KR101324454B1 - Composition of corrosion inhibitor and coating method thereof and radiator coated with corrosion inhibitor - Google Patents

Abstract

The present invention relates to a rust preventive composition, a method for coating a rust preventive agent and a radiator coated with a rust preventive agent, and specifically, including zinc, aluminum, titan tetrabutanolate, solvent naphtha, and an inorganic binder to enable thin film coating to improve heat dissipation effect, The present invention relates to an anti-corrosive composition, an anti-corrosive coating method, and a heat-resistant radiator coated with an anti-corrosive agent, which is resistant to deterioration by using an inorganic binder and capable of preventing hydrogen embrittlement and internal cracking.

Description

A rust preventive composition, a coating method thereof, and a radiator coated with a rust preventive agent {COMPOSITION OF CORROSION INHIBITOR AND COATING METHOD THEREOF AND RADIATOR COATED WITH CORROSION INHIBITOR}

The present invention relates to a rust inhibitor composition, a coating method of the rust preventive composition and a radiator coated with the rust preventive agent.

In general, the radiator for heavy electric and transformer receives heat generated inside through the insulating oil circulating the transformer and cools the insulating oil to prevent the transformer from overheating.

Since the radiator is exposed to the outside, it must be able to withstand weather phenomena such as weathering, snow, and rain, and thus the technology of stably coating the surface of the radiator is a very important factor.

Conventional coating of the radiator was mainly used for the coating by electro zinc plating and the coating by hot dip galvanizing. However, the electro-zinc plating and the hot dip galvanizing are coated by electrolysis using zinc as an anode and an iron radiator as a cathode, and at this time, the coating thickness is increased to prevent corrosion of the iron radiator. Has a problem of deterioration, and due to the increase in coating thickness, hydrogen embrittlement occurs due to deterioration when used for a long time, the radiator is locally corroded, the heat dissipation efficiency is deteriorated, and in severe cases, the flow path formed inside the radiator is blocked, and the function is lost. have.

In addition, Korean Patent Laid-Open Publication No. 2004-0042526 discloses a method for manufacturing an electro-galvanized steel sheet, but conventional electro-zinc plating or hot dip galvanizing is harmful to humans due to heavy metals and harmful substances generated during electrolysis. But there are disadvantages that cause environmental problems.

In addition, since the heat generator is large in volume, setting time is long when coating by the electro zinc plating and hot dip galvanizing, and thus the productivity is lowered and the size of the plating furnace has to be increased.

Republic of Korea Patent Publication No. 2004-0042526

SUMMARY OF THE INVENTION An object of the present invention is to provide a rust preventive agent having several times higher corrosion resistance than general electro zinc plating or hot dip galvanizing. In addition, through the radiator coating method using the same, the radiator can be used for a long time in weathering conditions such as weathering, snow, rain, etc. due to the nature of the radiator exposed to the outside. To provide a rust preventive agent and a coating method thereof.

In order to achieve the above object, the present invention provides a rust preventive composition comprising zinc, aluminum, titan tetrabutanolate, solvent naphtha and inorganic binder.

In addition, the present invention (a) a pretreatment step including a short treatment or a phosphate coating treatment after the degreasing treatment for the radiator material; (b) coating the anti-corrosive agent comprising the anti-corrosive composition of claim 1 on the surface of the pre-treated radiator material; (c) a drying step of heating the surface coated with the rust inhibitor; (d) a curing step of heating the dried surface; And (e) a cooling step of cooling the cured surface.

The present invention also provides a radiator coated with a rust preventive composition comprising zinc, aluminum, titan tetrabutanolate, solvent naphtha and an inorganic binder.

The rust preventive agent according to the present invention may be mixed with zinc and aluminum as raw materials to allow ultra-thin coating, and may rapidly transfer heat generated from the radiator to the air to improve the heat dissipation effect, and also greatly reduce the material cost.

In addition, the use of environmentally friendly inorganic binders are not only harmless to the human body, but the inorganic binders are resistant to deterioration, and thus they can be used safely for a long time because brittleness or cracks do not occur even when used for a long time.

In addition, the anti-corrosive coated radiator has several times stronger corrosion resistance than general galvanized or hot dip galvanized radiator, so that it can withstand weathering and various weather phenomena for a long time. It can be used safely for a long time.

1 is a conceptual diagram related to the anti-corrosive coating method of the present invention.

