GB 4909.9-1985 Test methods for bare wires - Coating continuity test - Sodium polysulfide method
Basic Information
Standard ID:
GB 4909.9-1985
Standard Name: Test methods for bare wires - Coating continuity test - Sodium polysulfide method
Chinese Name:
裸电线试验方法 镀层连续性试验 多硫化钠法
Standard category:National Standard (GB)
state:in force
Date of Release1985-01-31
Date of Implementation:1985-01-02
standard classification number
Standard ICS number:Electrical engineering>>Wires and cables>>29.060.10 Wires
Standard Classification Number:Electrical Engineering>>Electrical Materials and General Parts>>K11 Bare Wire
Publication information
publishing house:China Standards Press
Publication date:1985-01-02
other information
Release date:1985-01-31
Review date:2004-10-14
drafter:Fan Man'e
Drafting unit:Shanghai Cable Institute
Focal point unit:National Wire and Cable Standardization Technical Committee
Proposing unit:Ministry of Machinery Industry of the People's Republic of China
Publishing department:China Electrical Equipment Industry Association
competent authority:China Electrical Equipment Industry Association
Introduction to standards:
This test method is suitable for checking the continuity of metal plating (such as tin, silver, nickel, etc.) on wire and cable conductors. GB 4909.9-1985 Bare wire test method Plating continuity test Sodium polysulfide method GB4909.9-1985 Standard download decompression password: www.bzxz.net
Some standard content:
National Standard of the People's Republic of China
Test methods for bare wires
Test for continuity of coatingSodium polysulfide solution methodUDC 621.315.14
GB 4909.9--85
The provisions of this standard are consistent with the relevant provisions of ASTMB33 (1981), ASTMB298 (1980) and ASTMB355 (1980).
1 Scope of application
This test method is applicable to checking the continuity of metal coatings (such as tin, silver, nickel, etc.) of wire and cable conductors. 2 Test equipment
2.1 Glass measuring cylinder 250ml.
2.2 Reagents
2.2.1 Hydrochloric acid chemically pure.
2.2.2 Chemically pure sodium sulfide
2.2.3 Sulfur, benzene or ether.
3 Sample preparation
3.1 Sampling The sample should consist of 8 product packaging unit rings or discs. Cut a sample of about 150mm in length from each packaging unit.
3.2 PretreatmentwwW.bzxz.Net
3.2.1 Soak the sample in appropriate organic solvents such as benzene, ether or trichloroethylene for at least 3 minutes. After taking it out, dry it with a clean soft cloth.
3.2.2 Place the pretreated sample in a clean container and wait for the test. When taking and placing the sample, do not touch the part of the sample immersed in the test solution with your hands, and take care to prevent damage to the surface of the sample. 4 Test steps
4.1 Preparation of hydrochloric acid solution
4.1.1 Chemically pure (CP) hydrochloric acid is diluted with distilled water. The specific gravity of the test hydrochloric acid solution obtained at 16°C is 1.08. 4.1.2 Each portion of hydrochloric acid solution (180ml) used for tinned copper wire test should be treated as invalid after being immersed in the number of specimens specified in the table for 2 cycles.
Published by the National Bureau of Standards on January 31, 1985
Implemented on December 1, 1985
Nominal diameter of specimen dmm
0.072<0.75
0.75441.00
1.00
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