RU2456340C2 - Industrial detergent - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: industrial detergent contains the following in wt %: surfactant 1.5-1.8, antifoaming agent 0.1-0.2, demulsifying agent 0.4-4.0, corrosion inhibitor 0.001-0.002, alkali 7.0-7.5, active component - the balance. In the disclosed industrial detergent, the surfactant used is a mixture of nonionic surfactants - synthanol and OP-10; the corrosion inhibitor is sodium benzoate; the active component is a mixture of alkali metal salts - sodium carbonate, sodium phosphate and ammonium sulphate.

EFFECT: high detergent power, corrosion resistance and good quality of the zinc coating when cleaning rolled metal products in belts before zinc plating.

2 tbl

Description

The invention relates to technical detergents and can be used in metallurgy for cleaning metal in tapes before galvanizing.

Many TMS are known, the purpose of which is to provide high washing, wetting and antifoam properties (for example, patent RU 2239651 C1).

But currently, detergents for cleaning metal in tapes before galvanizing, along with the requirements of high levels of washing, wetting and antifoam ability, are presented with others, for example, corrosion resistance and good quality zinc coating.

Closest to the invention in technical essence and the achieved result is a technical detergent (RU 2289614) containing the following components, wt.%:

surface-active substance 1,2-9 antifoam 0.1-0.2 demulsifier 0.001-4 corrosion inhibitor 0.001-7 active component rest

In this TMS, the ratio of ionic to nonionic surfactant is 1-8: 0.2-1, and the quantitative content of surfactant is 1.2-9.

As an ionic surfactant, catamine AB is used, which has preservative effects and anti-corrosion properties.

To enhance the anticorrosive properties of catamine AB, a VNPP corrosion inhibitor or sodium metasilicate is used.

Neonol or syntanol is used as a nonionic surfactant, and an alkali metal salt, such as soda ash, is used as the active component.

Disolvan or tributyl phosphate is used as a demulsifier, and a VNPP inhibitor or sodium metasilicate is used as a corrosion inhibitor.

Known detergent provides high detergency and corrosion resistance with a long cleaning time for 10 minutes.

But due to the existing equipment in metallurgy, metal in strips is cleaned at high speed for 1-3 seconds. During this time, the known detergent does not provide high detergency, corrosion resistance and good quality zinc coating

The objective of the claimed TMS is to provide high levels of washing ability, corrosion resistance and good quality zinc coating when cleaning metal in tapes before galvanizing.

This goal is achieved in that TMS containing a surfactant, antifoam, demulsifier, corrosion inhibitor and active component, is characterized in that it additionally contains alkali, in the following ratio, wt.%:

surface-active substance 1.5-1.8 antifoam 0.1-0.2 demulsifier 0.4-4.0 corrosion inhibitor 0.001-0.002 alkali 7.0-7.5 active component rest,

moreover:

- as a surfactant, a mixture of nonionic surfactant syntanol and OP-10 is used with a mass ratio of 1: 1;

- antifoam Tesil 201 is used;

- ammonium polyacrylate is used as a demulsifier;

- sodium benzoate is used as a corrosion inhibitor;

- sodium hydroxide is used as alkali;

- not one salt is used as the active component, but a mixture of alkali metal salts - sodium carbonate, sodium phosphate and ammonium sulfate with a mass ratio of 1: 0.2: 0.2.

OP-10 is the product of processing a mixture of mono-and-dialkylphenols with ethylene oxide.

Syntanol ALM-10 is a mixture of polyoxyethylene esters of synthetic primary higher alcohols of fraction C ₁₂ -C ₁₄ .

The alkali introduced into the composition significantly speeds up the cleaning process by accelerating the saponification reaction.

The use of more than one alkali metal salt as an active component (for example, soda, as in the prototype) also helps to speed up the cleaning process.

The use of sodium benzoate as a corrosion inhibitor instead of catamine AB enhances corrosion protection and provides it with a short cleaning time.

TMS is obtained by simple mixing of the components. Alkali is introduced last.

For the test were prepared 5 solutions of the claimed TMS with a different ratio of components and a solution of the known TMS.

The compositions of the washing solutions are shown in table 1.

The tests were carried out on samples with a size of 200 × 250 mm. Samples were degreased for 1-3 seconds at a temperature of 60-80 ° C.

During the tests, such indicators as washing ability, corrosion resistance and quality of the zinc coating were checked. The quality of the zinc coating was checked by a bend test.

The test results are shown in table 2

table 2 No. of funds Washing ability,% Corrosion Resistance (visual) Bending test solution pH one 96 corrosion marks are observed peeling zinc coating 12.1 2 one hundred corrosion is not observed no peeling of the zinc coating 12.5 3 one hundred corrosion is not observed no peeling of the zinc coating 12.6 four one hundred corrosion is not observed no peeling of the zinc coating 12.8 5 95 corrosion marks are observed peeling zinc coating 12.8 6 92 corrosion marks are observed peeling zinc coating 11.6

The table shows that the inventive detergent provides high levels of washing ability, corrosion resistance and good quality zinc coating when cleaning metal in tapes before galvanizing.

Claims (1)

Technical detergent (TMS) containing a surfactant, antifoam, demulsifier, corrosion inhibitor and active component, characterized in that it additionally contains alkali in the following ratio, wt.%:
surface-active substance 1.5-1.8 antifoam 0.1-0.2 demulsifier 0.4-4.0 corrosion inhibitor 0.001-0.002 alkali 7.0-7.5 active component rest,
moreover, as a surfactant, a mixture of nonionic surfactants — syntanol and OP-10 — is used as a corrosion inhibitor — sodium benzoate, and as an active component — a mixture of alkali metal salts — sodium carbonate, sodium phosphate, and ammonium sulfate.