KR100391564B1 - Powder derust agent - Google Patents

Powder derust agent Download PDF

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KR100391564B1
KR100391564B1 KR10-1999-0061626A KR19990061626A KR100391564B1 KR 100391564 B1 KR100391564 B1 KR 100391564B1 KR 19990061626 A KR19990061626 A KR 19990061626A KR 100391564 B1 KR100391564 B1 KR 100391564B1
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South Korea
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powder
rust
agent
rust preventive
imidazole
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KR10-1999-0061626A
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Korean (ko)
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KR20010057536A (en
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김민균
김병억
이재율
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재단법인 포항산업과학연구원
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Priority to KR10-1999-0061626A priority Critical patent/KR100391564B1/en
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/03Powdery paints
    • C09D5/033Powdery paints characterised by the additives
    • C09D5/038Anticorrosion agents

Abstract

본 발명은 제철소를 포함한 철강관련 산업에서 철강제품의 부식방지를 목적으로 사용되고 있는 각종 방청유를 대신하여 사용할 수 있는 새로운 조성물의 분말 방청제에 관한 것으로,The present invention relates to a powder rust preventive agent of a novel composition that can be used in place of various rust preventive oils used for the purpose of preventing corrosion of steel products in steel-related industries including steel mills,

냉연공장에서 완제품을 포장하여 후공정 또는 수요가에게 이송하는 도중에 부식을 방지하기 위한 분말 방청제로서, 디사이클로헥실아민나이트라이트 40∼50wt.%, 이미다졸 30∼40wt.%, 헥사메틸렌테트라아민 5∼13wt.%, 에틸렌디아민테트라아세틱엑시드 5∼13wt.%를 포함하여 구성됨을 특징으로 하여, 후처리 공정의 단순화 및 충분한 방청효과를 얻을 수 있게 된다.As a powder anticorrosive agent to prevent corrosion during packaging or transporting finished products in cold rolling mill to post process or demand, dicyclohexylamine nitrite 40-50wt.%, Imidazole 30-40wt.%, Hexamethylenetetraamine 5 It is characterized in that it comprises ~ 13wt.%, 5 ~ 13wt.% Of ethylenediaminetetraacetic acid, it is possible to simplify the post-treatment process and to obtain a sufficient antirust effect.

Description

분말 방청제 {Powder derust agent}Powder Antirust Agent {Powder derust agent}

본 발명은 제철소를 포함한 철강관련 산업에서 철강제품의 부식방지를 목적으로 사용되고 있는 각종 방청유를 대신하여 사용할 수 있는 새로운 조성물의 분말 방청제에 관한 것이다.The present invention relates to a powder rust preventive agent of a new composition that can be used in place of various rust preventive oils used for the purpose of preventing corrosion of steel products in the steel-related industries including steel mills.

일반적으로 체철소내의 냉연공장에서는 완성된 냉연제품을 수요가에게 운송 하거나 후공정인 도금공장으로 이송하는 과정에서의 녹 발생을 방지하기 위한 목적으로 디 옥틸 세바케이트(DOS 0IL)나 하이드로 카본계 방청유를 강판표면에 도포한 후 포장지로 포장하여 운송하고 있다.In general, cold rolling mills in ironworks are dioctyl sebacate (DOS 0IL) or hydrocarbon-based rust-preventing oils for the purpose of preventing the occurrence of rust during transportation of finished cold-rolled products to demand or transfer to the plating plant. Is coated on the surface of steel sheet and then packed in a wrapping paper for transportation.

이와 같이 방청유가 도포된 냉연강판이 수요가나 후공정인 도금, 도장처리공정에 도착하게 되면, 방청용 포장지를 벗겨내어 처리해야 함은 물론, 후공정을 진행하기 전에 강판 표면에 도포되어 있는 방청유를 제거하기 위하여 유기용제나 알카리 탈지액을 사용한 탈지공정을 반드시 거쳐야 하기 때문에 많은 처리비용을 부담해야 하는 문제점이 있다. 또한, 경우에 따라서는 탈지불량에 의한 결함이 발생하는 등 문제점이 심각하였다.In this way, when the cold rolled steel sheet coated with rust preventive oil arrives at the demand or after plating or painting process, the rust preventive wrapping paper must be peeled off and treated, and the rust preventive oil coated on the surface of the steel sheet before the post process is performed. In order to remove, a degreasing process using an organic solvent or an alkaline degreasing solution must be carried out, and thus, a large treatment cost is required. In addition, in some cases, the problem was serious, such as a defect caused by poor degreasing.

