KR100644448B1 - Inhibiting method for surface rust of steel sheet for shipbuilding - Google Patents

Inhibiting method for surface rust of steel sheet for shipbuilding Download PDF

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KR100644448B1
KR100644448B1 KR1020050036743A KR20050036743A KR100644448B1 KR 100644448 B1 KR100644448 B1 KR 100644448B1 KR 1020050036743 A KR1020050036743 A KR 1020050036743A KR 20050036743 A KR20050036743 A KR 20050036743A KR 100644448 B1 KR100644448 B1 KR 100644448B1
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South Korea
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rust
steel sheet
steel
shipbuilding
grit
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KR1020050036743A
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Korean (ko)
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KR20060114564A (en
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한종만
권택규
윤준태
강태성
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대우조선해양 주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE
    • B09B2101/00—Type of solid waste
    • B09B2101/02—Gases or liquids enclosed in discarded articles, e.g. aerosol cans or cooling systems of refrigerators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/04—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using press rams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B9/00—Presses specially adapted for particular purposes
    • B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
    • B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
    • B30B9/124—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing using a rotatable and axially movable screw
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F1/00—Refuse receptacles; Accessories therefor
    • B65F1/14—Other constructional features; Accessories
    • B65F1/1405—Compressing means incorporated in, or specially adapted for, refuse receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65F—GATHERING OR REMOVAL OF DOMESTIC OR LIKE REFUSE
    • B65F2210/00—Equipment of refuse receptacles
    • B65F2210/162—Pressing means

Abstract

본 발명은 조선용 강판의 표면 녹발생 억제방법에 관한 것이다.The present invention relates to a method for suppressing surface rust generation of shipbuilding steel sheet.

본 발명은 조선용 강판의 표면에 발생된 녹제거를 위해 스틸그릿(Steel grit)을 이용하여 블라스팅하는 단계와, 상기 블라스팅 단계 사용된 스틸그릿을 회수하는 단계와, 상기 스틸그릿이 제거된 강판 표면을 에어블로윙(Air blowing)하는 단계로 이루어지는 조선용 강판의 표면 녹제거 방법에 있어서, 상기 에어블로윙이 완료된 후 pH 변화에 따른 강판의 표면의 부동태 영역을 형성하기 위해 약 10micron 이상의 크기를 갖는 생석회(CaO)를 분말 분사장치로 약 0.1㎎/㎡의 량으로 도포하여 강판 표면의 녹발생을 억제할 수 있도록 하는 것을 특징으로 한다. The present invention comprises the steps of blasting using a steel grit (Steel grit) for the removal of rust generated on the surface of the steel sheet for shipbuilding, recovering the steel grit used in the blasting step, and the steel grit surface is removed In the method of removing the surface rust of the steel sheet for shipbuilding comprising the air blowing step, the quicklime having a size of about 10 micron or more to form a passive region of the surface of the steel sheet according to the pH change after the air blowing is completed ( CaO) is applied in an amount of about 0.1 mg / ㎡ with a powder injector to suppress the occurrence of rust on the surface of the steel sheet.

본 발명은 블라스팅된 조선용 강판(블록)의 표면을 방청 처리하여 부동태 영역을 형성하여 우기철의 높은 습도 및 급격한 온도변에 따른 결로현상 등에 의해 발생되는 녹을 효과적으로 억제할 수 있도록 함으로서 기후나 계절조건에 관계없이 생산 공정에 맞추어 블라스팅작업을 정상적으로 실시할 수 있게 되어 녹발생에 의한 재블라스팅작업을 배제할 수 있어 이에 소요되는 인적/물적손실을 없앨 수 있는 장점이 있다.The present invention is to prevent the rust caused by condensation due to high humidity and rapid temperature change of the rainy season to form a passive area by rust-proofing the surface of the blasted steel plate (block) for climatic or seasonal conditions Regardless of the production process, the blasting work can be performed normally, so that reblasting work due to rust can be eliminated, which has the advantage of eliminating human and material loss.

