Antirust, wear-resistant, and environment-friendly sealing grease and preparation method thereof

A sealing grease, an environmentally friendly technology, applied in chemical instruments and methods, other chemical processes, petroleum industry, etc., to achieve good wear resistance, improve dispersion, and reduce health damage

Inactive Publication Date: 2017-09-05
江苏海川卓越密封材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides anti-rust and wear-resistant environment-friendly sealing grease and its preparation method to solve the problem of ensuring that the sealing grease does not contain heavy metals such as zinc, and can also ensure that the casing thread is not rusted when placed in the open air for a long time , and the problem of maintaining lubricity and anti-sticking properties under high temperature conditions

Method used

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  • Antirust, wear-resistant, and environment-friendly sealing grease and preparation method thereof
  • Antirust, wear-resistant, and environment-friendly sealing grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the preparation proportion of each raw material in the environment-friendly sealing grease of anti-rust and wear-resisting

[0021] The raw materials in the anti-rust and wear-resistant environment-friendly sealing grease were mixed according to the mass parts mentioned in Table 1 to obtain three groups of anti-rust and wear-resistant environment-friendly sealing grease I~III with different mixing ratios.

[0022] Anti-rust and wear-resistant environment-friendly sealing grease of different mixing ratios (mass parts) of table 1

[0023]

Embodiment 2

[0024] Embodiment 2: the preparation method of the environment-friendly sealing grease of anti-rust and wear-resisting

[0025] Step 1, the preparation of composite calcium phosphate: calcium carbonate is dissolved in water respectively to obtain solution A, phosphoric acid is dissolved in water to obtain solution B, the Ca / P molar ratio of described calcium carbonate and phosphoric acid is 1:0.5, and solution A is stirred Add it dropwise to solution B to obtain a mixed solution; use a regulator to keep the pH value of the mixed solution at 10-10.5, stir and react at room temperature for 8-10 hours, add a dispersant, age for 24 hours, wash the precipitate repeatedly with distilled water, Dry at 120°C for 2-12 hours; then raise the temperature to 600°C-1200°C at a heating rate of 5°C / min, and keep it warm for 0.5h-2h to obtain composite calcium phosphate.

[0026] Preparation of environmentally friendly expanded graphite: add nitric acid solution and potassium permanganate with...

Embodiment 3

[0029] Embodiment 3: the preparation method of the environment-friendly sealing grease of anti-rust and wear-resisting

[0030] Step 1, preparation of composite calcium phosphate: Calcium nitrate is dissolved in water respectively to obtain solution A, polyphosphoric acid is dissolved in water to obtain solution B, the Ca / P molar ratio of described calcium nitrate and polyphosphoric acid is 1:2, solution A Add it dropwise to solution B while stirring to obtain a mixed solution; use a regulator to keep the pH value of the mixed solution at 10-10.5, stir and react at room temperature for 8-10 hours, add a dispersant, age for 24 hours, and repeat the precipitation with distilled water Wash and dry at 120°C for 2-12 hours; then raise the temperature to 600°C-1200°C at a heating rate of 5°C / min, and keep it warm for 0.5h-2h to obtain complex calcium phosphate.

[0031] Preparation of environmentally friendly expanded graphite: add nitric acid solution and potassium dichromate with ...

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Abstract

The invention discloses an antirust, wear-resistant, and environment-friendly sealing grease, which is composed of lithium-based lubricating grease, a tackifier, a corrosion inhibitor, composite calcium phosphate, environment-friendly expanded graphite, and polytetrafluoroethylene. Compared with the prior art, the provided sealing grease contains a corrosion inhibitor and composite calcium phosphate and thus has multiple antirust functions; composite calcium phosphate is slightly dissolved in water under an corrosive environment, has a strong chelating performance on metals, can form a passive coating on the iron surface, has an excellent antirust effect, and is green and environment-friendly; the expanded graphite does not contain sulfur or is low in sulfur, and has a high expanding rate and excellent anticorrosion performance and anti-wear property; different from conventional sealing grease, provided sealing grease has a better anti-rubbing performance and anticorrosion performance; moreover, zinc powder is not needed, the performance of thread grease is not influenced at the same time, the heavy metal pollution to the environment is reduced, the damage to the users is reduced, and the provided sealing grease is environment-friendly.

Description

technical field [0001] The invention relates to the field of lubricating and sealing materials, in particular to an antirust and wear-resistant environment-friendly sealing grease and a preparation method thereof. Background technique [0002] Petroleum sealing grease is an important material used for lubricating and sealing special pipe strings in the process of oil exploitation. Due to the harsh environment (such as extremely cold, extremely hot, wet or dry, dirty, and highly corrosive environments), it will cause buckling, Problems such as shackle sticking oil circuit, difficulty in manual coating, thread corrosion, environmental pollution, etc. The research and development technology of foreign thread sealants is superior to domestic ones, and has uniform standards in terms of sealing performance, friction and tightening degree. Foreign thread sealants occupy most of the market share in our country. [0003] Defects of the prior art: the commonly used thread sealant is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C09K3/10C10N30/06C10N30/12C10N50/10
CPCC09K3/10C10M169/06C10M2215/04C10M2215/044C10M2207/283C10M2207/289C10M2223/06C10M2219/042C10M2201/041C10M2207/021C10M2205/026C10M2201/085C10M2201/082C10M2201/062C10N2030/12C10N2030/06C10N2040/34C10N2050/10
Inventor 吴德斌
Owner 江苏海川卓越密封材料有限公司
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