 1266-2006 — Chemical reagents -- Sodium chloride
GB/T 1690-1992 — Rubber, vulcanized-Determination of the effect of liquids
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