KR100428838B1 - Manufacturing method of anti-finger treatment steel sheets - Google Patents
Manufacturing method of anti-finger treatment steel sheets Download PDFInfo
- Publication number
- KR100428838B1 KR100428838B1 KR10-1999-0058586A KR19990058586A KR100428838B1 KR 100428838 B1 KR100428838 B1 KR 100428838B1 KR 19990058586 A KR19990058586 A KR 19990058586A KR 100428838 B1 KR100428838 B1 KR 100428838B1
- Authority
- KR
- South Korea
- Prior art keywords
- phosphate
- coating
- steel sheet
- treatment
- steel plate
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/32—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer
- C23C28/322—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one pure metallic layer only coatings of metal elements only
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/24—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/30—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer
- C23C28/34—Coatings combining at least one metallic layer and at least one inorganic non-metallic layer including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/36—Phosphatising
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
본 발명은 가전용으로 사용되고 있는 강판에 통상의 방법으로 아연도금을 한 후 이에 인산염처리와 크로메이트처리를 순차적으로 실시하여 가공성이 우수한 인산염피막을 형성함으로써 손바닥이 접촉될 때 발생되는 지문이나 자욱을 방지할 수 있게한 내지문 처리된 강판의 제조방법에 관한 것으로,The present invention is galvanized to a steel plate that is used for home appliances in the usual way and then phosphate treatment and chromate treatment in order to form a phosphate coating having excellent processability to prevent fingerprints and rashes when palms are in contact It relates to a method of manufacturing a steel plate subjected to the fingerprinting,
즉, 아연도금층이 형성된 강판을 모재로 그 아연도금층 위에 인산염피막을 약 600~1,000mg/㎡정도 부착시키고, 다음에 크롬 6가의 농도가 1~10 포인트, 유리산 농도(Free Acid)가 0.5~3 범위의 용액으로 된 크로메이트처리를 실시하며, 이에 내지문수지를 코팅처리 함으로써, 내지문 강판의 가공성을 향상시킴과 아울러 내식성을 높일 수 있으며, 또한 내식성의 향상으로 인하여 환경을 오염시키는 물질의 사용을 현저히 줄일 수 있게된 것이다.In other words, using a steel plate with a zinc plated layer as a base material, the phosphate coating is deposited on the zinc plated layer at about 600 to 1,000 mg / m 2, and then the chromium hexavalent concentration is 1 to 10 points and the free acid concentration is 0.5 to It is possible to improve the processability of the anti-finger steel sheet and to increase the corrosion resistance by coating the anti-fingerprint by coating the anti-fingerprint with the solution of 3 ranges, and also to prevent the use of substances polluting the environment due to the improved corrosion resistance. Significantly reduced.
Description
본 발명은 내지문 처리된 강판의 제조방법, 보다 상세하게는 가전용으로 사용되고 있는 강판에 통상의 방법으로 아연도금을 한 후 이에 인산염처리와 크로메이트처리를 순차적으로 실시하여 가공성이 우수한 인산염피막을 형성함으로써 손바닥이 접촉될 때 발생되는 지문이나 자욱을 방지할 수 있게한 내지문 처리된 강판의 제조방법에 관한 것이다.The present invention is to produce a phosphate coating having excellent processability by galvanizing the steel sheet used in the anti-fingerprinted steel plate, more specifically, the steel plate used for home appliances in the usual way and then phosphate treatment and chromate treatment sequentially The present invention relates to a method for manufacturing a fingerprinted steel sheet, which makes it possible to prevent fingerprints or smudges generated when palms are in contact.
