KR20040050252A - anti-corrosion coating composition, method of preparing and coating the same - Google Patents

Abstract

It fundamentally prevents metal corrosion, electrolysis, and hydrogen embrittlement to improve durability, as well as easy coloring and excellent adhesion to form a uniform coating on various shaped objects. The present invention relates to a functional coating composition for preventing corrosion and spreading.

The functional coating composition for the prevention of corrosion and corrosion contains insulating phenolic resin (C6H5OH), flame retardant and corrosion resistant silicone resin (Si), iron oxide (FeO), aluminum oxide (AlO2), oxidation At least one selected from titanium (TiO 2), magnesium organic acid (C 18 H 35 O 2) and molybdenum emulsion (MoS 2) may be further contained as an auxiliary raw material.

Description

Functional coating composition to prevent corrosion and spreading, anti-corrosion coating composition, method of preparing and coating the same

The present invention relates to a functional coating composition for preventing corrosion, abrasion and corrosion of metals, and to a method for preparing and coating the composition, and more particularly, to acid resistance, alkali resistance, chemical resistance, heat resistance, abrasion resistance, salt resistance, and the like. Semi-permanent functional coating composition for corrosion and anti-corrosion, which can maintain corrosion resistance, electrolysis and hydrogen embrittlement occurring on metal surface and joints and maintain durability more. It relates to a coating method.

In general, metal materials, due to their properties, are deteriorated and destroyed due to chemical reactions or physical shocks due to the surrounding environment, and intensive corrosion is generated in these areas, thereby deteriorating the durability of the metal itself.

In order to prevent corrosion generated in the metal as described above, it is added to the metal itself to make a chemically stable alloy or to apply a chemically stabilized coating solution to prevent the contact of the material causing the corrosion on the surface of the metal surface treatment Surface treatment techniques are known.

According to the surface treatment technology, various coating liquids are used according to the characteristics of the metal, the use, and the surrounding environment, and mainly nickel (Ni), chromium (Cr), zinc (Zn), and copper (Cu) are used as main components. As the surface treatment method using these, electroplating, hot-dip plating, softening, chemical conversion treatment, organic coating treatment, inorganic and organic mixing treatment methods and the like are widely used.

Therefore, according to the purpose and purpose of the metal, a coating solution suitable for this is selected and the coating method is formed on the surface of the metal by the above coating method to prevent the occurrence of rust and corrosion so as to maintain the durability of the metal itself for a long time. .

However, the plating and coating liquids made of the above-described metal materials may cause full or local corrosion due to atmospheric corrosion, chemical reaction erosion, stress corrosion, etc., and the state gradually spreads in proportion to time, and thus the effect thereof may not be maintained for a long time. Antirust and corrosion effects are not obtained.

In addition, chromium-based (Cr), which is the most widely used material among the conventional coating liquids, has excellent anti-corrosion ability, and thus a relatively high anticorrosive effect can be obtained, but since chromium for rust prevents human body and ecosystem with heavy metals, As the use is gradually restricted, it is urgently needed to develop an environmentally friendly coating material that can prevent corrosion, corrosion and hydrogen embrittlement.

In addition, the above-described conventional coating materials have a limitation in preventing corrosion of the metal because it is very vulnerable to electroplating because the coating layer is conductive when the coating layer is formed on the metal surface.

In general, all materials in nature are made of energy, and the energy (potential) due to self-establishment accumulated in the material can be relatively moved and exchanged. In other words, pure metals tend to oxidize in order to have more stable energy, and thus tend to become relatively ions (degrees of ionization) than other materials. This can be explained by the potential energy difference because each metal has a different degree of ionization.

In redox reactions, electrons are the basis for oxidation and reduction reactions. In the above, the degree of ionization has a property of corroding by obtaining electrons, and a metal having a high ionization tendency is called an anode through a comparative comparison between dissimilar metals, and a metal whose ionization tends not to occur easily. These metals all have inherent potential values, so high potential metals (eg gold, silver, platinum, copper, etc.) and low metals (eg iron, tin, nickel, cadmium) , Chromium, zinc, sodium, magnesium, etc.), the metal of high potential is corroded and the metal of low potential is corroded.

In addition, even in the same type of metal, the potential is formed differently due to nonuniformity of metal components, environmental conditions, stress distribution, etc. As a result, the positive and negative electrodes exist on the surface of the same metal, resulting in a difference in electronegativity. Is oxidized and corroded, and the cathode is corrosion-proof and corrosion progresses.

