SU1213086A1 - "nikolin" solution for degreasing metal surfaces - Google Patents

Abstract

A solution for degreasing metal surfaces containing a surfactant, trisodium phosphate, and carboxymetylcellulose, characterized in that, in order to extend the life and expand the range of application of the solution, it additionally contains sodium sulfate, sulfuric acid, pine extract, and as a surfactant, a substance selected from the group of synthanol DS-10, synthanol DT-7, synthamvd-5 or their mixture with the following ratio of components, g / l: surfactant selected from the group Syntanol DS-10, syntanol DT-7, sintamide -5 or their laugh Cal0.7-0.9 Trisodium Phosphate 7-9 Carboxymethylcel-g Lyupoza 0.7-0.9 Sodium Sulphate 26-28 Coniferous Extract0.3-0.5 Sulfuric Acid () 0.05-2.0 5 CO about 00 Od

Description

The invention relates to the chemical treatment of the surface of metals and can be used to degrease and clean the surface of articles made of various metals.

The purpose of the invention is to extend the life and expand the scope of the solution, i.e. the possibility of degreasing various metals.

The compositions of the proposed solution Nikolin are prepared as follows.

10 liters of tap water are placed in the tank of the laboratory washer and dissolved in it when bubbling with compressed air specified quantities of components, putting them in the following sequence: sodium sulfate; trisodium phosphate; sulfuric acid to pH 7-7.5 or 8.5-9; dry (natural medicinal coniferous extract; carboxymethylcellulose; DS-10 sintanol, DT-7 sintanol, S-amide-5, or their mixture in an arbitrary mass ratio.

The resulting Nikolin solution is heated to a given experimental temperature, a series of parts made of steel, copper, brass aluminum, zinc or their alloys with an average degree of surface contamination with lubricating oils (up to 5 g / m) is immersed in it on the suspensions and continue the continuous barbotage compressed by air. At specified intervals, the three parts are removed from the degreasing solution, washed for 0.5-1 min in running water, and the average duration of the degreasing process is determined by the extent of wetting of the surface of the parts with water.

It was established in the experiments that during 30 minutes of steel, copper and brass parts in a solution of a mixture of 20-30 g of sodium sulfate and 5-10 g of trisodium phosphate in 1 liter of water acidified with sulfuric acid to pH 8.5-9 (Nicolin - SM) and heated to 80 ± 5 C, no noticeable changes in the structure of the surface layer of the parts occur. Similarly, in parts made of aluminum, zinc and their alloys, no disturbances of the surface layer are observed when they are kept for 30 minutes in an aqueous solution of a mixture of these salts, acidified with sulfuric acid to a pH of 7-7.5 (Nikolin-AC) and heated to 50+ 5 s. In connection with this, upon receipt

o

five

0

five

0

five

0

five

for the compositions of the Nikolin solution, the pH value of the medium in them is established depending on the chemical nature of the metal from which the degreased parts are made: 8.5–9 and 7–7.5, respectively.

The compositions of degreasing solutions are given in table. 1, and the results of determining the optimum ratio of the components in the compositions proposed by Nikolin solution and the duration of the processes of complete degreasing of the surface of the parts with their help are given in (Tables 2 and 3 ..

As can be seen from the comparison of the results table. 2 and 3, the optimal ratio of components in the solution Nikolin corresponds to compositions 2-4, 6-8 and 9 is within, g / l: Sintanol DS-10 (compounds 2-4), syntanol DT-7 (composition 6) and sintamide 5 (Composition 7) or their mixture (Compositions 8 and 9) Carbonate trisodium phosphate with cellulose

Sodium Sulfate Dry Natural Medical Coniferous Extract Sulfuric Acid

(up to pH 7-9) 0.05-2.00 If the composition of the Nikolin solution is kept within the specified limits and the pH of the medium is within the range of 8.5-9 (Nikolin-CM), the optimum degreasing temperature of steel, copper and brass parts is within 60-80 ± 5 С and the optimal time of this process is 1-3 minutes.

In tab. 4 shows the optimal proposed composition of 1 solution Nikolin and in known compositions 2 and 3. Experiments on degreasing hoists (bodies of starters CT-365) with compositions according to table. 4. carried out at the same temperature in the range of 40-60 ± 5 ° C and the average degree of contamination (15 g / m), and their results are shown in Table. five.