일반적으로, 사람의 손이 강판에 접촉될 경우에도 지문이나 흔적이 생겨나지 않는 소위 내(耐)지문(指紋) 강판은 수지층 및 크로메이트 처리에 의해 내식성이 뛰어나고 외관이 미려하기 때문에 컴퓨터의 내외장재, 음향기기 및 세탁기의 외장패널 등 일반 가전용으로 그 수요량이 대단히 많다.In general, the so-called anti-fingerprint steel plate, which does not generate fingerprints or traces even when a human hand is in contact with the steel plate, has excellent corrosion resistance and beautiful appearance by the resin layer and chromate treatment. Demand for general household appliances such as exterior panels of appliances and washing machines is very high.
이러한 내지문 강판의 제조과정은 아연도금-크로메이트처리-내지문 수지 코팅 등의 순으로 이루어지며, 상기 아연은 표준 전극전위가 -760mV로 상당히 비하기 때문에 크로메이트 용액에서 용이하게 치환반응을 일으켜 아연이 용해되고 그 대신 크롬이 피막을 형성하게 된다.The manufacturing process of the anti-fingerprint steel sheet is made in the order of zinc plating-chromate treatment-fingerprint resin coating, and since zinc has a fairly high standard electrode potential of -760 mV, zinc easily reacts in the chromate solution, causing zinc It dissolves and chromium forms instead.
크롬 부착량은 크로메이트 용액중의 Cr농도에 의해 결정되기 때문에 부착량을 증가시키기 위하여는 용액중 Cr농도를 올려주면 된다.Since the amount of chromium deposition is determined by the Cr concentration in the chromate solution, to increase the adhesion amount, the Cr concentration in the solution may be increased.
그러나 이 강판을 제품화 하기 위하여 가공할 경우에는 아연도금층이 무르기 때문에 다이와의 마찰에 의해 표면에 눌린흔적을 남기게 되었고, 수요가들은 이런 현상을 흑색화(흑화)라 하여 사용을 꺼려하는 경향이 있다.However, when the steel sheet is processed to be commercialized, the galvanized layer is soft, which leaves traces pressed on the surface by friction with the die, and customers tend to be reluctant to use this phenomenon as blackening (blackening).
또한 수지층만으로는 아연도금층의 내식성을 충분하게 확보하지 못하기 때문에 아연도금층 위에 크로메이트 처리를 실시하여 크롬을 5~100mg/㎡까지 부착시키고 있으나, 크롬이 인체에 유해하다는 이유로 세계적인 환경규제 대상으로 되었기 때문에 조속한 시일내에 크롬을 대체할 수 있는 물질의 개발이 시급한 상황이다.In addition, since the resin layer alone does not sufficiently secure the corrosion resistance of the zinc plated layer, chromate treatment is performed on the zinc plated layer to attach chromium to 5 to 100 mg / m 2, but since chromium is harmful to humans, it has been subject to global environmental regulations. There is an urgent need to develop materials that can replace chromium as soon as possible.
본 발명은 상기와 같은 종래의 내지문 강판을 제조할 때 발생되는 문제점을 해결하기 위하여 안출된 것으로, 그 목적은 강판에 형성된 아연도금층 위에 인산염처리와 크로메이트처리를 순착적으로 실시하여 내지문 강판의 가공성을 향상시킬 수 있는 내지문 처리된 강판의 제조방법을 제공하는 것이다.The present invention has been made in order to solve the problems caused when manufacturing the conventional anti-finger steel sheet, the object is to perform a phosphate treatment and chromate treatment on the zinc plated layer formed on the steel sheet in order to It is to provide a method for producing a anti-fingerprinted steel sheet capable of improving workability.