Description

조선용 강판의 표면 녹발생 억제방법{Inhibiting method for surface rust of steel sheet for shipbuilding}Inhibiting method for surface rust of steel sheet for shipbuilding}

도 1은 본 발명에 의해 강판의 표면에 녹발생이 억제된 상태를 나타낸 사진1 is a photograph showing a state in which rust generation is suppressed on the surface of the steel sheet according to the present invention

도 2는 종래 블라스팅 된 상태에서 강판의 표면에 녹이 발생된 상태를 나타낸 사진Figure 2 is a photograph showing a state in which rust is generated on the surface of the steel sheet in the conventional blasted state

도 3은 일반적인 철의 전위-pH 다이어그램의 형상을 나타낸 그래프3 is a graph showing the shape of the potential-pH diagram of a typical iron

본 발명은 조선용 강판의 표면 녹발생 억제방법에 관한 것이다.The present invention relates to a method for suppressing surface rust generation of shipbuilding steel sheet.

본 발명은 블라스팅된 조선용 강판(블록)의 표면을 방청 처리하여 부동태 영역을 형성할 수 있도록 함으로서 우기철의 높은 습도 및 급격한 온도변에 따른 결로현상 등에 의해 발생되는 녹을 효과적으로 억제할 수 있도록 한 것이다.The present invention is to prevent the rust caused by condensation due to high humidity and rapid temperature change of the ferrous season by forming a passive region by anti-rust treatment of the surface of the blasted shipbuilding steel plate (block).

종래에는 우기철의 높은 습도나 급격한 온도변화에 따른 결로현상 등에 의해 블라스팅 된 조선용 강판 표면에 녹이 쉽게 발생되어 불가피한 공정상의 지연을 초래하고 있으나 이에 대하여 선주/감독관은 녹발생 처리를 위한 재블라스팅을 요구하고 있어 그에 따르는 막대한 인적/물적인 손실이 지속적으로 발생되고 있다.Conventionally, rust is easily generated on the surface of ship's steel sheet blasted by condensation due to high humidity or rapid temperature change of rainy season, which inevitably leads to an inevitable process delay. However, ship owners / supervisors require reblasting for rust treatment. The enormous loss of human and material is consistently occurring.

이에 따라 블라스팅 대기중인 강판의 수도 계속 증가되기 때문에 별도의 녹 발생 억제수단 즉, 제습기 등을 가동하여 녹발생을 억제하려는 노력을 기울이고 있으나 제습기 가동에 따른 효과도 기대 이하로 미흡한 실정이어서 또다른 녹발생 억제수단이 요구되고 있다. Accordingly, as the number of steel sheets waiting to be blasted increases, efforts are made to suppress the occurrence of rust by operating a separate rust suppression means, that is, a dehumidifier, but the effect of the operation of the dehumidifier is also less than expected. A suppression means is required.

본 발명은 블라스팅된 조선용 강판(블록)의 표면을 방청 처리하여 부동태 영역을 형성할 수 있도록 함으로서 우기철의 높은 습도 및 급격한 온도변에 따른 결로현상 등에 의해 발생되는 녹을 효과적으로 억제할 수 있도록 함을 목적으로 한다. An object of the present invention is to prevent rust caused by condensation due to high humidity and rapid temperature change of rainy season by forming a passive region by anti-rust treatment of the surface of the blasted shipbuilding steel plate (block). It is done.

이를 위해 본 발명은 조선용 강판의 표면에 발생된 녹제거를 위해 스틸그릿(Steel grit)을 이용하여 블라스팅하는 단계와, 상기 블라스팅 단계 사용된 스틸그릿을 회수하는 단계와, 상기 스틸그릿이 제거된 강판 표면을 에어블로윙(Air blowing)하는 단계로 이루어지는 조선용 강판의 표면 녹제거 방법에 있어서, 상기 에어블로윙이 완료된 후 pH 변화에 따른 강판의 표면의 부동태 영역을 형성하기 위해 약 10micron 이상의 크기를 갖는 생석회(CaO)를 분말 분사장치로 약 0.1㎎/㎡의 량으로 도포하여 강판 표면의 녹발생을 억제할 수 있도록 하는 단계를 포함하는 것을 특징으로 하는 조선용 강판의 표면 녹발생 억제방법을 제공함으로서 상기 목적을 달성하고자 한다.To this end, the present invention comprises the steps of blasting using a steel grit (Steel grit) to remove the rust generated on the surface of the ship steel sheet, recovering the steel grit used in the blasting step, the steel grit is removed In the surface rust removal method of the steel sheet for shipbuilding comprising the step of air blowing the surface of the steel sheet, having a size of about 10 micron or more to form a passive region of the surface of the steel sheet according to the pH change after the air blowing is completed By providing quick lime (CaO) with a powder spraying device in an amount of about 0.1mg / ㎡ by providing a method for suppressing the surface rust generation of shipbuilding steel sheet comprising the step of suppressing the occurrence of rust on the surface of the steel sheet It is intended to achieve the above object.

