GB/T 4909.9-2009
ActiveTest methods for bare wires - Part 9: Test for continuity of coating - Sodium polysulfide solution method
裸电线试验方法 第9部分：镀层连续性试验 多硫化钠法
Application Summary AI generated
This standard specifies a test method using a sodium polysulfide solution to detect discontinuities, such as pores or cracks, in metallic coatings on bare electrical wires. It is applied in the quality control and inspection of copper or aluminum conductors with tin, silver, or nickel coatings, commonly used in power cables and winding wires. The test is critical for ensuring the corrosion resistance and long-term reliability of electrical conductors in industrial and utility applications.
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Transparency note: The application summary and key sentences on this page were automatically generated by AI from the standard's original text. This content has not been human-verified and should not be used for compliance or regulatory purposes. Always refer to the official standard document from the issuing authority.