Electrodeposition according to the degree of ionization is shown in all metal structures, ie, offshore structures, bridges, buried materials, automobiles, machine tools, various plant equipment, home appliances, ships, etc. When the electrons move to produce a phenomenon of erosion, which causes ions to lose electrons and corrosion progresses, so-called electrolysis occurs. Conventional plating and coating surface treatment can not prevent such a phenomenon.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to fundamentally prevent the occurrence of metal corrosion and electrolysis and hydrogen embrittlement to improve durability Of course, it is excellent in adhesion and to provide a functional coating composition for preventing corrosion and spreading, which can easily form a uniform coating even on the workpiece of various shapes, to provide a method for producing and coating the composition.

In order to realize the object of the present invention as described above,

The present invention provides a functional coating composition for preventing corrosion and spreading containing phenolic resin (C 6 H 5 OH) with insulation, flame retardant and corrosion resistant silicone resin (Si), and iron oxide (FeO).

In addition, the method for producing a functional coating composition according to the present invention includes a liquefaction process for liquefying a phenolic resin in a solid state, a raw material mixing process for supplying and mixing raw materials to a liquefied phenolic resin, and a viscosity and component distribution of the mixed raw materials. It provides a method for producing a functional coating composition for preventing corrosion and spreading, including a dispersion process to homogenize the, and a degassing process to remove bubbles or gases contained in the coating liquid.

In addition, the coating method of the functional coating composition according to the present invention, the physical pre-treatment step for delaying the corrosion of the workpiece, the chemical pre-treatment step for preventing the oxidation of the workpiece, and It provides a coating method of coating a functional coating composition, and a coating method of the functional coating composition comprising a heat treatment step of performing a heat treatment on the workpiece to which the functional coating composition is coated.

1 is a process diagram showing an embodiment of a preferred method of manufacturing a functional coating composition for preventing corrosion and corrosion in accordance with the present invention.

Figure 2 is a process chart showing an embodiment of a preferred coating method of the functional coating composition for preventing corrosion and corrosion in accordance with the present invention.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention will be described in more detail.

1 is a process chart showing an embodiment of a preferred method for producing a functional coating composition for corrosion and anti-corrosion according to the present invention, the preferred method for producing a functional coating composition for corrosion and anti-corrosion according to the present invention,

Liquefaction process (S1) for liquefying phenolic resin in solid state, raw material mixing process (S2) for supplying and mixing one or more raw materials to liquefied phenolic resin, and dispersion process for equalizing viscosity and ingredient distribution of mixed raw materials (S3) and a defoaming step (S4) for removing gas or bubbles contained in the coating composition coating.

First, although not shown in the drawings briefly described devices provided in the above process, a predetermined amount of raw material is supplied to a high speed stirrer from a separate raw material tank is mixed and liquefied, the stirrer is connected to the disperser and mixed raw material To disperse in a conventional manner to prepare a coating composition.

Since the structure of the stirrer and the disperser is made of the same or similar structure that is widely used in the art, more detailed description thereof will be omitted.

The above-mentioned liquefaction step (S1) is to supply 30% to 60% by weight of the phenol resin to the stirrer to liquefy the resin to have a particle size of 1 to 1,5 nm. Continuous stirring is performed for approximately 12 hours while applying heat.

In the above liquefaction process (S1), a predetermined diluent may be mixed to make the phenol resin liquefied so as to achieve a smoother liquefaction, and the diluent used at this time may be MIBK (Methyl Iso-butyl Ketone) 17∼. 20 wt%, CA (Cellosolve) 17-20 wt% and Ethanol (Ethyl Alcohol) may be added within the range of 16-20 wt%.

The diluent is to allow the phenol resin to be liquefied while maintaining the optimum concentration, it is preferable to be supplied within the above-mentioned addition amount range, if the phenolic resin to be liquefied becomes too thin or turbid if mixed with a small amount or more than the above range Not desirable

When the liquefaction step (S1) is completed, the raw material mixing step (S2) of stirring and mixing the silicon resin (Si) and iron oxide (FeO) to the base liquid phenol resin.

The silicone resin (Si) may be supplied by mixing in the range of 1 to 30% by weight, iron oxide (FeO) in the range of 8 to 10% by weight, and the silicone resin (Si) promotes fine solidification of waste snow resin. Of course, the acid resistance is increased, and in addition to the change in the strength and ductility of the coating film, the acid resistance and the anti-rusting property are improved, and the iron oxide is given more improved anti-rusting power.

If the silicone resin (Si) is used less than the above range, satisfactory uniformity of the tissue cannot be obtained, and if used excessively, the coating may be too soft.

In the raw material mixing step (S2), a predetermined amount of zinc oxide or colored pigment may be added in addition to the raw materials described above.

The zinc oxide may be mixed in the range of 8 to 10% by weight, and when the zinc oxide is mixed in a predetermined amount, the anticorrosion and rust preventing effects may be further improved.

In the above-described raw material mixing step (S2), the stirring is carried out continuously until the particle size of the stirred raw material becomes 30 µm or less, and the temperature applied to the raw materials mixed in the raw material mixing step (S2) is 60 ° C to 80 ° C. It is made in the range of ℃, when heated to less than the above temperature does not achieve a smooth liquefaction, and if heated above the above temperature range, some of the mixed additive material may be evaporated to lose its inherent properties.

