KR101344561B1 - Sus/al multi coating composition - Google Patents

Abstract

The present invention relates to a stainless steel / aluminum coating composition and a method for preventing corrosion of steel materials using the same. More specifically, the present invention relates to a coating composition for coating aluminum and stainless steel in order to prevent corrosion of the steel materials.

Description

SUS / AL Multi Coating Composition {SUS / AL Multi Coating Composition}

The present invention relates to a stainless steel / aluminum (SUS / AL) coating composition and a method for preventing steel site using the same. More specifically, the present invention relates to a coating composition for coating stainless steel & aluminum on steel in order to prevent corrosion of the steel.

Steel is exposed to the risk of corrosion. In order to prevent corrosion of such steel materials, zinc hot-dip plating has been conventionally performed. Zinc has a melting point of about 420 ° C., which is inexpensive, highly effective as an anti-corrosive plating of steel, and economical, and therefore demands hot dip plating. The plating step is degreasing washing, pickling, flux treatment, drying, hot dip zinc bath deposition, water cooling, and drying. For example, when plating on rebar, the bath temperature is 460 ± 5 ° C., and the deposition time is about 1 minute, and the zinc adhesion amount is 500 to 1500 g / m 3. Typical galvanizing thickness is 8 ~ 20㎛ in galvanized iron plate and 75 ~ 125㎛ in pipe or structure. It is specified in KS D 8308 "Molten Zinc Plating", D 9521 "Molten Zinc Plating Working Standard", and D 0201 "Molten Zinc Plating Test Method".

However, there are the following problems in the case of the steel structure of the resource facility. The C-type steel member is sealed and combined with roofing plate inside the building, so that a large area is exposed to ammonia gas and corrosion occurs. The C-type steel structure has a longitudinal construction, and gas condensate accumulates inside, making it difficult to prevent iron corrosion in advance. In the process of joining the roofing screw thread through the C-type steel from the outside, the steel protection paint surface is damaged and the steel corrosion occurs, and the corrosion of the roofing screw causes the play to shorten the life of the roofing material. It is difficult to prevent corrosion of steel as the steel paint surface is damaged during many assembly processes during the site steel construction process.

When zinc hot plating is applied to steel structures in recycling facilities, many plating surfaces of steel material transportation, upper and defects are damaged, hot-dip plating cannot be done after steel construction, and the exposed parts of assembly screws cannot be plated. For example, there is a problem in that a building must be disassembled in order to perform maintenance.

While solving the problems of the hot dip galvanizing, it is required to develop a coating composition to prevent corrosion of steel structures such as resources, to maximize the durability of the steel material to maintain the life of the building.

An object of the present invention is to provide an aluminum / stainless steel coating composition for preventing corrosion of the steel in order to maximize the durability of the steel to maintain the life of the building.

In order to achieve the above object, the present invention is a metal pigment comprising aluminum flakes and stainless steel flakes; Synthetic resins comprising epoxy resins and polymers of methylstyrene and phenol; Solvents including alcohol and xylene; And additives comprising quaternary ammonium compounds; And it provides a two-component stainless steel / aluminum coating composition comprising a curing agent.

In one embodiment of the present invention, the metal pigment is characterized in that it comprises 10 to 30% by weight based on the total weight of the subject. The synthetic resin is characterized in that it comprises 20 to 50% by weight based on the total weight of the subject. In one embodiment of the present invention, the epoxy resin is characterized in that the araldite 502. In one embodiment of the invention, the composition is an undercoat composition for coating the steel phase to prevent corrosion of the steel.

In order to achieve the above object, the present invention also comprises a metal pigment comprising aluminum flakes and stainless steel flakes; Synthetic resins comprising epoxy resins and polymers of methylstyrene and phenol; Solvents including alcohol and xylene; And an additive comprising a quaternary ammonium compound; And providing a curing agent comprising a polyamide resin, a plasticizer, a drying accelerator, and a solvent; Mixing the base and the curing agent in a weight ratio of 0.5: 1 to 6.0: 1; And there is provided a method for preventing the nonwoven of the steel material, characterized in that it comprises the step of coating the mixed composition in a 50 to 100um on a steel material.

According to the present invention by coating the aluminum / stainless steel on the steel, it is possible to prevent the corrosion of the steel, it helps to maintain the life of the building to maximize the durability of the steel.

The present invention provides a metal pigment comprising aluminum flakes and stainless steel flakes; Synthetic resins comprising epoxy resins and polymers of methylstyrene and phenol; Solvents including alcohol and xylene; And additives comprising quaternary ammonium compounds; And it provides a two-component stainless steel / aluminum coating composition comprising a curing agent.