본 발명은 조선용 강판의 표면에 발생된 녹제거를 위해 스틸그릿(Steel grit)을 이용하여 블라스팅하는 단계와, 상기 블라스팅 단계 사용된 스틸그릿을 회수하는 단계와, 상기 스틸그릿이 제거된 강판 표면을 에어블로윙(Air blowing)하는 단계로 이루어지는 조선용 강판의 표면 녹제거 방법에 있어서, 상기 에어블로윙이 완료된 후pH 변화에 따른 강판의 표면의 부동태 영역을 형성하기 위해 약 10micron 이상의 크기를 갖는 생석회(CaO)를 분말 분사장치로 약 0.1㎎/㎡의 량으로 도포하여 강판 표면의 녹발생을 억제할 수 있도록 하는 단계를 포함하는 것을 특징으로 한다. The present invention comprises the steps of blasting using a steel grit (Steel grit) for the removal of rust generated on the surface of the steel sheet for shipbuilding, recovering the steel grit used in the blasting step, and the steel grit surface is removed In the method of removing the surface rust of the steel sheet for shipbuilding comprising the air blowing step, the quicklime having a size of about 10 micron or more to form a passive region of the surface of the steel sheet according to the pH change after the air blowing is completed ( It is characterized in that it comprises the step of applying CaO) in an amount of about 0.1 mg / ㎡ with a powder injector to suppress the occurrence of rust on the surface of the steel sheet.

본 발명은 조선용 강판의 녹발생 억제를 위해 표면에 분말 분사장치로 도포된 생석회(CaO)를 통해 강판 표면의 pH 조절하여 그 결과 폭로된 대기조건이 넓어진 부동태 영역에 포함되도록 하는 방청성 확보에 주안점을 두고 있다. The present invention focuses on securing the rust resistance so that the atmospheric conditions of the steel sheet are included in the passivated region by adjusting the pH of the steel sheet surface through quicklime (CaO) coated with a powder spraying device on the surface of the steel sheet for shipbuilding to prevent rust. Leave.

본 발명은 조선용 강판의 표면에 발생된 녹제거를 위해 스틸그릿(Steel grit)을 이용하여 블라스팅하고 상기 블라스팅 후 사용된 스틸그릿을 회수하여 상기 스틸그릿이 제거된 강판 표면을 에어블로윙(Air blowing)하게 되는 일련의 녹제거 공정은 종래와 같이 그대로 유지하고 있다. The present invention is blasted using a steel grit (Steel grit) to remove the rust generated on the surface of the steel sheet for shipbuilding and recovering the steel grit used after the blasting air blowing the surface of the steel sheet removed the steel grit (Air blowing) The rust removal process is maintained as it is.

다만 본 발명은 녹발생이 왕성한 습도가 높은 우기철이나 결로발생 위험이 있는 기후나 계절조건하에 이미 블라스팅된 강판의 녹제거를 위해 재블라스팅하는 일이 없이 즉시 공정에 적용 가능하도록 에어블로윙공정과 동시에 pH 변화에 따른 강판의 표면의 부동태 영역을 형성하기 위해 방청작용이 뛰어난 생석회를 도포시키게 되는 것이다. However, the present invention may be applied at the same time as the air blowing process so that it can be immediately applied to the process without reblasting for rust removal of the already blasted steel sheet under climatic or seasonal conditions where there is a risk of condensation or rainy season with high rust generation. In order to form the passivation region of the surface of the steel sheet according to the change it is to apply the quick lime with excellent anti-rust action.

상기 생석회는 약 10micron 이상의 크기를 갖는 생석회(CaO)를 이용하되, 분말 분사장치로 약 0.1㎎/㎡의 량으로 도포하는 것이 바람직하다. The quicklime is made of quicklime (CaO) having a size of about 10 micron or more, and preferably applied in an amount of about 0.1 mg / m 2 using a powder spraying device.