When the raw material mixing step (S2) is completed as described above, a dispersion step (S3) for miniaturizing the mixed raw materials is performed, and this dispersion step (S3) is performed so that the particle size of the mixed raw material is 2 µm or less.

The above-mentioned dispersing step (S3) is performed by a conventional dispersing method by a disperser (not shown), and a predetermined amount of dispersant may be added so that the mixed raw materials can be dispersed in an optimal state.

The dispersant is dependent on the wettability and properties of the solids and is added within the range of 0.5 to 5% by weight to optimize the dispersing action of the mixed raw materials.

In addition, the anti-settling agent may be added to the mixed raw material dispersed by the dispersion process (S3) in the range of 1% by weight, and when the anti-settling agent is added, compatibility may be further increased due to improved storage stability.

When the dispersion process (S3) is completed as described above, degassing step (S4) is performed, this process is a surface defect that may occur when the heat treatment after coating the workpiece to remove the bubbles contained in the coating composition It can prevent, and can improve the coating effect by increasing the adhesion.

The above defoaming step (S4) is carried out by a separate defoamer (not shown), wherein a predetermined antifoaming agent for improving the defoaming effect can be added within the range of 0.5% by weight and the surface roughness is controlled. Any leveling agent, which may be added, may be added.

In the above description, it is described that silicon resin (Si) and iron oxide (FeO) are mixed with the phenol resin liquefied, but is not limited thereto.

One or more auxiliary raw materials may be further mixed by this process by performing an auxiliary raw material mixing step (S2-1) of mixing auxiliary raw materials after the above-described raw material mixing step (S2) or dispersion step (S3) is completed. In the drawing, the auxiliary raw material mixing step (S2-1) described above after the dispersion step (S3) is shown as an example.

The auxiliary raw material mixing process (S2-1) is selected as one or more of the aluminum oxide (AlO2), titanium oxide (TiO2), molybdenum emulsion (MoS2), magnesium organic acid (C18H35O2) as a secondary raw material, and mixed at this time, It can be mixed in the range of 25 to 40% by weight of the aluminum oxide (AlO2), 25 to 40% by weight of titanium oxide (TiO2), 3 to 20% by weight of molybdenum emulsion (MoS2), 3 to 20% by weight of organic acid magnesium (C18H35O2) have.

As described above, when ceramic materials such as aluminum oxide (AlO 2) and titanium oxide (TiO 2) are added, the strength, chemical resistance, and salt resistance of an object to be treated can be further improved. If strength, chemical resistance, salt resistance, etc. cannot be obtained and mixed more than the above range, the functionality of other mixtures may be degraded.

In addition, the molybdenum emulsion (MoS2) is to impart lubricating properties and slidability to the surface of the coating film, the organic magnesium oxide (C18H35O2) is to impart alkali resistance, the above-mentioned molybdenum emulsion (MoS2) content If less is used, the lubrication function and slidability are lowered, and if it is used in excess, the adhesive strength of the composition may be formed unevenly. If the organic acid magnesium (C18H35O2) is used less than the above content, satisfactory alkali resistance may not be obtained. When used in excess of the above range, the adhesion of other materials mixed together can be reduced.

The manufacturing process of the functional coating composition according to the present invention is completed by the above-described manufacturing process, the functional coating composition thus prepared is coated on the metal to be treated by a predetermined coating method, Figure 2 is a functional according to the present invention An embodiment of a preferred coating method of the coating composition is shown.

Referring to the accompanying drawings, the coating method of the functional coating composition according to the present invention includes a physical pretreatment step (P1) for delaying the corrosion of the workpiece, a chemical pretreatment step (P2) for preventing the oxidation of the workpiece and And a coating step (P3) of coating the functional coating composition on the treated material subjected to the pretreatment process, and a heat treatment step (P4) of performing a heat treatment on the treated coating material coated with the functional coating composition.

The physical pretreatment process (P1) is a blast method to give a high pressure to a high-strength fine object to physically hit the metal surface to scrape the oxidized surface to form a pure metal, such a process to compress the stress on the metal surface It will not be easily oxidized and increase the surface area of the workpiece to improve the adhesion by approximately 10 times or more.

When the physical pretreatment step P1 is completed, the chemical pretreatment step P2 is performed on the physically pretreated material.

The chemical pretreatment step (S2) is to use a silica-based material to crosslink the organic and inorganic matters, it is also possible to remove the foreign matter on the metal surface through this process.

When the pretreatment steps are completed, a coating step (P3) for coating the functional coating composition on the workpiece is performed. In this step, a spray method or a rotary fugitive method may be used according to the size of the workpiece.

