JPS6323271B2 - - Google Patents
Info
- Publication number
- JPS6323271B2 JPS6323271B2 JP1459882A JP1459882A JPS6323271B2 JP S6323271 B2 JPS6323271 B2 JP S6323271B2 JP 1459882 A JP1459882 A JP 1459882A JP 1459882 A JP1459882 A JP 1459882A JP S6323271 B2 JPS6323271 B2 JP S6323271B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum
- steel sheet
- coating
- powder
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 32
- 229910052782 aluminium Inorganic materials 0.000 claims description 28
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 239000000843 powder Substances 0.000 claims description 13
- 229910000838 Al alloy Inorganic materials 0.000 claims description 11
- 238000005096 rolling process Methods 0.000 claims description 11
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 229910007567 Zn-Ni Inorganic materials 0.000 claims description 8
- 229910007614 Zn—Ni Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 238000003303 reheating Methods 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 description 14
- 230000007797 corrosion Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 238000005452 bending Methods 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 241000221535 Pucciniales Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/082—Coating starting from inorganic powder by application of heat or pressure and heat without intermediate formation of a liquid in the layer
- C23C24/085—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
- C23C24/087—Coating with metal alloys or metal elements only
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
本発明はアルミニウムもしくはアルミニウム合
金被覆鋼板の製造方法に係り、特に耐候性とアル
ミニウム被膜密着性がともにすぐれた被覆鋼板の
製造方法に関する。
一般に20μ以上のアルミニウム膜厚を有する粉
末法アルミニウム被覆鋼板はピンホールが極微で
あるため耐食性は全般に良好であるが、大気中に
暴露するとその端面の鋼板露出部が発錆し、暴露
時間の経過とともに鋼板とアルミニウムとの界面
でアンダーフイルムコロージヨン状に腐食が進行
してアルミニウムが剥離する現象がよく知られて
いる。
この問題に対して従来の粉末アルミニウム被覆
鋼板の製造法においては粉末アルミニウムを被覆
するに先立つて脱脂酸洗後の鋼板表面に0.5ｇ／
m2以上のニツケルを被覆する前処理法が提案され
ている。
この方法は前記の如く鋼板表面にニツケルを被
覆し、次に粉末アルミニウムを水の中に分散させ
た懸濁液をロールコート法で鋼板に塗布し約200
℃で乾燥する。その後鋼板の単位幅１cmあたり3t
の荷重で圧延し、さらに450℃で１分間加熱後冷
却し、鋼板の単位幅１cmあたり1.2tの荷重で調圧
するもので、Niの皮膜を0.5ｇ／m2以上とし、ア
ルミニウム被覆層をほぼ20μとすることを特徴と
している。
しかし、この方法には次のような問題点があ
る。すなわち懸濁液を塗布後の乾燥温度が200℃
では圧延後の450℃の加熱時にブリスターの発生
を完全に防止することができない。また180度密
着曲げ試験による膜密着性についてもアルミニウ
ム被覆厚が20μの場合は結果が一定せず結果の再
現性がなく、30μ以上の膜厚では目視で中程度の
大きさの割れが発生する。さらに大気暴露試験に
おけるアンダーフイルムコロージヨン状の腐食に
対する改善効果も少なく実用に供することはでき
なかつた。すなわち従来、20μ以上の膜厚を有す
る粉末法アルミニウム被覆鋼板のアンダーフイル
ムコロージヨン状腐食に対する効果的な方法はな
かつた。
本発明の目的は上記の従来技術の問題点を解決
し、アルミニウム膜密着性とアンダーフイルムコ
ロージヨン状腐食に対する耐食性がすぐれた高品
質のアルミニウム被覆鋼板の製造方法を提供する
にある。
本発明の要旨とするところは次のとおりであ
る。すなわち鋼板の表面にアルミニウムもしくは
アルミニウム合金粉末を層状に塗布する工程と、
前記粉末塗布鋼板を加熱、圧延、再加熱または圧
延、加熱、再圧延、再加熱する工程とを有して成
るアルミニウムもしくはアルミニウム合金被覆鋼
板の製造方法において、前記鋼板表面の粉末塗布
工程に先行してNi：0.5〜80％を含むZn−Ni合金
を0.01〜0.3μの厚さ範囲で該鋼板表面に予備被覆
する工程を有することを特徴とするアルミニウム
もしくはアルミニウム合金被覆鋼板の製造方法で
ある。
本発明の基礎になつた実験について説明する。
第１表に示す如く、ZnとNiの含有率を種々に変
更したZn−Ni合金を、鋼板の表面に被覆厚さを
0.005，0.01，0.1，0.3，0.5μの５種の厚さに予備
被覆を行い、次に製品の被覆厚が30〜70μの厚さ
になるようにアルミニウム粉末を被覆し、通常の
工程により加熱、圧延、再加熱処理を行いアルミ
ニウム被覆鋼板を製作した。これらの鋼板につい
て、製造工程中におけるブリスター発生密度、曲
げによるアルミニウム被膜の密着性および１年間
の屋外暴露試験後の板端部におけるアンダーフイ