따라서 본 발명은 기존의 방청유가 갖고 있는 여러 가지 문제점들을 해결하기 위하여 안출된 것으로서, 종래의 방청유를 사용할 경우에 발생되는 문제점들을 근원적으로 해결할 수 있도록 냉연강판의 표면에 일시적인 방청층을 형성하여 냉연강판의 부식을 방지해 줄 뿐만 아니라, 금속이온들의 영향에 의한 녹 발생을 억제할 수 있도록 킬레이트제를 첨가하여 방청효과를 증대시키도록 한 새로운 조성의 분말 방청제를 제공함에 그 목적이 있다.Therefore, the present invention was devised to solve various problems of the conventional rust-preventing oil, and formed a temporary rust-preventing layer on the surface of the cold-rolled steel sheet to fundamentally solve the problems caused by using the conventional rust-preventing oil. The purpose of the present invention is not only to prevent corrosion, but also to provide a powder rust inhibitor with a new composition to increase the rust prevention effect by adding a chelating agent to suppress rust generation caused by the influence of metal ions.

이와 같은 목적을 갖는 본 발명의 분말 방청제는, 냉연공장에서 완제품을 포장하여 후공정 또는 수요가에게 이송하는 도중에 부식을 방지하기 위한 분말 방청제로서, 디사이클로헥실아민나이트라이트 40∼50wt.%, 이미다졸 30∼40wt.%, 헥사메틸렌테트라아민 5∼13wt.%, 에틸렌디아민테트라아세틱엑시드 5∼13wt.%를 포함하여 구성됨을 특징으로 한다.The powder rust preventive agent of the present invention having such a purpose is a powder rust preventive agent for preventing corrosion during the packaging of the finished product in a cold rolling mill and transported to a post process or a demand, and is 40 to 50 wt.% Of dicyclohexylamine nitrite. It is characterized by including 30 to 40wt.% Of dazole, 5 to 13wt.% Of hexamethylenetetraamine, and 5 to 13wt.% Of ethylenediaminetetraacetic acid.

이하에서는 본 발명의 분말 청정제의 조성 및 각 조성원소의 역할에 대하여 상세히 설명한다.Hereinafter, the composition of the powder cleaning agent of the present invention and the role of each component will be described in detail.

본 발명은 냉연공장의 정정라인 완제품 제조공정에서 종래의 방청유를 대체하여 사용할 수 있도록 하여 운송과정에서의 부식발생을 방지해 줌은 물론, 수요가나 후공정에서의 탈지공정을 생략하도록 하여 많은 경제적 이익을 창출할 수 있도록 한 분말 방청제에 관한 것으로, 대기중에 방청효과를 나타내는 디사이클로헥실아민나이트라이트 40∼50wt.% 와 이미다졸 30∼40wt.% 와, 헥사메틸렌테트라아민 5∼13wt.%, 그리고 에틸렌디아민테트라아세틱엑시드 5∼13wt.%를 포함하여 구성된다.The present invention can be used to replace the conventional rust preventive oil in the finished product manufacturing process of the correction line of the cold rolling mill to prevent the occurrence of corrosion in the transportation process, as well as to eliminate the degreasing process in the demand or post-processing many economic benefits Powder anti-corrosive agent which is capable of producing oxidizing agent, 40-50 wt.% Of dicyclohexylamine nitrite, 30-40 wt.% Of imidazole, 5-13 wt.% Of hexamethylenetetraamine, 5 to 13 wt.% Of ethylenediaminetetraacetic acid.

이때, 상기 디사이클로헥실아민나이트라이트는 기화성이 매우 우수한 방청제로서 강판 표면에 물리화학적으로 흡착되어 순간적인 방청피막을 형성하여 방청작용의 핵심적 역할을 수행한다.At this time, the dicyclohexylamine nitrite is a very excellent vaporization of the rust preventive physicochemically adsorbed on the surface of the steel sheet to form an instant rust preventive film plays a key role of the rust preventive action.

