KR810002103B1 - Pre-treeting method for galvanizing - Google Patents
Pre-treeting method for galvanizing Download PDFInfo
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- KR810002103B1 KR810002103B1 KR1019800002849A KR800002849A KR810002103B1 KR 810002103 B1 KR810002103 B1 KR 810002103B1 KR 1019800002849 A KR1019800002849 A KR 1019800002849A KR 800002849 A KR800002849 A KR 800002849A KR 810002103 B1 KR810002103 B1 KR 810002103B1
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- oil
- plating
- treatment
- bath
- washing
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- 238000005246 galvanizing Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000005406 washing Methods 0.000 claims abstract description 9
- 239000011701 zinc Substances 0.000 claims abstract description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002253 acid Substances 0.000 claims abstract description 7
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910001296 Malleable iron Inorganic materials 0.000 claims abstract description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 4
- 239000011707 mineral Substances 0.000 claims abstract description 4
- 238000007747 plating Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 23
- 238000010306 acid treatment Methods 0.000 claims description 6
- 238000005422 blasting Methods 0.000 claims description 6
- 238000002203 pretreatment Methods 0.000 claims description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 2
- 230000003449 preventive effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims 4
- 238000007598 dipping method Methods 0.000 abstract 1
- 230000004927 fusion Effects 0.000 abstract 1
- 239000010913 used oil Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000007547 defect Effects 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 150000002505 iron Chemical class 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
- C23C2/026—Deposition of sublayers, e.g. adhesion layers or pre-applied alloying elements or corrosion protection
-
- 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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/06—Zinc or cadmium or alloys based thereon
-
- 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
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
제1도는 본 발명 방법에 의한 전처리 과정의 예시도.1 is an illustration of a pretreatment process according to the method of the present invention.
제2도는 본 발명의 오일 침지용 바렐(Barrel) 사시도.2 is a perspective view of an oil immersing barrel of the present invention.
본 발명은 가단 주철제의 관 이음쇠(Pipe Fitting) 및 철제품을 연속적으로 아연도금함에 있어 그 전처리 방법으로써 종전에 사용 실시하여 오던 재래식 복잡한 전처리 과정을 생략하고 도금소재를 오일 탱크에 통과시켜 오일 피복처리를 실시함으로써 표면을 이상적으로 청정(靑淨)시키는 전처리 방법에 관한 것이다.In the present invention, in the continuous galvanizing of pipe fittings and iron products made of malleable cast iron, as a pretreatment method, the conventional complex pretreatment process that has been conventionally used is omitted, and the plating material is passed through an oil tank to coat the oil. The present invention relates to a pretreatment method for ideally cleaning the surface.
종전부터 사용되어 온 용융 아연 도금시의 전처리 방법은 숏트 브라스팅(Shot Blasting)작업, 산처리 및 수세작업, 후락스(Flux) 처리작업 및 건조작업을 연속시켜 피도금체의 표면을 청정하게 한 후 도금조에 송입하여 도금을 실시하게 되는 것이다.The pre-treatment method of hot dip galvanizing which has been used in the past has been performed by performing shot blasting, acid treatment and flushing, flux treatment and drying to clean the surface of the plated body. After that, the plating is applied to the plating bath.
그러나 종래의 전처리 과정에 있어서는 불충분한 수세로 인하여 도금소재의 표면에 산과 염기성 철염인 스맛트(Smut)가 잔존하며 이로 인하여 아연 도금용욕은 드로스(Dross) 발생을 증가시켜 결국은 도금의 불량을 유발케하는 경우가 많았다.However, in the conventional pretreatment process, due to insufficient washing, acid and basic iron salt Smut remain on the surface of the plating material. As a result, the zinc plating bath increases dross generation and eventually causes plating defects. It was often triggered.
따라서 전처리 과정에서 완전 무결한 수세를 행하여야 도금의 밀착성을 얻을 수 있으나 완전 무결한 수세를 할려면 상당한 회수의 수세와 수세 방법에 특별한 고려를 하여야 하며 수세용수 또한 다량의 소비량이 요구되어지고 장시간 수세로 인하여 눈에 보이지 않는 산화피막이 도금소재 표면에 다시 형성됨으로 결국 도금의 밀착성이 불량요인이 되고, 많은 시간이 소요되어야 하는 결점이 있었다.Therefore, the adhesion of plating can be obtained only by performing a perfect clean water in the pretreatment process, but in order to perform a perfect clean water, special consideration should be given to a considerable number of washing and washing methods. Due to the invisible oxide film is formed again on the surface of the plating material, the adhesion of the plating eventually becomes a bad factor, there was a defect that should take a lot of time.