Hereinafter, the present invention will be described in detail.

The present invention provides a rust preventive composition comprising zinc, aluminum, titan tetrabutanolate, solvent naphtha and an inorganic binder.

Specifically, the zinc plays a role of preventing corrosion in the rust preventive composition, and preferably 30 to 60% by weight based on the total weight of the rust preventive composition, and when satisfying the above range, with respect to a metal such as a radiator coated with the rust preventive composition It can exhibit excellent rust preventing performance.

The aluminum plays a role of preventing corrosion in the rust preventive composition like the zinc, and preferably contained in an amount of 1 to 10% by weight based on the total weight of the rust preventive composition, and when the above range is satisfied, a metal such as a radiator coated with the rust preventive composition It can exhibit excellent antirust performance by supplementing the antirust performance of zinc for.

In this case, the zinc and aluminum may be mixed with the rust inhibitor composition to be used for ultra-thin coating, and the corrosion resistance may be improved even when used for a long time with respect to the radiator coated with the rust inhibitor.

The titan tetrabutanolate serves as a diluent in the rust preventive composition, it is preferably included in 10 to 20% by weight based on the total weight of the rust preventive composition, when the above-mentioned range is satisfied the corrosion of zinc excellent resistance to white rust Can be represented.

The solvent naphtha serves as a diluent in the rust preventive composition, it is preferably included in 5 to 10% by weight based on the total weight of the rust preventive composition, and when the above-mentioned range is satisfied, excellent corrosion resistance with other components of the rust preventive composition Can be represented.

The inorganic binder is not harmful to the human body because no heavy metals or toxic substances are added to the inorganic binder, and it is resistant to deterioration so that brittleness or cracking does not occur after coating. In this case, the inorganic binder is preferably included in an amount of 5 to 30% by weight based on the total weight of the rust inhibitor composition. When the inorganic binder is satisfied, the inorganic binder may exhibit excellent corrosion resistance together with other components of the rust inhibitor composition.

In addition, the inorganic binder is preferably at least one selected from the group consisting of titan tetrakis (2-ethylhexanolate), poly titan tetrabutanolate, naphtha, trimesoxyvinylsilane and ethylhexanol, but is not limited thereto. It is not.

The rust preventive agent of the present invention may be used to prevent corrosion of radiator materials such as heavy electric and transformer, but is not limited thereto.

The present invention (a) after the degreasing treatment for the radiator material, a pretreatment step including a short treatment or phosphate coating treatment; (b) coating the anti-corrosive agent comprising the anti-corrosive composition of claim 1 on the surface of the pre-treated radiator material; (c) a drying step of heating the surface coated with the rust inhibitor; (d) a curing step of heating the dried surface; And (e) a cooling step of cooling the cured surface.

Preferably, the (a) pretreatment step is to charge the radiator material, such as heavy electric or transformer material into the pretreatment facility to undergo degreasing to remove the oil, to remove the foreign matter and oxide film with a short ball made of iron or stainless steel. Short treatment or phosphate coating treatment for treating phosphate on the surface.

Wherein (b) coating the rust preventive agent is to spray the anti-corrosive composition comprising zinc, aluminum, titanium tetrabutanolate, solvent naphtha and inorganic binder of the present invention on the surface of the radiator material subjected to the (a) pretreatment step It is preferred to include the step. At this time, it is preferable to maintain the viscosity of the rust preventive agent in a DIN 3mm cup 25 to 45 seconds in the coating step, the temperature of the rust preventive agent is 18 to 28 ℃, humidity is preferably 65% or less.

The drying step (c) is preferably dried by heating for 4 to 6 minutes in a hot air of 70 to 130 ℃ temperature on the surface of the radiator material coated with the rust preventive composition, the curing step (d) The surface of the rough radiator material is preferably cured by heating for 20 to 40 minutes with hot air at a temperature of 180 to 300 ° C.

Thereafter, in the cooling step (e), the radiator material cured in the curing step (d) is preferably cooled to room temperature (25 ° C).

Furthermore, the present invention provides a radiator coated with a rust preventive composition comprising the zinc, aluminum, titan tetrabutanolate, solvent naphtha, and an inorganic binder. The radiator is preferably a radiator for a heavy electric machine or a transformer, but is not limited thereto.

Hereinafter, the present invention will be described in detail by way of examples.

However, the following examples are illustrative of the present invention, and the present invention is not limited to the following examples.