상기 이미다졸 및 헥사메틸렌테트라아민은 강판표면에서 양전하를 띠어 강판 표면의 부식과정에서 금속철이 2가 또는 3가 철로 변화되면서 용출되어 나오는 음전하의 전자들과 전기적인 인력에 의해 상호결합하여 전자들의 용출을 방지시켜 주어 금속철이 산화되는 것을 방지시켜 주는 역할을 수행한다.The imidazole and hexamethylenetetraamine are positively charged at the surface of the steel plate, and the metals are eluted by the electromagnetism of the negatively charged electrons that are eluted as the metal iron is changed to divalent or trivalent iron during the corrosion of the steel plate surface and elutes the electrons. It serves to prevent the oxidation of metal iron by preventing.

또한, 상기 에틸렌디아민테트라아세틱엑시드는 금속철의 부식을 촉진시켜 주는 칼슘, 마그네슘 등과 같은 기타 금속이온들과 반응하여 안정한 킬레이트 화합물을 형성하여 이들의 영향을 근원적으로 봉쇄시켜주어 부식을 방지시켜 주는 역할을 수행한다.In addition, the ethylenediaminetetraacetic acid reacts with other metal ions such as calcium and magnesium to promote the corrosion of metal iron to form a stable chelate compound to fundamentally block their effects to prevent corrosion Play a role.

이상과 같이 구성된 본 발명의 작용을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above are as follows.

본 발명은 먼저 디사이클로헥실아민나이트라이트와 이미다졸이 강판표면과의 상호작용에 의해 방청층을 형성하여 부식을 방지해 줌은 물론, 에틸렌디아민테트라아세틱엑시드의 킬레이트효과에 의해 금속이온들의 작용에 의한 부식발생원인을 제거함으로써 방청효과를 나타내게 된다.In the present invention, dicyclohexylamine nitrite and imidazole form a rust-preventing layer by interaction with the steel plate surface to prevent corrosion, as well as the action of metal ions by the chelate effect of ethylenediaminetetraacetic acid. By removing the cause of corrosion caused by the exhibits the anti-rust effect.

상기 조성원소 중에서 디사이클로헥실아민나이트라이트 및 이미다졸이 각각 하한 임계값인 40wt.% 및 30wt.% 이하로 함유되면, 충분한 방청효과를 지속적으로 나타내지 못하고 일정시간 후부터는 표면에 부식이 발생하여 원하는 방청효과를 얻을 수 없고, 각각 상한 임계값인 50wt.% 및 40wt.% 이상으로 함유되면, 방청효과는 뛰어나다고 할 지라도 분말 방청제가 도포된 코일의 중앙부위에 약한 얼룩자국이 남는 문제가 발생되기 때문에 위와 같이 조성범위를 선정한 것이다.When the dicyclohexylamine nitrite and imidazole are contained below the lower limit of 40wt.% And 30wt.%, The constituent elements do not continuously exhibit sufficient rust preventing effects and corrosion occurs on the surface after a certain time. If the effect is not obtained and contained in the upper limit of 50 wt.% And 40 wt.% Or more, respectively, even though the anti-rust effect is excellent, there is a problem that weak stain marks remain in the center portion of the coil to which the powder rust inhibitor is applied. The composition range is selected as above.

또한, 상기 헥사메틸렌테트라아민 및 에틸렌디아민테트라아세틱엑시드는 각각 5wt.% 이하로 함유되면, 첨가목적을 달성할 수 없고, 13wt.% 이상으로 함유되면, 상대적으로 상기 디사이클로헥실아민나이트라이트 및 이미다졸의 함유량이 줄게 되어 원하는 방청효과를 얻을 수 없기 때문에 5wt.% ∼ 13wt.% 범위로 함유되는 것이 바람직하다.In addition, when the hexamethylenetetraamine and ethylenediaminetetraacetic acid are each contained in an amount of 5 wt.% Or less, the purpose of addition cannot be achieved, and when contained in 13 wt.% Or more, the dicyclohexylamine nitrite and Since the content of imidazole is reduced and a desired antirust effect cannot be obtained, it is preferable to be contained in the range of 5wt.%-13wt.%.

이하에서는 구체적인 실시예를 통하여 본 발명의 분말 방청제에서 조성범위를 한정한 이유 및 방청효과에 대하여 설명한다.Hereinafter, the reason for limiting the composition range in the powder rust inhibitor of the present invention and the rust prevention effect through specific examples will be described.