본 발명의 목적은 상기한 바와 같은 제결점을 제거하고 도금소재를 우선 숏트 브라스팅 및 산처리 작업을 한다 수세, 후락스, 건조등의 작업공정을 완전 생략하고 그대로 오일처리를 함으로써 도금소재의 표면 청정을 완전 무결하게 하고 표면에 생기는 피막을 제거시키므로써 종전의 전처리 방법에 비하여 작업공수를 절감하고, 수세로 인한 많은 량의 폐수를 처리하는 과정이 불필요하고, 화공약품의 사용을 최대한으로 억제하며, 작업소요 시간을 단축하고, 작업소요 면적을 적게 함으로써 생산원가의 절감시킴에 있다.The object of the present invention is to remove the defects as described above, and the plating material is first shot blasting and acid treatment work. Omitting the work process such as water washing, flax, drying, etc. completely, the surface of the plating material by oil treatment as it is By completely cleanliness and eliminating the film on the surface, it saves labor compared to the previous pretreatment method, eliminates the process of treating a large amount of waste water by washing with water, and suppresses the use of chemicals to the maximum. In addition, the cost of production is reduced by reducing the work time and reducing the work area.
이하 본 발명의 상세한 내용을 구체적으로 설명하면, 도금소재인 가단주철재 관 이음 및 철제품을 연속적으로 아연 도금함에 있어 그 전처리 과정으로써 소재표면에 부착되어 있는 불순물을 물리적인 방법에의 하여 제거되는 숏트 브라스팅 작업을 한뒤 핀홀(Pin Hole)등, 숏트 브라스팅 작업으로서 제거되지 않은채 잔존하는 미세 불순물을 화학적 방법에 의한 산처리 작업을 수행하고 산처리가 끝난 소재를 지체없이 바렐(Barrel)에 넣어 오일조(槽)에 2-3분간 침지시키면 소재표면에 있던 산액(酸液)과, 오일의 응집력에 의하여 소재 표면에서 염산 용액을 밀어내어 오일이 확산 도포되며 오일이 치환도포 되었을 때 인양하여 원심분리기에 의하여 여분 오일을 제거한다.Hereinafter, the present invention will be described in detail. In the galvanizing of malleable cast iron pipe fittings and iron products, which are plating materials, the impurities attached to the surface of the material are removed by physical methods as a pretreatment process. After performing the short blasting operation, perform the acid treatment work by chemical method on the remaining fine impurities which are not removed as a short blasting work such as pin hole, and the acid-treated material is applied to the barrel without delay. After immersing in an oil bath for 2-3 minutes, the acid solution on the surface of the material and the hydrochloric acid solution are pushed out from the surface of the material by the cohesive force of the oil, and the oil is diffused and applied. Remove excess oil by centrifuge.
여기에 사용하는 오일 조건은 점도가 낮고 유동성이 양호하여 비등점이 높고(B. P. 500℃ 이상) 물과의 치환성이 양호하며, Zn 욕과 화학 반응을 일으키지 않는 광물성 계통의 방청유중 P-DVAS, WD-40P, P-DBH 및 PSV(H) 등을 사용하며, 오일의온도를 10℃-30℃에서 처리하는 것이 이상적이다.The oil conditions used here are low viscosity, good fluidity, high boiling point (BP 500 ℃ or higher), good substitution with water, and P-DVAS, WD in mineral-based rust preventive oil that does not cause chemical reaction with Zn bath. -40P, P-DBH and PSV (H) are used, and it is ideal to treat the oil temperature at 10 ℃ -30 ℃.
본 발명 방법에 의하여 오일 피복 처리된 도금 소재는 그 표면에 산과 염기성 철염인 스맛트(Smut)가 잔존하지 않고 산화철이 다시 유발하지 않으며 깨끗하게 청정되어 있어서 도금의 밀착성이 매우 양호하게 된다.The plating material subjected to oil coating by the method of the present invention has no acid and basic iron salt Smut on its surface, does not cause iron oxide again, and is cleanly cleaned, so that the adhesion of plating is very good.