The two-component stainless steel / aluminum coating composition of the present invention is mainly for preventing corrosion of steel materials. In particular, the coating composition of the present invention is intended for application to steel structures (H beams, C-type steels) used in recycling facilities. Steel structures used in recycling facilities require large-scale stainless steel coatings to prevent corrosion while maintaining the rigidity of the steel. To this end, the coating composition of the present invention is coated on the steel material about 50 to 100um.

Specifically, after coating the steel material with the stainless steel / aluminum coating composition of the present invention, the ammonia coating in the fluorine resin composition thereon.

In the case of the steel structure of the resource facility, there are the following problems.

-C-type steel member is sealed and combined with roofing plate inside the building, so much area is exposed to ammonia gas and corrosion occurs.

-C-type steel structure has a longitudinal construction, so it is difficult to prevent corrosion of steel in advance due to the condensation of gas inside.

-In the process of joining the roofing material screw through the C-type steel from the outside, the steel protection paint surface is damaged and the steel corrosion occurs. The corrosion of the roofing material leads to shortening of the roofing material, which shortens the life of the roofing material.

-It is difficult to prevent steel corrosion because the steel paint surface is damaged during many assembly processes during the construction of the site steel frame.

In order to prevent corrosion of the steel structure, the following coating process was applied.

(1) Carrying steel materials → (2) Steel processing → (3) Steel surface shortening process → (4) Aluminum & stainless coating (SUS / AL COAT) 1st painting work → (5) Product packaging on-site → (6) On-site steel assembly construction → (7) Aluminum & stainless coating (SUS / AL COAT) 2nd painting work → (8) Ammonia-resistant fluorine resin coating 1st coating → (9) Ammonia-resistant fluorine resin coating 2nd coating → Completion Finishing touch final completion inspection

The stainless steel / aluminum coating composition according to the present invention can be used in steps 4 and 7.

The stainless steel / aluminum coating composition according to the present invention is separated into a main component / curing agent in a two-part form and is preferably used within a predetermined time (preferably within 4 hours) after mixing.

Subjects in the compositions of the present invention include metal pigments comprising aluminum flakes and stainless steel flakes; Synthetic resins comprising epoxy resins and polymers of methylstyrene and phenol; Solvents including alcohol and xylene; And additives including quaternary ammonium compounds.

In the present invention, metal pigments include aluminum flakes and stainless steel flakes. The metal pigment may be used in 10 to 30% by weight based on the total weight of the subject. When the metal pigment is used in less than 10% by weight, the content of aluminum and stainless steel in the total composition is reduced, when used in excess of 30% by weight of the metal pigment is used in excess of the contact force to the steel material of the composition is desired in the present invention The effect cannot be achieved.
In addition, the coating composition of the present invention further comprises an inorganic pigment such as quartz or micro talc in addition to the metal pigment.

In the present invention, the synthetic resin includes an epoxy resin and a polymer of methyl styrene and phenol. The epoxy resin is included in the present composition as an adhesive. In other words, it is used for bonding aluminum flakes, which are metallic pigments, and stainless steel flakes to steel. In one embodiment of the present invention, the epoxy resin is Araldite, preferably Araldite 502. Adalite 502 is a CAS No. Compounds corresponding to 25068-38-6, comprising bisphenol A diglycidyl ether as a component of the epoxy resin. In one embodiment of the invention the polymer of methylstyrene and phenol is CAS No. As a compound corresponding to 68512-30-1, it is contained in this composition as a plasticizer. The synthetic resin may be used in 20 to 50% by weight based on the total weight of the subject. When the synthetic resin is used in less than 20% by weight, the adhesive strength of the composition to the steel material is lowered, if it exceeds 50% by weight, the content of the metal pigment is lowered to achieve the desired effect in the present invention.

In the present invention, the solvent includes alcohol and xylene. As alcohol, both aromatic alcohol and aliphatic alcohol can be used. Preferably, at least one alcohol selected from the group consisting of benzyl alcohol, methanol and isobutanol can be used. As xylene m-xylene can be used. The solvent may be used in 5 to 20% by weight based on the total weight of the subject. Outside the above range, the desired effect cannot be achieved in the present invention.

In the present invention, the additive includes a quaternary ammonium compound, and may further include hydrotreated light distillation. The additive may be used at 0.5 to 5% by weight based on the total weight of the subject. Outside the above range, the desired effect cannot be achieved in the present invention.

In this invention, a hardening | curing agent contains a polyamide resin as a main component, and xylene or alcohol can be used as a solvent. As alcohol, n-butyl alcohol can be used. In addition, the curing agent may further include a plasticizer or a drying accelerator. The main to hardener can be used in a weight ratio of 0.5: 1 to 6.0: 1 mixed. Outside the above range, the desired effect cannot be achieved in the present invention.