이러한 목적을 달성하기 위한 본 발명은, 아연도금층이 형성된 강판을 모재로 그 아연도금층 위에 인산염피막을 약 600~1,000mg/㎡정도 부착시키고, 다음에크롬 6가의 농도가 1~10 포인트, 유리산 농도(Free Acid)가 0.5~3 범위의 용액으로 된 크로메이트처리를 실시하며, 이에 내지문수지를 코팅처리 함으로써, 내지문 강판의 가공성을 향상시킴과 아울러 내식성을 높일 수 있으며, 또한 내식성의 향상으로 인하여 환경을 오염시키는 물질의 사용을 현저히 줄일 수 있게됨을 특징으로 한다.In order to achieve the above object, the present invention uses a steel plate having a galvanized layer formed thereon, and a phosphate coating is deposited on the zinc plated layer at about 600 to 1,000 mg / m 2, followed by chromium hexavalent concentration of 1 to 10 points, and free acid concentration. (Free Acid) is chromate treatment with a solution in the range of 0.5 to 3, by coating the anti-fingerprint resin to improve the processability of the anti-fingerprint steel sheet, and also increase the corrosion resistance, and also improves the corrosion resistance It is characterized in that it is possible to significantly reduce the use of substances that pollute.
도 1a는 종래의 내지문 강판을 편면마찰 시험을 한 후 강판표면의 마찰부위를 관찰한 것이고, 도 1b는 본 발명의 방법으로 제조된 내지문 강판을 편면마찰 시험을 한 후 강판표면의 마찰부 표면을 각각 나타낸 사진이다.Figure 1a is a friction region of the steel plate surface after the one-sided friction test of the conventional anti-finger steel sheet, Figure 1b is a friction portion of the steel plate surface after the one-sided friction test of the steel plate prepared by the method of the present invention The photograph shows the surface.
이하, 본 발명의 내지문 처리된 강판의 제조방법을 첨부도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, a method for manufacturing a rubbing treated steel sheet of the present invention will be described in detail with reference to the accompanying drawings.
통상의 방법으로 아연도금층이 형성된 강판을 모재로 그 아연도금층 위에 인산염피막을 600~1000mg/㎡ 부착시키고 다음에 크로메이트처리를 실시하여 내지문 강판을 제조하게 된다.Using a steel sheet having a galvanized layer formed by a conventional method, a phosphate coating is deposited on the zinc plated layer at 600 to 1000 mg / m 2, followed by chromate treatment to prepare a steel plate.
상기 아연도금층 위에 부착되는 인산염피막의 주요성분은 Zn3(PO4)2·4H2O로 되어 도료와 밀찰력이 뛰어나기 때문에 아연도금강판의 도장 하지용으로 사용되며 인산염피막 자체가 어느 정도 내식성도 가지고 있다.The main component of the phosphate film attached on the zinc plated layer is Zn 3 (PO 4 ) 2 · 4H 2 O, which is used for coating of zinc-coated steel sheet because it has excellent paint and sealing power. I also have
또한 인산염피막은 금속과 달리 비정질이고 피막의 경도도 약 100(Hv)으로 아연도금층의 경도50(Hv)보다 크기 때문에 가공작업이 유리하며, 다이에 강판을 마찰시킬 때 아연도금층은 다이에 밀리면서 도금층이 압력에 눌려 은백색의 광택을 띠기 때문에 그렇지 않은 부위와 심한 색상 차이를 나타내지만, 인산염피막은 마찰부위에 눌린자국을 남지기 않는다.In addition, the phosphate coating is amorphous, unlike the metal, and the hardness of the coating is about 100 (Hv), which is greater than the hardness of the galvanized layer (Hv), which is advantageous to the machining process. Since the plated layer has a silvery white luster under pressure, it shows a severe color difference with the non-plated layer, but the phosphate film does not leave a pressed mark on the frictional portion.
따라서 아연도금층 위에 인산염처리를 하면 우수한 가공성을 확보할 수 있으며, 반면에 피막 두께가 1,000mg/㎡이상일 경우에는 스폿 용접이 잘 않되는 경향이 있다.Therefore, if the phosphate treatment on the galvanized layer can ensure excellent processability, on the other hand, when the film thickness is more than 1,000mg / ㎡ there is a tendency that spot welding is not good.
