SU1257117A1 - Composition for conditioning copper and its alloys - Google Patents

Abstract

This invention relates to the chemical cleaning of articles from copper and its alloys from residues of polishing pastes. The purpose of the invention is to increase the degree of purification, which is achieved by treatment in a composition containing, g / l: alkali metal phosphate 20-25; surfactant - ammonium butyloctadecanoato-9-sulphate (avirol OG) 2-3; carbamide 2-3; glycerol boron esters 2.5-40.2. 2 tab. (L to cd

Description

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The invention relates to chemical cleaning, in particular to the cleaning of copper products and its alloys from the remnants of polishing pastes, and can be used in the preparation of polished surfaces before applying electroplating to non-ferrous metals or alloys based on them in non-ferrous metallurgy , engineering and other industrial sectors.

The aim of the invention is to increase the degree of purification.

The composition described is prepared by the direct sequential dissolution of its components and the water preheated to 50-60 ° C. It is fire and explosion proof, non-toxic and can be used in immersion type devices with or without ultrasound or mechanical transducer.

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5.5 30.0 7.5

5.5 12.5

3.0 0.9

3.0

The choice of the concentration limits of the components is due to the fact that a decrease in their content below the limiting one leads to a deterioration of the cleansing

172

mixing for cleaning surfaces before electroplating on automatic electroplating lines,

In order to obtain glycerol boron esters in an amount sufficient to prepare 100 liters of detergent composition, 100 g of boric acid is dissolved in 1 l of preheated 70-80 s from distilled water. After the acid has completely dissolved, 300 g of glycerin and the resulting mixture It is heated for 30-40 minutes in a water bath at. The end of the reaction is judged by the pH value, which should change from 4 to 2-2.5.

In tab. 1 shows the proposed (1-5) and known (6,7) compositions. The working temperature of the solutions is 70 ° C, the cleaning time is 3 minutes.

Table 1

17,520,022,525,027,5

1,52,0 2,53,03,5

1,52,0 2,53,03,5

2,02,53,254,04,5

Up to 1 l

properties of the detergent composition. An increase in the concentrations of the highest limit is not accompanied by an improvement in the detergency of the solution.

312571

Pre-cleaned samples of copper or its alloys were polished using GOI paste, kept for 18 hours in air for a fixed paste on the surface of the part and weighed 5

(PHYCH)

After cleaning in the studied solutions, the samples were dried in air to the full weight of C.). The weight of the pure sample (Pc., .., -.) Was determined by the gravity grades.

(washing action),% 78.5

23.9 83.8

The data table. 2 indicate 25 that, in order to increase the degree of purity, in solutions 2-5, a high degree of cleaning of the surface from polishing paste residues is achieved, which predominates the washing action of known solutions.

Claims (1)

Invention Formula A composition for cleaning copper and its alloys, containing an alkali metal phosphate and a surfactant, characterized in that. Editor N.Shvyschka Compiled by V.Oleynichenko Tehred I. Popovich Corrector, A.T. Order 4883/21 Circulation 878 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 after dissolving residual impurities in acetone. The degree of purification was calculated by the following formula: r - p P - P NamMiitT 100(%). Comparative data characterizing the work of known (6 and 7) and the proposed detergent compositions are given in table. 2 Table z 91.2 92.8 94.2 94.3 ki, it additionally contains carbamide and boric zirrs of glycerin, and as a surfactant it contains ammonium butyloctadecanoato-9-sulfate (Avirol OG) in the following ratio of components, g / l: Avirol OG2-3 Urea2-3 Glycerol boron esters2,5-4,0