The present invention provides a metal pigment comprising aluminum flakes and stainless steel flakes; Synthetic resins comprising epoxy resins and polymers of methylstyrene and phenol; Solvents including alcohol and xylene; And an additive comprising a quaternary ammonium compound; And providing a curing agent comprising a polyamide resin, a plasticizer, a drying accelerator, and a solvent; Mixing the base and the curing agent in a weight ratio of 0.5: 1 to 6.0: 1; And there is provided a method for preventing the nonwoven of the steel material, characterized in that it comprises the step of coating the mixed composition on the steel material in 50 to 100um.

Moreover, after the undercoat, the ammonia coating can be applied to the fluororesin composition thereon, thereby increasing the durability of the steel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Examples>

The coating compositions of the present invention were prepared by conventional methods (high speed mixing in a stirrer, 240 minutes) with the compositions of Table 1 (topic) and Table 2 (curing agent).

Classification matter Product Name Example (Kg) Suzy Araldite 502 EPOXY YD 128 / LER 850 23.8 Phenol, methylstyrenated HiRENOL PL-1000 12.8 solvent BENZYL ALCOHOL - 3.4 METHANOL - 0.3 ISOBUTANOL - 1.6 m-XYLENE - 5.6 additive Quaternary Ammonium Compounds TIXOGEL MP
CLAYTON AF / EASIGEL 1.1 distillates (petroleum), hydrotreated light BYK-A-530 0.1 Pigment ALUMINIUM FLAKE AL-PASTE 0100M SR 4.5 STAINLESS FLAKE SUS316L-PASTE 9 Etc MIN-S-SIL 10
MICROTALC AT1 37.7

matter Name of material Example (Kg) XYLENE - 22 n-Butyl Alcohol - 10 Polyamide resin GOODMIDE # 0930 / POLYAMIDE 77-30 59 Plasticizer Jayflex DIDP 8 Drying accelerator ANKAMINE K-54 (HI-54K) / DMP-30 / EP One

<Experimental Example>

The main agent and the curing agent prepared in the above examples were mixed in a ratio of 5.3: 1 by weight. After 10 minutes of mixing, the coating was spray-coated to have a thickness of about 50 to 100um on the steel.

The physical properties of the mixed composition of the subject and the curing agent were evaluated as in Table 3 below.

Test Items unit Results Test Methods LED ((25 ± 1) ℃) K.U 95 KS M 5000: 2009 Specific gravity ((25 ± 1) ℃) - 1.16 KS M ISO 2811-1: 2012 Nonvolatile matter ((105 ± 2) ℃ × 3h) % 57.7 KS M ISO 3251: 2011 Flowability um 1500 KS M ISO 16862: 2011

The corrosion resistance of the stainless steel / aluminum coated steel material of this invention was evaluated as follows, and it was confirmed that corrosion resistance was favorable.

-Corrosion resistance: The surface of the film was observed over time while depositing the coated steel material in the brine with the salt concentration of 5%, maintaining the temperature of 80 ℃. When left at the temperature of 80 ℃ for more than 50 hours, the coating surface was evaluated to be excellent in corrosion resistance should not corrode.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

Claims (5)

Metallic pigments including aluminum flakes and stainless steel flakes; Inorganic pigments; Synthetic resins comprising epoxy resins and polymers of methylstyrene and phenol; Solvents including alcohol and xylene; And additives comprising quaternary ammonium compounds;
And a curing agent. The two-component stainless steel / aluminum according to claim 1, wherein the metal pigment is contained in an amount of 10 to 30% by weight based on the total weight of the main body, and the synthetic resin is included in an amount of 20 to 50% by weight based on the total weight of the main body. Coating composition. The two-part stainless steel / aluminum coating composition of claim 1, wherein the epoxy resin is Araldite 502. The two-component stainless steel / aluminum coating composition of claim 1, wherein the composition is a primer composition for coating the steel phase to prevent corrosion of the steel. Metallic pigments including aluminum flakes and stainless steel flakes; Inorganic pigments; Synthetic resins comprising epoxy resins and polymers of methylstyrene and phenol; Solvents including alcohol and xylene; And an additive comprising a quaternary ammonium compound;
And providing a curing agent comprising a polyamide resin, a plasticizer, a drying accelerator, and a solvent;
Mixing the base and the curing agent in a weight ratio of 0.5: 1 to 6.0: 1; And
A method for preventing corrosion of the steel material comprising the step of coating the mixed composition to 50 to 100um on the steel material.