SU859425A1 - Metal-plating additive - Google Patents

Description

one

The invention relates to lubricant compositions and the use of chemicals as components of lubricant compositions and is intended to improve the wear resistance of parts of friction units of machines lubricated with hydrocarbon oil.

Oil-soluble additives based on lithium and aluminum salts of fatty acids are known for thickening oils, improving antifriction and extreme pressure properties of materials during friction. Lithium stearate is presumed to be the case, since alkinini stearate is less resistant to decomposition and oxidation. The use of such compositions in industrial equipment allows to reduce the loss of oil due to its thickening by 28-88% l.

Due to the adsorption on the surface of friction, these additives increase the antifriction characteristics, however; they do not possess possession of a cladding effect. In addition, due to the small. solubility in mineral oil may form a precipitate during operation, which makes the gi additives unsuitable for use in lubricants operating in cyclically closed systems or when applying lubricants to the friction unit through small gaps.

Anti-seize metal-cladding and antifriction additives to liquid lubricating oils based on cadmium salts of a fatty acid of acetic acid or dicarbonic oxalic acid are also known 2.

These additives have a significant disadvantage in that the acids from which these salts are derived have a short hydrocarbon chain. Therefore, these acids and their salts practically do not show

15 surface activity both at the boundary with air and at the boundary with metals, which, besides the cladding metal film on the rubbing surfaces, does not allow for the creation of a protective

20 adsorption layer.

The purpose of the invention is to increase the anti-wear properties of the tool.

This goal is achieved by the fact that the metal plakirunvda additive containing the fatty acid salt additionally contains oleic acid and as the fatty acid salt of bna contains monovalent copper oleate with the following ratio of components, wt.%:

Monovalent copper oleate 25-60

Oleic acid Up to 100 Tests of the antiwear and extreme pressure properties of the proposed additive were carried out on MUSCED friction: MTs-2 and specially designed equipment for use in controlled environments.

The test specimens have roller forms (steel A-12, cast iron MF 18-36; and pads JCh 18-36). The sliding speed of the samples during the experiment was determined by the dependence of wear of the pair of steel A-12 steel - cast iron MF 18-36 atm of additive concentration in HF-12-16 oil for 1 h of operation under a load of 25 kgf / cm and sliding speed of 2 m / s

em 2 m / s at specific loads of 25.0 and 50 kgf / cm.

As a base oil, use mineral oil HF 12-16. A mixture of oleic acid and copper oleate is dissolved in oil HF 12-16 at 4060 ° C. The solubility is checked according to the procedure described in GOST 10644-77. No precipitation was observed.

The test results of anti-wear properties of additives to the oil HF-12-16 with different ratios of salt and acid are presented in table 1 and table 2.

Table 1

0.5

6

5 8 1.0 O

50

0

4 3

0.03

0.05

0.075 2

8 6 4 3

40

ABOUT

0.005 0.01 0.02

As can be seen from Table 1, the best results are obtained when using an optimal concentration of X0.075% by weight of an additive consisting of 50 ° C.% oleic acid and 50% by weight of copper oleate (1).

 The greater loss that occurs when using the optimal amount of T additive is explained, apparently, by the Rebinder effect, while using the additive, an insufficient amount of salt in the solution.

However, in all cases there is a significant reduction in wear of the test specimens when lubricated with oil with the above additive.

7 3

2.5 Oh,

50

0.15

3 3 0,2

0.05

4 5 6

40

OD

0.2

Table 2 Dependence of wear of a pair of friction steel A-12 - cast iron MF 18-36 on the time of testing in pure oil with a load of 50 kgf / cm and speed of 2 m / s

Tests on scoring resistance, performed on a pair of friction cast iron-cast iron with a step load at a speed of 2 m / s, showed that when 0.1% of the above additive was introduced into the oil, the scoring resistance na {Xd rises from 60 to 150 kgf / cm

The use of the proposed additive allows to reduce the wear of the plastics materials during the priming by 2 to 5 times, and in some cases to eliminate it completely, to improve the extreme pressure properties of the lubricant (for example, for a pair of friction cast iron-cast iron when lubricated with HF-12-16 oil 250%).

The required amount of the proposed additive is hundredths, percent of the total weight, which practically does not affect the physicochemical properties of the base oil.

We offer additive soluble in oil HF-12-16, MS-20 and. other hydrocarbon maslois at. temperature 4О-б®С, i.e. 2-2.5 times lower than known. This makes it more technologically advanced and completely eliminates the evaporation of low-boiling lubricant components during heating during the elimination of the additive.

 the invention

Metshacking additive containing a salt of a fatty acid, characterized in that, in order to increase the anti-allergic properties of the additive, it additionally

0 contains oleic acid and, as a salt of a fatty acid, it contains monovalent copper oleate in the following ratio of components, wt.%;

five

Monovalent oleate

medi25-60

Oleic acid Up to 100

Sources of information taken into account in the examination

0

1. The patent of England No. 1341738, cl. C 5 F, pub. 1973.

2. Automated USSR certificate W 288212, cl. C 10 M 1/24, 1968 (prototype).

Claims (1)

Claim A metal-cladding additive containing a fatty acid salt, characterized in that, in order to increase the antiwear properties of the additive, it additionally contains oleic acid and as a fatty acid salt it contains monovalent copper oleate in the following ratio, wt.%: Monovalent Copper Oleate 25-60 Oleic acid Up to 100