SU1151571A1 - Coolant for machining metals - Google Patents

Abstract

LUBRICANT COOLING LIQUID FOR MECHANICAL TREATMENT OF METALS, containing water, triethanolamine, sodium nitrite, water-soluble soap and non-heterogeneous surfactant, which also contains a salt of copper selected from the group including chloride, nitrate, sulfate and, as a water-soluble mtta, is triethanolamine soap or alkali metal salts of fatty acids C "-Cjg in the following ratio, wt.%: (L Triethanolamine 0.5-1.0 Copper salt , at Chosen from the group that includes chloride, nitrate, sulfate 0.1-0.2 Sodium nitrite 0.1-0.2 Triethanolamine alcohol or alkali metal salts of fatty acids 0.4-1.0 alcohol Nonionic surfactant 0.008- 0.01 Water Else

Description

The invention relates to coolant lubricants (coolant), in particular to aqueous fluids for the machining of metals. Pa operations mechanical processing of products as a lubricant -. coolant used water-oil emulsions with not high EP properties D. . . A lubricant based on emulsol based on mineral oils with the introduction of copper sulfate 2 is known in it. Copper sulphate is introduced in order to reduce the wear of the cutting tool, but its introduction leads to delamination and high corrosiveness of the liquid, which makes it difficult to be widely used in metal working. A cooling coolant is also known, which contains copper sulfate, which together with the other inlet components forms complex compounds Sj. However, this liquid has a high corrosivity. And low anti-friction and anti-friction properties. The closest in composition and the achieved result to the proposed one is a coolant V | for mechanical processing of metals of the following composition, wt.%: 0.15-0.20 Triethanolamine 0.20-0.25 Oleic acid 0.30-0, AO Sodium nitrite Mylonaft (water-soluble soap) Boric acid Calcium soda Polio siz telyir an0 , 1-0.5% alkylphenol Up to 100.0 Water A disadvantage of the known lubricating fluid is its low lubricity, characterized by low counter-resistance, anti-wear and antifriction properties. The aim of the invention is to increase the lubricity of the fluid, i.e. improvement in extreme pressure, pro 712 T1 wear and antifriction properties. To achieve this goal, a cutting fluid for machining metals, containing water, triethanolamine, sodium nitrite, water-soluble soap and non-ionic surfactant, additionally contains a copper salt selected from the group including chloride, nitrate, sulfate, and as a water-soluble soap triethanolamine soap or alkali metal salts of fatty acids in the following ratio, wt.%: Triethanolamine 0.5-1.0 Copper salt, selected from the group including chloride, nitrate, sulfate 0, 1-0.2 Sodium nitrite 0.1-0.2 Triethanolamine soap or alkali metal salts of fatty acids 0.4-1.0 Non-ionic surfactant 0.008-0.01 WaterExtractive Use triethanolamine or potassium as a water-soluble soap Soaps of individual, for example, oleic, synthetic fatty acids (FFA) fraction C (and the bottom residue SJ1 C-2 and Bbuiie (approximately fraction Cj-Cjo). During the cutting process, water-insoluble copper-containing compounds are formed. These compounds have a high adhesion to the metal and form a copper film on it, which prevents scratching of surfaces and reduces friction and wear. Use in the proposed coolant-soap mixture, which includes soaps based on unsaturated natural fatty acids, such as oleic acid, improves the stability of the liquid and facilitates its preparation (it is possible to prepare it in cold water). The proposed coolant uses a copper salt selected from the series: chloride, nitrate, sulfate, with the same positive effect. As

3

anti-corrosion additives in the proposed composition is injected sodium nitrite. From nonionic surfactants, it is advisable to use OP-7, OP-10, sintanol DS-10, sintanol DT-7, etc.

The coolant-offered fluid is a clear or translucent fluid that has high lubricity, stability, resistance to biodegradation (both bacteria and fungi), as well as good detergent and anti-corrosion properties. For the preparation of the working composition of the proposed cooling fluid, two concentrates are separately prepared.

In hot water (temperature 7090 ° C), which is 5% of the total

1515714

quantities of the prepared liquid; dissolve the water-soluble soap (concentrate). Then, triethanolamine, copper salt, sodium nitrite, and nonionic surfactant (concentrate P) are then dissolved in the same amount of water at ambient temperature.

The working concentration of the proposed 10 coolant is obtained by successively dissolving in the remaining amount of water at a temperature of the surrounding medium, first the first and then the second concentrate.

15 Changing the order of dissolution of the concentrates impairs the lubricity of the proposed liquid.

In the described manner, the following 20 coolant compositions were prepared (Table 1).

1151571

The coolant compositions of coolant No. 1-13 are carried out in comparison with the known (composition No. 14), wt.%:

Triethanolamine 0.17

MylonAft 0.66

Oleic acid 0,23

8 Continuation of table 2

Claims (1)

LUBRICANT COOLING LIQUID FOR MECHANICAL PROCESSING OF METALS, containing water, triethanolamine, sodium nitrite, a water-soluble soap and a non-ionic surfactant, it is also recommended that, in order to increase the lubricity, the liquid additionally contains a copper salt selected from the group consisting of chloride, nitrate, sulfate, and triethanolamine soap or alkali metal salts of fatty acids C ₍₁ ~ C ₃₀ in the following ratio of components, wt.%: as a water-soluble soap) Triethanolamine Copper salt selected from the group consisting of chloride, nitrate, sulfate Sodium nitrite Triethanolamine soap or salt 0.5-1.0 0.1-0.2 0.1-0.2 alkali metals of fatty acids Sr-Sad 0.4-1.0 Nonionic surfactant * 0.008-0.01 Water Else SU ... 1151571> <1151