즉, 통상의 인산염처리 조건으로 인산염처리를 하면 피막 두께의 부착량이 약 1,500~2,500mg/㎡을 나타내어 스폿 용접성을 해치기 때문에 인산염처리를 한 후에는 크로메이트처리를 실시하여 인산염부착량이 600~1,000mg/㎡ 정도 되도록 인산염피막을 용해시켜 주어야 한다.That is, if the phosphate treatment is carried out under normal phosphate treatment conditions, the coating thickness of the film shows about 1,500 to 2,500 mg / m 2, which impairs the spot weldability. The phosphate coating should be dissolved to about 2m2.
상기 크로메이트처리의 주된 목적은 인산염피막의 위에 크롬을 부착시키는 것이 아니고, 인산염피막을 용해시켜 인산염 부착량을 일정하게 유지되도록 하기 위한 것이다.The main purpose of the chromate treatment is not to attach chromium on the phosphate coating, but to dissolve the phosphate coating so that the phosphate adhesion amount is kept constant.
이때 크로메이트 용액의 조건은 용액중 크롬 6가 농도를 1~10 포인트, 유리산 농도(Free Acid)는 0.5~3으로 하는 것이 바람직하다.At this time, it is preferable that the chromate solution has a chromium hexavalent concentration in the solution of 1 to 10 points and a free acid concentration of 0.5 to 3.
도 1a는 종래의 내지문 강판을 편면마찰 시험을 한 후 강판표면의 마찰부위를 관찰한 것이고, 도 1b는 본 발명의 방법으로 제조된 내지문 강판의 마찰부 표면을 나타낸 것으로, 상기 비교예에서 확인되는 바와 같이 본 발명의 방법에 의해 제조된 인산염피막이 존재하는 강판의 경우에는 다이와의 마찰에 의해 눌린 자국이 거의 없음을 알 수 있다.Figure 1a is to observe the friction portion of the surface of the steel sheet after the one-sided friction test of the conventional anti-finger steel sheet, Figure 1b shows the surface of the friction portion of the anti-fingerprint steel sheet produced by the method of the present invention, in the comparative example As can be seen, in the case of the steel sheet in which the phosphate film produced by the method of the present invention is present, it can be seen that there are almost no pressed marks by friction with the die.
상기와 같이 본 발명의 인산염 부착량의 범위를 600~1,000mg/㎡으로 한정하는 이유는 600mg/㎡이하 이면 목표로 하는 가공성(내 흑화성)을 확보할 수 없고 1000mg/㎡이상 이면 스폿 용접성이 나빠지기 때문이다.The reason for limiting the range of phosphate adhesion amount of the present invention to 600 to 1,000 mg / m 2 as described above is that if the target workability (blackening resistance) is less than 600 mg / m 2, the spot weldability is higher than 1000 mg / m 2. Because it falls out.
또한 크로메이트처리시 크롬 6가가 1포인트 이하 이고 유리산 농도가 0.5이하 이면 인산염 부착량을 1,000mg/㎡이하로 유지할 수 없고, 크롬 6가가 10포인트 이상 이고 유리산 농도가 3이상이면 인산염 부착량이 600mg/㎡이하로 되기 때문이다.In the case of chromate treatment, if chromium hexavalent is 1 point or less and free acid concentration is 0.5 or less, the phosphate adhesion amount cannot be maintained below 1,000 mg / m2, and if chromium hexavalent is 10 points or more and free acid concentration is 3 or more, 600 mg / This is because it is less than 2 m 2.
한편, 실험을 통해 본 발명의 효과를 알아보기 위하여 다음 실시예와 같이 부착량이 20g/㎡인 아연도금강판을 사용하여 아래와 같이 인산염처리와 크로메이트처리 등 내지문처리를 실시하였고, 이후 내식성과 가공성 및 용접성을 각각 평가하였다.On the other hand, in order to find out the effect of the present invention through the experiment using a galvanized steel sheet having an adhesion amount of 20g / ㎡ as shown in the following example, the phosphate treatment and chromate treatment, etc. were carried out as follows, after the corrosion resistance and workability and Weldability was evaluated respectively.
