| 摘要 |
A colloidal suspension has a metal core surrounded by a surfactant. The colloidal suspension is about 0.5 micron to about 3-4 microns in diameter. The colloidal suspension acts as a lubricant and protects surfaces in rolling and/or sliding contact. When mixed with a lubricant, the colloidal suspension increases the operating life of the lubricated item. The colloidal suspension preferably is tin or bismuth nano-phase particles encased in a surfactant, preferably oleyl sarcosinate, N-coco sarcosinate, sodium sulfonate, petroleum sulfonate, or octadecenyl amine.
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