DE1644908B2 - LUBRICANT - Google Patents

Description

4.0

2.5

2.2

4.1

2.8

2.8

19.9

14.0

13.1

These properties are all the more surprising and could be found in the known prior art to s ^ sveniger derived sserden, da, svie a comparison with preparations of the same type containing tin pyrophosphate and magnesium pyrophosphate shows which claimed compounds apparently a special position compared to these known compounds take in.

Table II

Sn ₂ P ₂ O ₇ .
Mg ₂ P ₂ O-

At 30 kp load

Wear surface

(mm ⁵ )

20.6
19.8
17.9
24.3
20.1
19.8

The outstanding and unforeseeable suitability of the pyrophosphates claimed according to the invention also shows the comparative test of a solid

¹ “suspension in paraffin oil (Marcol 80) on the Ahnen-Wieland machine.

Table 111

Resilience

Fe ₁ (PoO ₇ J ₃
/η.,Ρ.,0,.
MoS., ....
_t Sn..P..O,.
McP-O ₇ .
Zn, (PO,).,

2000 kp with elongation 2000 kp with elongation 14GÖkp with crack 950 kp with crack 700 kp with crack 1000 kp with crack

The addition of pyrophosphates can ; - · .Ίη or mixed with each other as lubricants ; .U such, as well as in the form of preparations with hich known carriers can be used. It V. can also use other solids, preferably solid lubricants, such as molybdenum disulphide, / inksiilfid, calcium fluoride, water-soluble phosphates, (. •, • ganic solid lubricants and the like additionally included : ..tzi will be.

Carriers known per se can be mineral oils, synthetic oils, fetal oils, and water-soluble organic oils Compounds such as glycols, water or aqueous salt solutions, for example silicate solutions or phosphate solutions, which are also known per se other additives, such as dispersion stabilizers, May contain oxidation stabilizers, viscosity improvers, inhibitors, soaps, Find use.

Pasty preparations preferably contain 40 to 80 percent by weight pyrophosphate, fatty preparations preferably 1 to 10 percent by weight pyrophosphate, oily and aqueous suspensions preferably 0.5 to 20 percent by weight of pyrophosphate and suspensions in glycols and aqueous salt solutions, preferably 0.5 to 20 percent by weight of pyrophosphate, each based on the total mass.

Oily and fatty preparations are preferred for the lubrication of sliding points on machines usual temperatures used; pasty preparations for preparation before assembly; aqueous Preparations especially in the hot forming of metals and those with glycols preferably in the Cold forming of metals.

Claims (7)

Patent claims: 1. Use of Eiser.pyrophosphat and / or zinc pyrophosphate as a lubricant or as a component of a lubricant. 2. Use of 40 to 80 percent by weight of pyrophosphate, based on the total mass, as Component of a pasty lubricant preparation according to claim 1. 3. Use of 1 to 10 percent by weight of pyrophosphate, based on the total mass, as Part of a greasy lubricant preparation according to claim 1. 4. Use of 0.5 to 20 percent by weight of pyrophosphate, based on the total mass, as Component of an oily lubricant suspension according to claim 1. 5. Use from 0.5 to 20 percent by weight Pyrophosphate as a component of an aqueous? -O suspension according to claim 1 6. Use of 0.5 to 20 percent by weight of pyrophosphate as a component of a lubricant suspension based on glycols. according to claim 1. 7. Use of 0.5 to 20 percent by weight of pyrophosphate as a component of a lubricant suspension based on aqueous salt solutions according to claim 1. 25 and thiophosphorus compounds, for example son phosphorescent or metal compounds, it has already been sent for lubrication purposes. These substances, which are mostly used as additives, have the effect that decomposition occurs at the stressed friction points and the resulting phosphide _{acts with the MeL 1} Ii in the manner of a corrosive lubrication. There is also already the use of phosphates, carbonates, borates and sulfides of the elements of the two; .- :; Group of the periodic system and lead _<:! of tin as lubricants or lubricantziKivv; described. Surprisingly, 'dal' has now been found. ^ Pyrophosphute of iron and zinc as such ·! ..! · .: together with the usual substances used in lubricants, especially in the form of Pns; ·:. Greases or suspensions have excellent lubricants, which even outperform known solid lubricants as excellent. In the ΐκ :, '· folaenden table wear values ■ are <·, -ReTchert-Verschleißsvaage testing machine which he: i.-dungssemäßen ferric pyrophosphate und'oder 7 \ ,, \ - pyrophosphate-containing preparations in \..!. same as tumblers containing Mohbden disulphide, using a 1 ° _o i: ·: solid suspension in paraffin oil (Marcol 80) :.:. ^: - led. Table I. The invention relates to the dispatch of iron pyrophosphate and / or zinc pyrophosphate as solid lubricant bzsv. as part of a lubricant. These substances sveisen z. B. in the form of preparations, which contain known carriers, excellent in the form of pastes, fats or suspensions, show superior lubricating effectiveness compared to comparable lubricants, especially with the highest Loads in the area of mixed and boundary friction. It is known, metal surfaces with the most varied, mostly free phosphoric acid and in addition To phosphate preparations containing phosphates. That way on the surfaces The sliding layers produced are not able to withstand a permanent load and are usually only sufficient for a one-off Stress and have therefore become practical, insofar as they are applied for lubrication purposes only introduced in metal deformation. If need be, such phosphate layers are also used for relief the infeed of highly stressed gearboxes. However, such layers are not in full Scope proved to be satisfactory, especially not where it is novel within the scope of the Technical progression created metal alloys, and it is especially in In special cases of cold forming, there is still a real need for suitable lubricants. It is now also known to increase the phosphate levels the aforementioned type of solid lubricants such as graphite and molybdenum disulfide to be stored. Such layers show a noticeably better lubricating behavior than the usual phosphating layers. It is also known to use salts which form eutectics, including water-soluble alkali metal phosphates, for lubrication in the hot working of metals. A variety of organic phosphorus Fe ₁ (P ₂ O ₇ ) -,
Zn ₂ P ₂ O ₇ .
MoS, .... At 30 kp load Wear surface (mm ² )