내식성은 염수분무 시험기(5% NaCl, 35℃)를 이용하여 72시간 이내에 백청이 5% 이하로 발생한 경우는 양호한 것으로 판정하였고, 가공성은 시편을 길이 300mm, 폭 40mm로 절단하여 편면마찰 시험기를 이용하여 다이의 가압력 600Kg, 인발속도는 분당 1,000mm로 하여 인발한 후 표면에 형성된 눌린부위와 정상부의 백색도(△L)를 각각 측정하여 그 차이가 3이상 이면 불량한 것으로 평가하였으며, 용접성은 용접전류 4.0KA에서 9.5KA까지 부여하면서 5.0~8.5KA에서 용접이 이루어지면 양호한 것으로 하였고 탄흔은 육안으로 관찰하여 평가하였다.Corrosion resistance was judged to be good when white rust occurred less than 5% within 72 hours using a salt spray tester (5% NaCl, 35 ℃), and workability was cut by cutting the specimen into 300mm length and 40mm width. Then, the pressing force of die was 600Kg and the drawing speed was 1,000mm per minute, and the whiteness (△ L) of the pressed part and the top part formed on the surface was measured, respectively, and the difference was more than 3, and the weldability was poor. It was considered good if welding was performed at 5.0 ~ 8.5KA while giving KA to 9.5KA, and the scar was evaluated by visual observation.
실시예; Example ;
1) 인산염처리조건1) Phosphate Treatment Condition
전체공정 : 표면조정(1)→인산염처리(2)→수세(3)→건조(4)Overall process: surface adjustment (1) → phosphate treatment (2) → water washing (3) → drying (4)
(1)표면조정 : 농도 PN-Z 3g/l, 온도 40℃, 처리시간 2초(현장조건)(1) Surface adjustment: concentration PN-Z 3g / l, temperature 40 ℃, treatment time 2 seconds (site conditions)
(2)인삼염처리 : 농도 PB3312JM 60g/l, 온도 55℃, 처리시간 8초(현장조 건)(2) Ginseng salt treatment: concentration PB3312JM 60g / l, temperature 55 ℃, treatment time 8 seconds (on-site condition)
(3)수세 및 (4)건조(3) washing and (4) drying
2) 크로메이트처리조건2) Chromate Treatment Condition
ZM3357JM : 1~50g/l(Cr6+0.5~12포인트에 해당)ZM3357JM: 1-50g / l (corresponds to Cr 6+ 0.5-12 points)
온도 40℃Temperature 40 ℃
처리시간 : 10초Processing time: 10 seconds
유리산 농도(FA) : 0.3~4Free Acid Concentration (FA): 0.3 ~ 4
3)내지문처리3) Fingerprint processing
바 코터(Bar Coater) #3을 사용하여 내지문수지를 약 700~1,200mg/㎡이 되도록 코팅하고 온도가 250℃인 오븐에서 12초 동안 건조.Use Bar Coater # 3 to coat the fingerprint to approximately 700-1,200 mg / m2 and dry in an oven at 250 ° C for 12 seconds.
상기 인산염부착량은 전기도금공장에서 실시하는 조건으로 실시하여 부착량이 2000mg/㎡이 되도록 하였으며 크로메이트처리는 크롬 6가 농도와 유리산 농도를 변화시킴으로서 인산염피막의 부착량을 조절하였다.The phosphate deposition amount was carried out under the conditions carried out in the electroplating plant so that the adhesion amount was 2000 mg / m 2, and the chromate treatment regulated the adhesion amount of the phosphate film by changing the chromium hexavalent concentration and the free acid concentration.
표1은 상기의 조건으로 실시한 내지문 강판과 인산염처리를 실시하지 않고 크로메이트처리한 기존 내지문강판에 대하여 내식성, 용접성 및 가공성을 평가한 결과이다.Table 1 shows the results of evaluating the corrosion resistance, weldability and workability of the anti-fingerprint steel sheet subjected to the above conditions and the conventional anti-fingerprint steel sheet subjected to chromate treatment without phosphate treatment.
