SU1244172A1 - Agent for removing carbon deposits from metal surface - Google Patents

Description

one

The invention relates to means for degreasing and cleaning a metal surface, it can be used in coal, autotractor and other industrial fields to remove thermally impacted soils.

Units and pipelines of mine compressors are contaminated with specific compact soot consisting of

1244172 2

tar residues of oils and lubricants,. carbon, coal and other dust.

The presence of contaminants reduces the performance of the units, causing a 5-year overuse of electricity at. their work and cause explosions. The aim of the invention is to increase the detergent action.

The invention is illustrated by the following 10 test examples of the formulation of the agent presented in Table 1.

-

-

0.1

0.4

0.5

0.15 0.2

0.5

0.6

0.8 1.5

0.05 0, .05 0.1 0.5 0.9 1.5

0.1 0.3 1.0

The rest is up to 100

120 60 45

In order to test the ability to remove carbon deposits, the tube sections of the heat exchanger of a shaft compressor with a 2- 2.5 mm layer of soot are immersed in the test composition heated to 65-70 s, and held in it without stirring. Table 1

0.3

0.4

0.5

0.6

3.5

3.0

3.5

40

40

40

or until the metal surface is completely cleaned, note the time required for cleaning in the test solution.

In the tested formulations there are alcohols and salts listed in table 2.

out

BenzylNH1,0

Ethylene glycol CI2,5

GlycerinA13,5

Comparative testing of formulations 3 of the described composition with the replacement of phenylethyl alcohol with isopropyl m,

For cleaning, use the specimens in the form of plate segments of the gate comb of the continuous flow valve of the shaft compressor, having natural carbon deposits.

Samples are weighed on an analytical balance, placed in a test composition that is in a flask with a reflux condenser, and kept in it at .60 ° C for 40 minutes without stirring.

The cleaned plates are rinsed in running cold water, dried for 30 min in the flow of fan air and re-weighed to determine 3,430

3.3742 3.3713 0.1088 0.1117

table 2

Zn 2.5 Ni 0.5

4 5 6

dividing the amount of flushed soils.

The remaining dirt on the wafer is removed with an ink eraser, the wafer is weighed to determine the weight in pure form.

The washing ability is determined by the formula

thirty

“С - 1-Е-Гt; about

100,

where P is the weight of the contaminated plate; p is the weight of the plate after washing; p is the weight of a clean plate, Fe ° test results are given in table 3.

Table 3

97.4

It follows from the above data, Examples 1-3 relate to the proposal that the proposed remedy possesses the composition of formulation No. 3; primen- higher monzshchy ability. ry 4-6 to the known.

Claims (2)

1. MEANS FOR REMOVING SALON FROM A METAL SURFACE, containing alcohol, triethanolamine, disodium salt of ethylenediaminetetraacetic acid, polyoxyethylated monoethanolamide of synthetic fatty acids of fraction C ₁₀ -C _{) 6} , sodium benzenesulfonate and water, which increases it additionally contains a salt of hydrofluoric acid from the group comprising a cation of ammonium, alkali metal, zinc, tin, copper, aluminum, nickel, or a mixture thereof, polydiethylene glycol succinate and sodium tripolyphosphate in the following ratio of components, wt.%: alkylate with caesred Disodium salt of ethylenediaminetetraacetic acid Polyoxyethylated monoethanolamide of synthetic fatty acids of fraction ^ 10 ~ C, ₆ Sodium alkylbenzenesulfonate Sodium tripolyphosphate Polydiethylene glycol succinate Ammonium chloride, sodium hydroxide salt Water 2. A tool for e π. 1 0.15-0.50 0j50-0.90 0.80-2.40 0.90-2.50 0.05-0.25 Alcohol Triethanolamine 0.20-1.00 0.50-1.00 This contains ethyl alcohol or glycerin. , about t l and that as benzyl or or ethylene glycol, Yu - h and spirphenyl2