< Example  1>

One. Anti-rust agent  Produce

Zinc powder 48 wt%, aluminum powder 4.5 wt%, titan tetrabutanolat 17.5 wt%, solvent naphtha 8.5 wt%, titan tetrakis (2-ethylhexanolate) (Titantetrakis (2-Ethlyhexanolat)) 4.5 wt% %, Poly-Titantetrabutanolat, 4.5 wt%, 4.0 wt% Natrota, 4.0 wt% Trimethoxyvinylsilan and 4.5 wt% 2-ethylhexanol By mixing to prepare a rust inhibitor.

2. with radiator Anti-rust agent  coating

In order to remove the oil adhered to the surface of the transformer radiator, the surface was dried, degreased, loaded into the shot blast, and shorted with a shot ball made of stainless steel to remove foreign substances and oxide film. Thereafter, after storing the rust preventive agent of Example 1 in a container and connected to the spray connected to the compressor, the rust inhibitor was sprayed on the surface of the short-circuited radiator, and heated for 5 minutes to the surface of the radiator sprayed with the rust preventive with 110? The surface was dried. Thereafter, the surface of the dried radiator was cured by hot air of 260 ° C., and the cured radiator was naturally cooled to room temperature (25 ° C.) to coat the surface of the transformer radiator.

< Comparative Example  1>

For general electro zinc plating on the surface of the radiator, the radiator was placed as a cathode and a zinc plating solution was added to allow current to flow. The electro-zinc plating process is a pretreatment facility for the electrolytic degreasing treatment to remove the surface contamination of the material and pickling treatment to remove the surface oxide layer, a central equipment that is plated by current supply, phosphate for improving the corrosion resistance and paintability It consists of an aftertreatment facility for coating perchromate.

< Experimental Example  1>

Quality characteristics of the heat dissipator coated with the anti-corrosive agent of Example 1 and the heat dissipator for the general galvanized transformer were evaluated according to the test regulations of the Korea Testing Laboratory, and the results are shown in Table 1 below.

Test Items Example 1 Comparative Example 1 Coating Thickness (탆) 6.5 9.2 Corrosion resistance by chlorine spray test (hours) 1050 235 Hydrogen embrittlement by chlorine spray test none has exist

As shown in Table 1, in the case of the coating by the rust preventive agent of Example 1 is mixed with zinc and aluminum, it is possible to ultra-thin coating compared to the coating by the rust preventive agent of Comparative Example 1. In addition, in the case of Example 1, the coating thickness is 6.5㎛ thinner than Comparative Example 1, it is possible to quickly transfer the heat generated from the radiator to the atmosphere, it is possible to improve the heat dissipation effect and reduce the cost.

In addition, by using an environmentally friendly inorganic binder, not only is it harmless to the human body, the inorganic binder is resistant to deterioration and can be used for a long time without generating brittleness or cracks even when used for a long time.

In addition, in the evaluation of corrosion resistance, Example 1 was only 235 hours compared to that evaluated in 1050 hours, it can be seen that the corrosion resistance improved more than three times, in the case of the radiator coated with the rust inhibitor of Example 1 for a long time Chlorine spray test shows that hydrogen embrittlement does not occur at all and can be used safely for a long time.

Claims (6)

An anti-corrosive composition comprising zinc, aluminum, titan tetrabutanolate, solvent naphtha, and an inorganic binder,
The total weight of the rust inhibitor composition is 30 to 60% by weight of zinc, 1 to 10% by weight of aluminum, 10 to 20% by weight of titan tetrabutanolate, 5 to 10% by weight of solvent naphtha, and 5 to 5% of inorganic binder. Including 30% by weight,
The inorganic binder is at least two selected from the group consisting of titan tetrakis (2-ethylhexanolate), poly titan tetrabutanolate, naphtha, trimesoxyvinylsilane and ethylhexanol,
The rust preventive composition is characterized in that for the radiator. delete delete delete (a) a pretreatment step including a short treatment or a phosphate coating treatment after degreasing treatment of the radiator material;
(b) coating the anti-corrosive agent comprising the anti-corrosive composition of claim 1 on the surface of the pre-treated radiator material;
(c) a drying step of heating the surface coated with the rust inhibitor;
(d) a curing step of heating the dried surface; And
(e) a rust preventive coating method comprising a cooling step of cooling the cured surface. A radiator coated with the rust inhibitor composition of claim 1.

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