Anticorrosive composition

FIELD: protective materials.

SUBSTANCE: invention relates to compositions used for applying covers. Composition contains zinc and water glass - potassium water glass as a binding agent with silicate modulus 4.8-5.3 or mixture of sodium-lithium water glass with silicate modulus 3.8-4.2 comprising the following components: soluble sodium silicate, technical lithium hydroxide, fumed silica, drinking water and ferrophosphorus. Invention can be used for protection of ferrous metals against corrosion with zinc-filled compositions. Invention provides improving anticorrosive and antifriction properties, enhancing wear resistance, electric conductivity, durability against cracking in drying, enhanced adhesion to metal, welding capacity, strength at impact.

EFFECT: improved and valuable technical properties of composition.

1 tbl

 

The invention relates to compositions for coating and can be used in various industries: machine-building, shipbuilding, transportation, oil production and refining for protecting ferrous metals from corrosion cinnabarinum compositions.

Known anticorrosive composition brand cves (Technical conditions TU K-O-04-93 "Composition anticorrosive brand CVAs")containing fine zinc powder PCVD and ethyl silicate binder with mixing ratio from 1:1 to 2:1.

This composition has the following disadvantages: low wear resistance of the coating in the operating conditions of the rubbing surfaces, the content in the composition of ethyl alcohol (up to 50% of the binder), the use of which leads to increased fire and explosion and the deterioration of sanitary-hygienic working conditions, cracking while drying, deterioration of the quality of the weld during welding.

Closest to the claimed and accepted as the prototype is corrosion-resistant zinc-silicate composition of the silica compound-zinc-2 (SP-2) (Valery A. Orlov. The zinc silicate coating. M: mechanical engineering, 1984, p.13-16)containing zinc and binder-liquid glass.

This composition has a low adhesion to the metal surface, requires the application of hardener in the coating obtained is output with its help, low-friction properties and wear resistance.

The objective of the invention is to provide a composition that can achieve a superior anti-corrosion and anti-friction properties, high wear resistance, electrical conductivity, resistance to cracking when drying, adhesion to metal, weldability, strength at impact.

The problem is solved due to the fact that the anti-corrosion composition comprising zinc and a binder - liquid glass additionally contains Ferragosto, and as a binder in liquid - glass - contains potassium liquid glass with silicate module 4,8-5,3 or a mixture of sodium-lithium silicate with silica modulus of 3.8-4.2 composition, wt.%:

sodium silicate soluble18,0
the lithium hydroxide technical2,4
white black8,1
drinking water71,5,

in the following ratio of the components of the composition, wt.%:

zinc36-64
Ferragosto16-24
potassium liquid glass with silicate module4,8-5,3
or the mixture of sodium-lithium liquid
glass silicate module 3,8-4,220-40.

The introduction of the claimed composition of Ferragosto Fe2P 16-24% can improve anti-corrosion properties, as in the interaction of the coating with the environment is the formation of compounds with ionic bond type IU(OH)+and IU++(Me - metal) and oxides of metallic included in the composition. Compounds with ionic bond increase the adhesion of the coating to the metal surface and the resistance values of the electrode potentials.

The use of a mixture of sodium-lithium liquid glass composition, wt.%: sodium silicate soluble - 18,0; lithium hydroxide (technical) - 2,4; white soot - 8,1; drinking water is 71.5, allows you to accelerate the cure.

To study the wear resistance and antifriction properties was conducted complex research works on the floor of the front springs of a vehicle KAMA-55111 the claimed composition, prototype and paint on current technologies and their bench tests in terms of Chusovoy metallurgical works".

The summarized results of the indicators of life given in the table:

tr>
no party springsTrackDurability, cycles
NminNmaxN
1SP prototype50000the 125,000101204
2SP prototype93480120040106065
3SP prototype96480the 125,000108628
4Declare97680120840110000
zinc, %Fe2R %binder, %
641620
5Declare97440147300124760
zinc, %Fe2P %binder %
502030
6Declare107640136200120080
zinc, %Fe2P %binder, %
362440
where Nmin- the minimum number of cycles until breakage of the springs;

Nmax - maximum number of cycles until breakage of the springs;

N is the average number of cycles of each batch of springs;

The number of parties 6, springs in lot 5 pieces.

After testing the springs was disassembled and inspected all the sheets. During the inspection focused on:

- the presence or absence of nagarjuniana coverage;

- the presence or absence of delaminations and cracks in the pavement;

the appearance of corrosion;

- seats and the nature of the abrasion.

Spring leaves before and after the test were subjected to the test for adhesion, hardness and impact strength of the coating.

As can be seen from the table, when using the claimed composition (units 4-6) increases the durability of the springs due to the increase of wear resistance and improved anti-friction properties of the coating.

Thus, the application of the proposed composition allows for improved anti-corrosion and anti-friction properties, high wear resistance, electrical conductivity, resistance to cracking when drying, adhesion to metal, weldability, strength at impact.

Anti-corrosion composition comprising zinc and a binder - liquid glass, characterized in that it further comprises Ferragosto, and as a binder in liquid - glass contains potassium liquid glass with Silikat the m module 4,8-5,3 or a mixture of sodium-lithium silicate with silica modulus of 3.8-4.2 composition, wt.%:

Sodium silicate soluble18,0
The lithium hydroxide technical2,4
White black8,1
Drinking water71,5

in the following ratio of the components of the composition, wt.%:

Zinc36-64
Ferragosto16-24
Potassium liquid glass with silicate module4,8-5,3
or the mixture of sodium-ion
liquid glass with silicate module 3,8-4,220-40



 

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1 tbl

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< / BR>
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FIELD: chemistry, in particular coating compositions, dyes and colorings.

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2 tbl, 4 ex

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EFFECT: improved and valuable technical properties of composition.

1 tbl

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2 tbl, 16 ex

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40 cl, 9 ex, 4 tbl, 8 dwg

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5 cl, 1 tbl

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