RU2276684C1 - Metal-plating additive to the lubricating composition - Google Patents

Abstract

FIELD: oil processing industry;; mechanical engineering; production of metal-plating additive for the lubricating composition.

SUBSTANCE: the invention is pertaining to the field of oil processing industry and mechanical engineering, in particular, to production of the metal-plating additive, which may be used in the lubricating composition applied at lubrication of the friction units of machines and gears. Substance: the additive contains (in mass %): copper oleate - 10-15, iron oleate - 5-10, nickel oleate - 3-5, glycerin - 5-10, rapic acid - the rest. The technical result of the invention is reduction of intensity of the wear and tear of the metallic surfaces in 2-4 times, the friction coefficient and temperatures in the friction zone.

EFFECT: the invention ensures reduction of intensity of the wear and tear of the metallic surfaces in 2-4 times, reduction of the friction coefficient and temperatures in the friction zone.

2 ex

Description

The invention relates to the composition of metal-cladding additives for lubricating compositions.

There are many metal-clad additives for lubricating compositions that realize the effect of selective transfer during friction. They contain a mixture of fatty acids, salts or powders of ductile metals, glycerin and a number of other components [1].

The closest to the invention is a metal-clad additive for lubricating oils containing in wt.%: Copper oleate 3 ... 5, copper glycerate 1 ... 3, glycerin 5 ... 10 and oleic acid up to 100 [2].

A disadvantage of the known additive is its insufficient reducing activity of the formation of protective metal-clad films, which creates difficulties in cladding metals with rubbing joints with low pressures, as well as low strength and wear resistance of the resulting films.

In order to increase synergism and activate the process of formation of protective metal-clad films on iron-containing friction surfaces (steel, cast iron, alloys), an iron salt is additionally included in the additive, and to increase the strength and anti-wear properties of metal-clad films, nickel salt, in the following composition, wt.% :

copper oleate 10 ... 15%; iron oleate 5 ... 10%; nickel oleate 3 ... 5%; glycerol 5 ... 10%; oleic acid rest.

The copper cladding process of rubbing compounds is carried out as a result of the reduction and deposition of copper, nickel and iron from salts in the presence of surfactants contained in the lubricating composition. When applied as a part of a lubricating composition, not a copper, but a composite iron-copper-nickel protective film with higher anti-wear and strength properties is formed on the friction surfaces.

An example of the manufacture of additives.

The additive is prepared on the basis of oleic acid, into which glycerol is introduced sequentially in the established proportions at the beginning, and then oleates of copper, iron and nickel are successively added. The resulting composition is intensively mixed for 10 ... 15 minutes, and then heated to a temperature of T = 90 ° C in an oil or water bath and kept at this temperature for 30 minutes. After that, the resulting composition is carefully filtered.

Quality control is carried out by the content of dissolved metals in the additive on the modified Bars-3 instrument by the method of X-ray fluorescence analysis "RSA". The metal content should be at least 5%, and the color of the resulting composition should be uniform dark green. The presence of insoluble impurities is also not allowed.

Additive Test Results.

The tribotechnical properties of the additive introduced into the M-10-G ₂ engine oil in an amount of 0.5% by weight were investigated on a modernized AE-5M friction machine according to the end-face friction scheme of three finger samples made of AO-20-1 aluminum alloy over a steel disk with drip lubrication.

The tests were carried out at a load of P = 500 N, a relative sliding speed of V = 6.4 m / s and a cycle duration of t = 3600 s. As a comparison base, pure motor oils were used in similar test modes.

The test results indicate that the use of the additive provides the formation on the rubbing surfaces of the protective composite film of copper, nickel and iron, which reduces the wear rate of finger aluminum samples by 2 times, the steel disk up to 4 times; the temperature in the friction zone by 30 ... 50 degrees, and the coefficient of friction to a value of f = 0.002.

An example of using the invention

Copper cladding of friction surfaces of the joint “crankshaft neck - liner” of the SMD-62 diesel engine during overhaul at the Rostokinsky repair plant.

Metal plating additive of the following composition, wt.%:

copper oleate fifteen iron oleate 10 nickel oleate 5 glycerol 10 oleic acid rest

in an amount of 0.5 wt.% dissolved in engine oil M-10-G ₂ and poured into the crankcase of the engine SMD-62. Operating the engine for 60 ... 1000 hours ensures the formation of the compound “crankshaft neck - liner” on the friction surfaces of the composite film of iron-copper-nickel (cladding), determined using X-ray spectral fluorescence analysis (RSFA) on a BARS-3 device .

The metal-cladding additive to the lubricant composition promotes the “healing” of microdefects (scuffs) on the necks of the crankshaft and liners with the subsequent implementation in the process of working in friction joints of selective transfer during friction (the effect of wear).

Information sources

1. Kuzharov A.S., Onishuk N.Yu. Properties and application of metal-clad lubricants. Thematic review. - M.: TSNIITEI, 1985 .-- 60 p.

2. RF patent 2044761 C1, 09/27/1995.

Claims (1)

A metal-clad additive for a lubricant composition containing copper oleate, glycerin and oleic acid, characterized in that it further comprises iron oleate and nickel oleate in the following ratio, wt.%: Copper oleate 10-15 Iron oleate 5-10 Nickel oleate 3-5 Glycerol 5-10 Oleic acid Rest