OS124 and OS138 connector contact lubricant ( Polyphenyl Ethers)

Polyphenyl Ethers were originally developed for military jet engines due to their thermal and oxidative stability and resistance to radiation environment. The first commercial application of PPE was in 1964. Using 1% solution of OS124, the wear failure of gold plated contact virtually drop to zero. Since then, connector manufacturers have used them in various plated materials and applications. Many studies have been conducted, and these are some of the advantages in using PPE lubricant. 1. Outstanding thermal and oxidation stability 2. Good resistance to chemicals and radiation. 3. Good lubricity 4. Corrosion inhibition 5. Good wear resistance 6. High surface tension ( does not migrate) 7. Low vapour pressure 8. Disperse dust and prevents contact problem 9. Possible to reduce gold plating thickness for the same life-span of connectors. 10. Resistance to **fretting corrosion 11. Extend times to failure of a connector by 2~100 times. 12. Able to restore contact failure due to fretting corrosion. These lubricants ( usually diluted) can be applied at the end of plating line, before or after soldering or on the electronic assembly even the breakdown or failure has occurred. This will serve to retard further corrosion and provide increased life for the connector and electronic or electrical component. The application is simply by spray ( normal spray bottle or aerosol can) or dipping. **Fretting corrosion: This corrosion is the result of a small scale movement ( micromotion) of a few tens to a few hundreds of micron in mated connectors, which can be caused by ie minute temperature changes, vibrations, assembly, shock impact, transportation etc etc This causes the degration of noble metal like gold, palladium and oxidation in Tin/lead alloy metal, and impede the movement of electrical current which leads to loss of transmission of data, loss of connection, heat build up, higher energy consumption , etc etc, problem prevalent in both new and old handphones, computers, electronic devices Prevention of fretting corrosion can be by done by a) high contact force b) using PPE as a contact lubricant to prevent oxidation.

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