각각 조성범위를 달리하는 분말 청정제를 열분사장치들을 이용하여 강판 표면에 도포한 후, 코일을 감아 야드에 2주 이상 방치한 다음 강판 표면에서 발생되는 부식의 발생여부 및 발생정도를 면밀히 관찰하여 방청성능을 평가하였다.Apply powder cleaners with different composition ranges to the surface of the steel sheet using thermal spraying devices, and then coil the coils and leave them in the yard for at least two weeks, then closely observe the occurrence and extent of corrosion occurring on the surface of the steel sheet. The performance was evaluated.

대기중에서의 방청효과를 나타내는 디사이클로헥실아민나이트라이트의 농도를 35wt.%, 이미다졸의 농도를 25wt.%, 헥사메틸렌테트라아민 8wt.%, 그리고 에틸렌디아민테트라아세틱엑시드 8wt.%를 포함하여 구성한 분말 방청제(비교예 1)를 냉연공장의 생산공정 중에서 라인 속도를 200MPM으로 하면서 분말분사장치를 이용하여 강판 표면에 분사하여 도포를 완료한 다음 2주후에 코일을 풀어 부식발생여부를 확인하였다. 그 결과 코일 전구간의 가장자리부위를 중심으로 많은 녹이 발생하였다. 따라서 상기 디사이클로헥실아민나이트라이트 및 이미다졸의 농도가 너무 낮은경우에는 충분한 방청효과를 지속적으로 나타내지 못하고 일정시간 후부터는 표면에 부식이 발생하는 것을 확인할 수 있다.The concentration of dicyclohexylamine nitrite showing the rust-preventing effect in the air was 35 wt.%, The imidazole concentration was 25 wt.%, The hexamethylenetetraamine 8wt.%, And the ethylenediaminetetraacetic acid 8wt.%. The powdered rust inhibitor (Comparative Example 1) was sprayed onto the surface of the steel sheet using a powder spraying device with a line speed of 200 MPM in the production process of the cold rolling mill to complete the coating, and then, after 2 weeks, the coil was released to check for corrosion. As a result, a lot of rust occurred around the edges of the coils. Therefore, when the concentrations of the dicyclohexylamine nitrite and imidazole are too low, it may be confirmed that corrosion does not occur on the surface after a certain time without showing sufficient antirust effect.

다음에는 대기중에서의 방청효과를 나타내는 디사이클로헥실아민나이트라이트의 농도를 45wt.%, 이미다졸의 농도를 35wt.%, 헥사메틸렌테트라아민 10wt.%, 그리고 에틸렌디아민테트라아세틱엑시드 10wt.%로 구성한 분말 방청제(발명예)를 냉연공장의 생산공정 중에서 라인 속도를 200MPM으로 하면서 분말분사장치를 이용하여 강판 표면에 분사하여 도포를 완료한 다음 2주후에 코일을 풀어 부식발생여부를 확인하였다. 그 결과 코일의 전구간에 걸쳐 전혀 녹이 발생하지 않았으며, 깨끗한 표면 상태를 유지하였다. 따라서 상기 본 발명예의 경우 매우 만족스러운 방청효과를 얻을 수 있음을 확인할 수 있다.Next, the concentration of dicyclohexylamine nitrite, which shows the rust-preventing effect in the air, was 45 wt.%, The imidazole concentration was 35 wt.%, The hexamethylenetetraamine 10 wt.%, And the ethylenediamine tetraacetic acid 10 wt.%. The powdered rust inhibitor (invention example) was sprayed onto the surface of the steel sheet using a powder spraying device while the line speed was 200MPM in the production process of the cold rolling mill to complete the coating, and then, after 2 weeks, the coil was released to check for corrosion. As a result, no rust occurred at all stages of the coil, and the surface was kept clean. Therefore, in the case of the present invention it can be seen that a very satisfactory rust prevention effect can be obtained.