The above spray method can be used in the case of a workpiece having a relatively large area, the workpiece having a relatively small area, such as bolts, nuts can be coated by a rotational annealing method, and the use and function of the workpiece Therefore, it can be coated with various coating thicknesses.

The processed material coated with the functional coating composition by the above process is heat treated by the heat treatment step (P4), this heat treatment step (P4) can be carried out in a separate heating furnace (not shown in the figure).

The heating furnace may be made of an exchangeable heating furnace to optimize the durability of the coating liquid coated on the workpiece through a temperature gradient over three steps within a range of 100 ° C. to 300 ° C., and the heat treatment process (P4) may be performed. When complete, all processes for coating the functional coating composition are complete.

The test results of the metal test piece coated with the functional coating composition for preventing corrosion and spreading according to the present invention by the above-described process as predetermined test items are shown in Tables 1 and 2 below.

As shown in Table 1, the coating composition for corrosion and corrosion prevention according to the present invention can maintain the optimum surface state by suppressing the occurrence of corrosion and corrosion on the metal surface, especially in ships or offshore where salt resistance is required. It can be seen that when applied to the structure and the like can exhibit the optimal functionality.

And, as shown in Table 2 above, the functional coating composition for preventing corrosion and spreading according to the present invention, since the elution amount of harmful substances is detected very low below the standard value, as well as the side effects of the human body by harmful substances It can be seen that it is an environmentally friendly substance that can contribute to prevention.

In the above, a functional coating composition according to the present invention, a preferred embodiment of the preparation and coating method of the composition, but the present invention is not limited to this, but the claims and the detailed description of the invention and the scope of the accompanying drawings It is possible to carry out modification by branch, and this also belongs to the scope of the present invention.

As described above, according to the functional coating composition for preventing corrosion and spreading according to the present invention, the surface of the workpiece is coated with a predetermined thickness to provide a functional coating having no conductivity, thereby causing corrosion, corrosion and hydrogen embrittlement. In addition, wear resistance, heat resistance, chemical resistance, alkali resistance, salt resistance and the like can be further improved to maintain semi-permanent durability.

In addition, since the functional coating composition for preventing corrosion and spreading according to the present invention does not contain any heavy metal components, it may be harmless to the human body and minimize the occurrence of environmental pollution.

Claims (8)

A functional coating composition for preventing corrosion and spreading containing 30 to 60% by weight of phenol resin (C6H5OH), 1 to 30% by weight of synthetic silicon (Si), and 8 to 10% by weight of iron oxide (FeO). The method according to claim 1, wherein the functional coating composition is selected from aluminum oxide (AlO2), titanium oxide (TiO2), molybdenum emulsion (MoS2), magnesium organic acid (C18H35O2) to further contain as an auxiliary raw material corrosion and Functional coating composition to prevent spreading. The method of claim 2, wherein the auxiliary material is 25 to 40% by weight of aluminum oxide (AlO2), 25 to 40% by weight of titanium oxide (TiO2), 3 to 20% by weight of molybdenum emulsion (MoS2), and 3 to 20% of organic magnesium oxide (C18H35O2). Functional coating composition to prevent corrosion and spreading within 20% by weight. The method of claim 1, wherein the functional coating composition further comprises a diluent, anti-settling agent, dispersant, antifoaming agent as an auxiliary additive, and the diluent is contained in Methyl Iso-butyl Ketone (MIBK), Cellosolve (CA), Ethanol (Ethyl Alcohol). Functional coating composition to prevent corrosion and spreading by selecting more than one. The method according to claim 4, wherein the diluent is 17 to 20% by weight of methyl iso-butyl ketone (MIBK), 17 to 20% by weight of CA (Cellosolve), 16-20% by weight of ethanol (Ethyl Alcohol) and Functional coating composition to prevent spreading. Liquefaction process for liquefying phenolic resin in solid state, raw material mixing process for supplying and mixing raw materials to liquefied phenolic resin, dispersing process for equalizing viscosity and component distribution of mixed raw materials, bubbles or gas contained in coating liquid A method of producing a functional coating composition for preventing corrosion and spreading, including a defoaming step of removing the back. The method of claim 6, wherein the functional coating composition is prepared by mixing one or more of aluminum oxide (AlO 2), titanium oxide (TiO 2), molybdenum emulsion (MoS 2), and magnesium organic acid (C 18 H 35 O 2) as further auxiliary materials. Method for producing a functional coating composition for preventing corrosion and corrosion including a. A physical pretreatment step for delaying the corrosion of the workpiece, a chemical pretreatment step for preventing the oxidation of the workpiece, a coating step for coating a functional coating composition on the processed material, and a functional coating composition. A coating method of a functional coating composition for preventing corrosion and spreading, including a heat treatment step of performing a heat treatment on the coated workpiece.