0.7-0.9 7-9

0.7-0.9 26-28

0.3-0.5

As can be seen from the table. 5, complete degreasing of the surface of steel parts with Nikolin solution at a temperature of 40 + 5 ° С is achieved in 10 minutes, with composition 2 without the addition of gasoline for 23 minutes, and with the addition of gasoline - with 16 minutes, composition 3 with

19 min When the temperature rises from

40 to 60 With the effectiveness of compounds 1

and 2 is aligned, but at the same time

gasoline volatility increases that

undesirable from the technical point of view

security.

If the composition of the Nikolin solution is kept within the specified limits and the pH of the medium is within the range of 7-7.5 (Nikolin-AC, the optimum temperature for degreasing aluminum, zinc and their alloys parts is within 40-50 + 5 €, and the optimal time for this process is 7-10 min.

From tab. 2 and 3 also shows that the use of components of the solution Nikolin in quantities below the lower limit (composition 1) leads to a decrease in the effectiveness of the solution, which is manifested in an increase in the duration of the degreasing process, and the use of the same components in quantities above the upper limit (composition 5) practically inappropriate, since it does not lead to a further reduction in the duration of the degreasing process, but rather causes an unjustified increase in the consumption of components due to

Sodium sulfate Trisodium phosphate Sintanol DS-10

Carboxymethyl Cellulose

25 26 27 28 29 27 27 27 27 6 7 8 910 8 8 8.8 0.7 0.7 0.8 0.9 1.0 - - 0.35 0.35

0.6 0.6

0.8

0.7 0.8 0.9 1.0 0.80.8 0.8

Dry natural

medical coniferous

extract 0.25 0.30 0.35 0.40 0.50 0.350.350.35 0.35

Sintanol DT-7 - - - - - 0.8-0.35 0.25

Sintamide 5 - - - - -. -0,80,10 0,20

Sulfuric acid Up to pH 8.5-9 (for steel, copper and brass parts) or up to

pH 7-7.5 (for parts from aln iini, zinc and their alloys)

removing them from the solution on the surface of the degreased parts.

In addition, from the table. 2 and 3, vvdno, that instead of adding DS-10 synanol, equal quantities of DT-7 synthanol (composition 6) syntamide-5 (composition-7) or mixtures of surfactants with CSA-10 syntanol in various mass ratios (compounds 8 and 9), all other things being equal, does not affect the characteristics of the proposed solution for degreasing metal surfaces

Nikolin.

Dry medical coniferous extract in a degreasing solution Nikolin performs two functions: on the one CTO, it develops the aesthetics of production, and on the other hand, prevents allergic skin diseases in workers due to the calming effect on the nervous system.

Thus, the proposed solution is superior to degreasing known solutions in terms of the efficiency of degreasing, and in terms of the cost of components for preparing the same volume of solution, it is much cheaper than the known solutions.

Table 1

0.8

Note. In experiments at a temperature of 20-Zb ± 5 C, parts with an average degree of surface contamination (up to 5 g / m) are subjected to degreasing, and with a high degree of contamination (up to 20 g / m).

table 2

Components

The content of components, g / l, consisting of 1 1 2 З

Disperser NF Trisodium phosphate Caustic soda Sodium carbonate Metasilicate sodium Sulfate Dry coniferous extract Sulfuric acid

Editor N. Yatsola

 Without the addition of gasoline. With the addition of gasoline (300 SP / l).

Compiled by V. Oleinichenko

Tehred T. Dubinchak Proofreader S. Shekmar

Order 753/38 Circulation 877 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d, 475

Branch PPP Patent, Uzhgorod, st. Project, 4

30.0

20.0 15.0

3.0 10.0 35.0

30.0

27.0 0.4 0.1

Table 5

Claims (1)

A solution for degreasing metal surfaces containing a surfactant, trisodium phosphate and carboxymethyl cellulose, characterized in that, in order to increase the duration and expand the scope of the solution, it additionally contains sodium sulfate, sulfuric acid, coniferous extract, and as a surfactant - a substance selected from the group of syntanol DS-10, syntanol DT-7, syntamvd-5 or their mixture in the following ratio of components, g / l: Surfactant selected from the group Syntanol DS-10, syntanol DT-7, syntamide-5 or their mixture Trisodium phosphate Carboxymethylcell-g lulose Sodium Sulfate Coniferous Extract Sulfuric acid ( _P N = 7-9) 0.7-0.9 7-9 0.7-0.9 26-28 0.3-0.5 0.05-2.0