다음에는 대기중에서의 방청효과를 나타내는 디사이클로헥실아민나이트라이트의 농도를 52wt.%, 이미다졸의 농도를 42wt.%, 헥사메틸렌테트라아민 3wt.%, 그리고 에틸렌디아민테트라아세틱엑시드 3wt.% 로 구성한 분말 방청제(비교예 2)를 냉연공장의 생산공정 중에서 라인 속도를 200MPM으로 하면서 분말분사장치를 이용하여 강판 표면에 분사하여 도포를 완료한 다음 2주후에 코일을 풀어 부식발생여부를 확인하였다. 그 결과 코일의 전구간에 걸쳐 전혀 녹은 발생하지 않았으나, 코일의 중앙부위에 약한 얼룩자욱이 남는 문제점이 있었다.Next, the concentration of dicyclohexylamine nitrite in the air was 52 wt.%, The imidazole concentration was 42 wt.%, The hexamethylene tetraamine 3 wt.%, And the ethylenediamine tetraacetic acid 3 wt.%. The powdered rust inhibitor (Comparative Example 2) was sprayed onto the surface of the steel sheet using a powder spraying device with a line speed of 200 MPM in the production process of the cold rolling mill to complete the coating, and then, after 2 weeks, the coil was released to check for corrosion. As a result, the melting did not occur at all throughout the coil, but there was a problem in that a weak stain remains in the central portion of the coil.

이상에서 상세히 설명한 바와 같이 본 발명의 분말 방청제를 사용하면, 디사이클로헥실아민나이트라이트와 이미다졸의 상호작용으로 강판의 표면에 방청층을형성하여 부식을 방지해 줌은 물론, 방청유가 도포된 냉연강판이 후공정인 도금, 도장처리공정에 도착하게 되면 방청용 포장지를 벗겨내어 처리해야 하고, 방청유를 제거하기 위하여 유기용제나 알카리 탈지액을 사용한 탈지공정을 반드시 거쳐야 하기 때문에 많은 처리비용을 부담해야 하는 문제점들을 물에 용해가 용이한 조성물들을 사용하여 물에 냉연강판을 통과시키는 것만으로도 방청제의 제거가 가능하도록 함으로써, 후처리 공정의 단순화 및 충분한 방청효과를 얻을 수 있게 된다.As described in detail above, when the powder rust preventive agent of the present invention is used, an antirust layer is formed on the surface of the steel sheet by the interaction of dicyclohexylamine nitrite and imidazole to prevent corrosion, as well as cold rolled oil coated with rust preventive oil. When the steel sheet arrives at the plating and painting process, which is a post process, it is necessary to peel off the anti-rust wrapping paper and process it.In order to remove the rust-preventing oil, a degreasing process using an organic solvent or an alkali degreasing solution must be carried out. Problems to be solved by allowing the removal of the rust preventive agent by simply passing the cold rolled steel sheet through the water using compositions that are easily soluble in water, thereby simplifying the aftertreatment process and obtaining sufficient rust preventive effects.

Claims (1)

냉연공장에서 완제품을 포장하여 후공정 또는 수요가에게 이송하는 도중에 부식을 방지하기 위한 분말 방청제로서,As a powder rust preventive to prevent corrosion during packing and transporting finished products in cold rolling mill to post process or demand 디사이클로헥실아민나이트라이트 40∼50wt.%, 이미다졸 30∼40wt.%, 헥사메틸렌테트라아민 5∼13wt.%, 에틸렌디아민테트라아세틱엑시드 5∼13wt.%를 포함하여 구성됨을 특징으로 하는 분말 방청제.Powder comprising dicyclohexylamine nitrite 40-50wt.%, Imidazole 30-40wt.%, Hexamethylenetetraamine 5-13wt.%, Ethylenediaminetetraacetic acid 5-13wt.% Antirust agent.
KR10-1999-0061626A 1999-12-24 1999-12-24 Powder derust agent KR100391564B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0733766A (en) * 1993-07-23 1995-02-03 Shikoku Chem Corp Diamino-s-triazine compound having imidazole ring and method for preventing copper from rusting using the same compound
KR19980083297A (en) * 1997-05-13 1998-12-05 서월석 Electrolytic clean antifouling composition
JPH1192975A (en) * 1997-09-17 1999-04-06 Nippon Soda Co Ltd Rust preventing chemical and rust preventing method
KR20010048092A (en) * 1999-11-25 2001-06-15 이구택 Powdered rust inhibitor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0733766A (en) * 1993-07-23 1995-02-03 Shikoku Chem Corp Diamino-s-triazine compound having imidazole ring and method for preventing copper from rusting using the same compound
KR19980083297A (en) * 1997-05-13 1998-12-05 서월석 Electrolytic clean antifouling composition
JPH1192975A (en) * 1997-09-17 1999-04-06 Nippon Soda Co Ltd Rust preventing chemical and rust preventing method
KR20010048092A (en) * 1999-11-25 2001-06-15 이구택 Powdered rust inhibitor

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