또한 본 발명은 종래 전처리 과정에서 수세로 인한 막대한 수량의 절약과 산처리액 및 수세용수의 공해 폐수처리가 필요없으므로 무공해 작업이 가능하며 후락스(Flux) 처리를 하지 않으므로 방카C유를 절감할 수 있고 후락스가 도금로 내에 들어감으로 해서 발생하는 스라그(Slag)(
본 발명에 의하면 경우에 따라서는 산처리 과정을 완전 생략하여 숏트 브라스팅 한 소재를 그대로 오일처리 하더라도 도금소재의 표면을 완전무결하게 청정할 수 있어 밀착성이 우수한 도금을 실시할 수 있다.According to the present invention, even if the acid treatment process is omitted completely, even if the short-blasted material is oil-treated as it is, the surface of the plating material can be completely clean and plating can be performed with excellent adhesion.
이하 도면에 의거하여 본 발명의 실시예를 설명한다.Embodiments of the present invention will be described below with reference to the drawings.
주조후 열처리 공정을 거쳐 나온 가단 주철제관 이음소(Malleable Pipe Fitting) 및 철제품을 용융 아연 도금함에 있어 도금 소재인 관 이음쇠 및 철제품을 공지의 숏트 브라스팅기(1)에서 물리적인 방법에 의해 소재표면에 부착되어 있는 불순물을 제거하고 이 도금소재를 바렐(2)에 넣은 다음 산세탱크(3) 내에서 산세한 다음 10℃-30℃의 온도를 갖는 광물성 계통의 방청유의 오일 탱크(4) 내부에 도금소재가 든 바렐을 2-3분간 침지시켜 소재 표면에 있던 산액과 오일이 치환 도포되었을 때 바렐을 인양하여 원심분리기(5)에 의하여 여분오일을 제거한 다음 도금소재를 지그(Jig)에 꽂아서 용융아연 도금로에 송입되어 도금을 실시한다.In hot dip galvanizing malleable cast iron pipe fittings and iron products which have been subjected to heat treatment after casting, pipe fittings and iron products, which are plating materials, are formed by physical methods in a known short blasting machine (1). After removing impurities adhering to the surface, the plating material is placed in the barrel (2), then pickled in the pickling tank (3), and then inside the oil tank (4) of the mineral-based antirust oil having a temperature of 10 ° C-30 ° C. Immerse the barrel containing the plating material for 2-3 minutes and lift the barrel when acid and oil were applied on the surface of the material to remove excess oil by centrifugal separator (5), and then put the plating material into the jig. It is fed to the hot dip galvanizing furnace and plated.
이때 용융 아연 도금로의 온도와 도금시간은 제품의 종류에 따라 적절히 조절한다.At this time, the temperature of the hot dip galvanizing and the plating time is appropriately adjusted according to the type of product.
또한 사용하는 오일의 순도에 따라서는 도금로의 온도와 도금시간이 약간씩 달라진다.In addition, depending on the purity of the oil used, the temperature of the plating furnace and the plating time vary slightly.
전술한 바와같이 본 발명은 도금소재를 오일처리를 함으로써 도금소재의 표면을 완전무결하게 청정할 수 있으며 수세 및 후락스, 건조등의 공정을 생략할 수 있는 잇점이 있으므로 매우 경제성이 높고 효율이 높은 아연 도금을 얻을 수 있는 발명인 것이다.As described above, the present invention can completely clean the surface of the plated material by oil treatment of the plated material, and it is very economical and has high efficiency because the process of washing, flushing and drying can be omitted. It is an invention in which zinc plating can be obtained.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019800002849A KR810002103B1 (en) | 1980-07-18 | 1980-07-18 | Pre-treeting method for galvanizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019800002849A KR810002103B1 (en) | 1980-07-18 | 1980-07-18 | Pre-treeting method for galvanizing |
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| Publication Number | Publication Date |
|---|---|
| KR810002103B1 true KR810002103B1 (en) | 1981-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019800002849A KR810002103B1 (en) | 1980-07-18 | 1980-07-18 | Pre-treeting method for galvanizing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101225765B1 (en) * | 2010-09-29 | 2013-01-23 | 현대제철 주식회사 | Method and apparatus for preventing rust on steel sheet |
-
1980
- 1980-07-18 KR KR1019800002849A patent/KR810002103B1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101225765B1 (en) * | 2010-09-29 | 2013-01-23 | 현대제철 주식회사 | Method and apparatus for preventing rust on steel sheet |
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