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Molybdenum disulfide and nickel phosphorus composite deposition liquid and its electrodeposition method

A technology of molybdenum disulfide and deposition solution, which is applied in the field of molybdenum disulfide and nickel-phosphorus composite deposition solution and its electrodeposition, to achieve the effects of reduced shear force, excellent anti-friction performance, and low shear force

Inactive Publication Date: 2005-04-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite deposition of molybdenum disulfide and nickel-phosphorus composite film technology has been applied to micro-mechanical friction surfaces, and there have been no public reports at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A molybdenum disulfide and nickel-phosphorus composite deposition solution for surface treatment of mechanical parts, including soluble tetrathiomolybdate, soluble nickel salt, soluble oxysalt of phosphorus and water, soluble oxyacid of phosphorus Salt can be sodium pyrophosphate, and simultaneously, sodium pyrophosphate has also played the effect of chromate, and the mol ratio of above-mentioned soluble tetrathiomolybdate and soluble nickel salt is 0.01~0.5: 1, and present embodiment can select: 0.03: 1, 0.1: 1, 0.21: 1, and 0.3: 1; the molar ratio of sodium pyrophosphate to soluble nickel salt is 0.01 to 10: 1, and this embodiment can be selected: 0.2: 1, 0.5: 1, 4: 1 and 7: 1; present embodiment also can comprise additive, and this additive comprises at least one kind of organic acid or salt, and this additive and soluble nickel salt molar ratio are 1~6: 1, and its effect is to keep the effect of solution stability, improves deposition rate And the effect of depositi...

Embodiment 2

[0021] A molybdenum disulfide and nickel-phosphorus composite deposition solution for surface treatment of mechanical parts, composed of soluble tetrathiomolybdate, soluble nickel salt, sodium pyrophosphate and additives, the molar percentage of its active ingredients (excluding water) It is 1%~20% of soluble tetrathiomolybdate, and 2%, 7%, 11%, 16% and 19% can be selected in this embodiment; 25%~50% of soluble nickel salt, can be selected in this embodiment: 27 %, 29%, 33%, 40% and 47%; sodium hypophosphite 25% ~ 60%, the present embodiment can choose 28%, 31%, 35%, 36% and 55%; sodium pyrophosphate 25% ~ 60% %, optional in this embodiment: 26%, 31%, 34%, 37% and 55%; disodium edetate 1% to 20%, optional in this embodiment: 3%, 9%, 14% , 17% and 19%; trisodium citrate 1~30%, the present embodiment can select: 3%, 7%, 17%, 25%, 28%. The molar percentage of water in the electrodeposition solution is 99% to 30%, which can be selected in this embodiment: 35%, 45%, 52%, 60%, 71% ...

Embodiment 3

[0023] A kind of electrodeposition method that utilizes above-mentioned composite deposition liquid to carry out surface treatment to mechanical parts is: firstly carry out cleaning treatment to the surface to be treated of mechanical parts, and this cleaning treatment includes degreasing, degreasing, ash removal and insulating layer removal etc., and then Place the surface of the mechanical parts to be treated in the electrolytic tank storing the above-mentioned composite deposition solution, and connect the mechanical parts to be treated with the cathode of the power supply. The current density is 1-120 minutes when the power is turned on, and the electrochemical reaction occurs. For example, the time of electrodeposition when the power is turned on can be: 1, 120, 111, 74, 32, 56 or 15 minutes to make molybdenum disulfide Electrodeposit the nickel-phosphorus composite film on the surface of the mechanical parts to be treated. Finally, take out the mechanical parts to be proc...

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Abstract

The present invention discloses one kind of composite MoS2 and Ni-P depositing liquid for treating the friction surface of micro machine. The composite MoS2 and Ni-P depositing liquid includes soluble tetrathiomolyadate, soluble Ni salt, soluble oxasalt of P and water. The molar ratio between soluble tetrathiomolyadate and soluble Ni salt is 0.01-0.5, that between soluble oxasalt of P and soluble Ni salt is 0.01-30, and that between soluble Ni salt and water is 1-100 to 5000. The electric deposition process of utilizing the composite depositing liquid to treat surface of machine part is also disclosed and includes the steps of surface cleaning treatment of the machine part, setting the surface in the depositing liquid inside electrolytic bath, connecting the part with cathode of the power source, applying current in 0.1-100 mA / sq cm for 1-120 min, cleaning the part, drying and maintaining the temperature in protecting atmosphere.

Description

technical field [0001] The invention relates to a surface treatment solution for mechanical parts and a treatment method thereof, in particular to a molybdenum disulfide and nickel-phosphorus composite deposition solution and an electrodeposition method for treating micromechanical friction surfaces. Background technique [0002] Molybdenum disulfide has a layered structure, and the layers are combined by van der Waals force. Molecules can easily slide along these planes, and the shear force is small. Due to the existence of lattice defects in the actual crystal, the shear force is further reduced and has excellent anti-friction performance, so it has been widely used in the field of friction. [0003] The nickel-phosphorus coating can improve the wear resistance of the friction surface due to its high hardness after heat treatment, and can be used to strengthen the friction surface. [0004] In general, molybdenum disulfide and nickel-phosphorus ...

Claims

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Application Information

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IPC IPC(8): C25D9/08
Inventor 张旭海蒋建清于金
Owner SOUTHEAST UNIV
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