(내식성 및 용접성 : 양호 ←◎ O □×→불량)(Corrosion resistance and weldability: good ← ◎ O □ × → defect)
상기 표의 제 1번 항목은 종래예를 나타낸 것으로 용접성과 내식성은 우수하나 가공성 즉, 강판을 성형한 후 다이와 접촉되었던 부위와 정상부위의 백색도 차이가 10이상으로 대단히 커서 흑화현상이 심하게 발생하였음을 알 수 있고, 비교에에서도 크롬농도 및 유리산소가 높은 제 2, 3항목의 경우에는 인산염피막이 전부 용해되었기 때문에 용접성과 내식성은 양호하나 가공성이 열세한 것으로 나타났다.The first item of the above table shows a conventional example, but it shows excellent weldability and corrosion resistance, but the workability, that is, the blackness phenomenon occurred severely because the difference in the whiteness of the part and the top part contacted with the die after forming the steel sheet was more than 10. In the comparison, the second and third items having high chromium concentration and free oxygen showed that all of the phosphate coating was dissolved, so that the weldability and corrosion resistance were good, but the workability was inferior.
반대로 비교예 제 4, 5항목의 경우는 크로메이트 용액의 크롬농도와 유리산 농도가 낮아 인산염피막이 용해되지 않았기 때문에 인산염피막이 600~1,000mg/㎡으로 부착되어 우수한 가공성은 물론 내식성과 용접성에서도 양호한 것으로 나타났다.On the contrary, in Comparative Examples 4 and 5, since the chromium solution and free acid concentration of chromate solution were low, the phosphate coating was not dissolved. Therefore, the phosphate coating was attached at 600 to 1,000 mg / m 2, indicating excellent workability as well as corrosion resistance and weldability. .
따라서 내지문강판의 가공성은 물론 용접성과 내식성을 동시에 양호한 수준으로 만들어 주기 위하여는 인산염처리 후 적정한 크롬농와 유리산 농도 영역에서 크로메이트처리를 실시할 필요가 있다.Therefore, in order to make the weldability and corrosion resistance of the anti-finger steel sheet at the same time good level, it is necessary to perform chromate treatment in the appropriate chromium concentration and free acid concentration range after phosphate treatment.
이와 같은 본 발명의 내지문 처리된 강판의 제조방법은 강판에 형성된 아연도금층 위에 인산염처리와 크로메이트처리를 순착적으로 실시하여 내지문 강판의 가공성을 향상시킴과 아울러 내식성을 높일 수 있는 효과가 있으며, 상기 내식성의 향상으로 인하여 환경을 오염시키는 물질의 사용을 현저히 줄일 수 있는 등의 장점도 있다.Such a method of manufacturing the anti-fingerprinted steel sheet of the present invention by performing a phosphate treatment and chromate treatment on the zinc plated layer formed on the steel sheet in order to improve the workability of the anti-fingerprint steel sheet and to increase the corrosion resistance, Due to the improved corrosion resistance, there is also an advantage such as to significantly reduce the use of substances polluting the environment.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0058586A KR100428838B1 (en) | 1999-12-17 | 1999-12-17 | Manufacturing method of anti-finger treatment steel sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0058586A KR100428838B1 (en) | 1999-12-17 | 1999-12-17 | Manufacturing method of anti-finger treatment steel sheets |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20010056911A KR20010056911A (en) | 2001-07-04 |
| KR100428838B1 true KR100428838B1 (en) | 2004-04-28 |
Family
ID=19626593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-1999-0058586A KR100428838B1 (en) | 1999-12-17 | 1999-12-17 | Manufacturing method of anti-finger treatment steel sheets |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100428838B1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101322063B1 (en) * | 2012-05-07 | 2013-10-28 | 주식회사 포스코 | Molybdenum unbased composition, surface treated steel sheet therewith having superior excellent blackening resistance and electro-conductivity |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63130795A (en) * | 1986-11-21 | 1988-06-02 | Kawasaki Steel Corp | Composite chemical conversion coating zn plated steel sheet and its production |