상기와 같이 생석회를 에어블로윙과 함께 강판의 표면에 도포하게 되면 도 1의 방청성 실험결과(우기철 1시간 노출, Room temp)에서와 같이 녹발생이 없는 깨끗한 강판 표면상태를 유지하게 되며 또한 생석회가 페인트의 안료로도 적용되는 예가 있기 때문에 후속 공정인 도장작업에도 아무런 영향 없이 안심하고 사용할 수 있다. When the quicklime is applied to the surface of the steel sheet together with the air blowing as described above, the surface of the steel sheet is kept clean and free of rust, as shown in the anti-rust test results of FIG. Since there is an example that is also applied as a pigment of it can be used with confidence without any effect on the subsequent painting work.

따라서 본 발명은 습도가 높은 우기철이나 결로발생 위험이 있는 기후나 계절조건에 관계없이 생산 공정에 맞추어 블라스팅작업을 정상적으로 실시할 수 있게 되어 녹발생에 의한 재블라스팅작업을 배제할 수 있어 이에 소요되는 인적/물적손실을 없앨 수 있다.Therefore, the present invention can normally perform the blasting operation according to the production process regardless of the weather or seasonal conditions of high rainy season or the risk of dew condensation can eliminate the re-blasting operation due to rust generation Can eliminate material loss.

이상에서는 본 발명의 바람직한 실시예에 대하여 도시하고 설명하였으나 본 발명은 상기한 실시예에 한정되지 아니하며 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 본 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고 그와 같은 변경은 기재된 청구범위 내에 있게 된다.Although the above has been illustrated and described with respect to the preferred embodiment of the present invention, the present invention is not limited to the above-described embodiment without departing from the gist of the present invention claimed in the claims, having ordinary skill in the art to which the present invention pertains. Anyone can make various modifications as well as such changes are within the scope of the appended claims.

본 발명은 블라스팅된 조선용 강판(블록)의 표면을 방청 처리하여 부동태 영역을 형성하여 우기철의 높은 습도 및 급격한 온도변에 따른 결로현상 등에 의해 발생되는 녹을 효과적으로 억제할 수 있도록 함으로서 기후나 계절조건에 관계없이 생산 공정에 맞추어 블라스팅작업을 정상적으로 실시할 수 있게 되어 녹발생에 의한 재블라스팅작업을 배제할 수 있어 이에 소요되는 인적/물적손실을 없앨 수 있는 장점이 있다.The present invention is to prevent the rust caused by condensation due to high humidity and rapid temperature change of the rainy season to form a passive area by rust-proofing the surface of the blasted steel plate (block) for climatic or seasonal conditions Regardless of the production process, the blasting work can be performed normally, so that reblasting work due to rust can be eliminated, which has the advantage of eliminating human and material loss.

Claims (1)

조선용 강판의 표면에 발생된 녹제거를 위해 스틸그릿(Steel grit)을 이용하여 블라스팅하는 단계와, 상기 블라스팅 단계 사용된 스틸그릿을 회수하는 단계와, 상기 스틸그릿이 제거된 강판 표면을 에어블로윙(Air blowing)하는 단계로 이루어지는 조선용 강판의 표면 녹제거 방법에 있어서, 상기 에어블로윙이 완료된 후 pH 변화에 따른 강판의 표면의 부동태 영역을 형성하기 위해 10micron 이상의 크기를 갖는 생석회(CaO)를 분말 분사장치로 0.1㎎/㎡의 량으로 도포하여 강판 표면의 녹발생을 억제할 수 있도록 하는 단계를 포함하는 것을 특징으로 하는 조선용 강판의 표면 녹발생 억제방법.Blasting using steel grit to remove rust generated on the surface of shipbuilding steel plate, recovering the steel grit used in the blasting step, and air blowing the surface of the steel grit from which the steel grit is removed. In the method of surface rust removal of shipbuilding steel sheet comprising the step of (Air blowing), after the air blowing is completed to form a quicklime (CaO) having a size of 10 micron or more to form a passive region of the surface of the steel sheet according to the pH change The method of inhibiting the surface rust generation of shipbuilding steel sheet comprising the step of applying to the amount of 0.1mg / ㎡ with an injection device to suppress the occurrence of rust on the surface of the steel sheet.
KR1020050036743A 2005-05-02 2005-05-02 Inhibiting method for surface rust of steel sheet for shipbuilding KR100644448B1 (en)

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