Preparation of a potassium stearate boundary lubrication film and its application in vacuum electric contact moving parts
A potassium stearate, boundary lubrication technology, applied in the directions of lubricating compositions, devices for coating liquids on surfaces, coatings, etc., can solve the problem that the service life of the new spacecraft mechanism cannot be increased several times, and the lubrication performance is limited. , insufficient wear life and other problems, to achieve the effect of vacuum current-carrying tribological performance improvement, friction coefficient improvement, and easy cost.
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Embodiment 1
[0016] (1) Preparation of dip coating agent: commercialized potassium stearate powder (molecular formula C 18 h 35 KO 2 , K 2 The O content is 14.5-15.0%) dissolved in analytically pure absolute ethanol at a ratio of 3g / L, and refluxed at 78°C until it dissolves into a uniform transparent liquid;
[0017] (2) Preparation of dip-coating film layer: heat the dip-coating agent prepared above to boiling, and immerse the copper test piece plated with gold electroplating coating and the simple copper, aluminum, 9Cr18 steel test piece into the heated dip-coating agent. In the liquid, keep the solution slightly boiling during the whole process; after 10 minutes, quickly remove the pretreatment parts, and then gently wipe with a clean silk cloth to make the dip coating more uniform. After 3 repeated dipping and wiping, the film layer was uniform and continuous, and a boundary film sample was obtained. The thickness was measured to be 10 nm using an ellipsometer. The performance in...
Embodiment 2
[0020] (1) Preparation of dip coating agent: commercialized potassium stearate powder (molecular formula C 18 h 35 KO 2 , K 2 The O content is 14.5-15.0%) dissolved in analytically pure absolute ethanol at a ratio of 1 g / L, and refluxed at 78°C until it dissolves into a uniform transparent liquid;
[0021] (2) Preparation of dip-coating film layer: heat the dip-coating agent prepared above to boiling, and immerse the copper test piece plated with gold electroplating coating and the simple copper, aluminum, 9Cr18 steel test piece into the heated dip-coating agent. In the solution, keep the solution slightly boiling during the whole process, quickly lift the pretreatment parts out after 50 minutes, and then gently wipe with a clean silk cloth to make the dip coating more uniform. After 5 times of repeated dipping and wiping, the film layer was uniform and continuous, and a boundary composite film sample was obtained. The thickness of the sample film was tested by an ellipsom...
Embodiment 3
[0024] (1) Preparation of dip coating agent: commercialized potassium stearate powder (molecular formula C 18 h 35 KO 2 , K 2 The O content is 14.5-15.0%) dissolved in analytically pure absolute ethanol at a ratio of 9 g / L, and refluxed at 78°C until it dissolves into a uniform transparent liquid;
[0025] (2) Preparation of dip-coating film layer: heat the dip-coating agent prepared above to boiling, and immerse the copper test piece plated with gold electroplating coating and the simple copper, aluminum, 9Cr18 steel test piece into the heated dip-coating agent. In the whole process, keep the solution slightly boiling. After 5 minutes, the pretreatment parts are quickly lifted out, and then gently wiped with a clean silk cloth to make the dipping coating more uniform. After 3 times of repeated dipping and wiping, the film layer is uniform and continuous , to obtain boundary composite thin film samples. Using an ellipsometer to measure the thickness is 80nm. The performan...
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