| JPH04311581A (en) * | 1991-04-09 | 1992-11-04 | Sumitomo Metal Ind Ltd | Surface-treated steel sheet having high corrosion resistance |
| KR940000603A (en) * | 1992-06-18 | 1994-01-03 | 김만제 | Chromate treatment solution for galvanized steel with excellent black and corrosion resistance |
-
1999
- 1999-12-17 KR KR10-1999-0058586A patent/KR100428838B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63130795A (en) * | 1986-11-21 | 1988-06-02 | Kawasaki Steel Corp | Composite chemical conversion coating zn plated steel sheet and its production |
| JPH04311581A (en) * | 1991-04-09 | 1992-11-04 | Sumitomo Metal Ind Ltd | Surface-treated steel sheet having high corrosion resistance |
| KR940000603A (en) * | 1992-06-18 | 1994-01-03 | 김만제 | Chromate treatment solution for galvanized steel with excellent black and corrosion resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010056911A (en) | 2001-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100378878B1 (en) | Zn-Mg electroplated metal sheet and fabrication process therefor | |
| US20080274363A1 (en) | Passivating of tin, zinc and steel surfaces | |
| US5114799A (en) | Material for roofing and facing | |
| CN1158407C (en) | Chrome-free passivating solution for protecting galvanized layer and its coating method | |
| KR100428838B1 (en) | Manufacturing method of anti-finger treatment steel sheets | |
| KR20210069457A (en) | Bonded steel sheet having excellent corrosion resistance and method for manufacturing thereof | |
| KR100326653B1 (en) | Manufacturing method of hot-dip galvanized steel sheet containing chromate treatment with excellent black resistance and whiteness | |
| CN112813425A (en) | Trivalent chromium passivation solution for zinc plating and preparation method and application thereof | |
| KR100498093B1 (en) | A blackening treatment steel sheet with good surface appearence, and a blackening treatment solution | |
| KR100296687B1 (en) | Chromate solution with superior corrosion/blackening resistance for hot dipped galvanized steel sheet | |
| KR102300792B1 (en) | Black color plated sheet and manufacturing method thereof | |
| CN114481261B (en) | Copper-tin alloy surface treatment liquid and preparation method and application thereof | |
| KR100925617B1 (en) | Preparing method of painted steel sheet of galvannealed iron with excellent anti-blister property | |
| JP3335261B2 (en) | Method for producing blackened zinc-based plated steel sheet | |
| JPS627890A (en) | Zinc or zinc alloy plated steel sheet having superior corrosion resistance, paintability and workability | |
| JPH045753B2 (en) | ||
| CN106756947A (en) | A kind of preparation method of Chrome-free bright blue passivation film | |
| TWI279452B (en) | A Zn-plated steel sheet with an inorganic and organic composite plated layer excellent in corrosion resistance | |
| KR20030004815A (en) | Manufacturing method for anti-fingerprint steel plate | |
| JPH0273980A (en) | Double-plated steel sheet having high corrosion resistance | |
| TWI248986B (en) | A Zn-plated steel sheet with an inorganic and organic composite plated layer excellent in corrosion resistance | |
| Nair et al. | Process Features and Corrosion Performance in Phosphating as Related to Additive Functionality | |
| JPH04246193A (en) | Galvanized metal material excellent in resistance to heat and corrosion | |
| JPH0432576A (en) | Solution for zinc phosphate chemical conversion treatment | |
| KR100507574B1 (en) | A method for anti-finger steel sheets having superior whiteness |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20080401 Year of fee payment: 5 |
|
| LAPS | Lapse due to unpaid annual fee |