ルムコロージヨン状の腐食幅等を調査し、その結
果を同じく前記第１表に示した。なお曲げによる
被膜の密着性試験の結果で０となつているのは
180度密着曲げで亀裂が発生しないことを示して
いる。
第１表からブリスターが発生せずアルミニウム
被膜の密着性が良好なのは、純ZnおよびNiが80
％以下のZn−Ni合金を0.01〜0.3μの厚さ範囲に予
備被覆した場合である。また屋外暴露試験による
アンダーフイルムコロージヨン状の腐食が発生し
ないのは、0.5〜80％のNiを含有するZn−Ni合金
を0.01〜0.3μの厚さに予備被覆した場合である。
Zn−Ni合金のNi含有率が80％を越えるとブリ
スター発生、膜密着性およびアンダーフイルムコ
ロージヨン状腐食に対しての効果が減少し、
The present invention relates to a method for manufacturing an aluminum or aluminum alloy coated steel sheet, and particularly to a method for manufacturing a coated steel sheet that has excellent weather resistance and aluminum coating adhesion. In general, powder-processed aluminum-coated steel sheets with an aluminum film thickness of 20μ or more have very small pinholes, so their corrosion resistance is generally good, but when exposed to the atmosphere, the exposed end of the steel sheet rusts, and the exposure time It is well known that over time corrosion progresses in the form of under-film corrosion at the interface between the steel plate and aluminum, causing the aluminum to peel off. To solve this problem, in the conventional manufacturing method of powder aluminum coated steel sheets, before coating the powder aluminum, 0.5g/
A pretreatment method for coating nickel with a size of m 2 or more has been proposed. In this method, the surface of the steel plate is coated with nickel as described above, and then a suspension of powdered aluminum dispersed in water is applied to the steel plate by roll coating.
Dry at °C. After that, 3t per 1cm width of steel plate
The steel sheet is rolled under a load of 0.5g/m2 or more , and then heated at 450℃ for 1 minute, cooled, and then pressure adjusted with a load of 1.2t per 1cm width of the steel plate. It is characterized by having a thickness of 20μ. However, this method has the following problems. In other words, the drying temperature after applying the suspension is 200℃.
However, it is not possible to completely prevent blisters from occurring during heating at 450°C after rolling. Also, regarding film adhesion in a 180 degree close bending test, when the aluminum coating thickness is 20μ, the results are not consistent and the results are not reproducible, and when the film thickness is 30μ or more, medium-sized cracks occur when visually observed. . Furthermore, the effect of improving under-film corrosion in the atmosphere exposure test was too small, and it could not be put to practical use. That is, until now, there has been no effective method for preventing under-film corrosion of powder-processed aluminum-coated steel sheets having a film thickness of 20 μm or more. An object of the present invention is to solve the above-mentioned problems of the prior art and to provide a method for manufacturing a high-quality aluminum-coated steel sheet with excellent aluminum film adhesion and corrosion resistance against under-film corrosion. The gist of the present invention is as follows. That is, a process of applying aluminum or aluminum alloy powder in a layer on the surface of a steel plate,
In the method for producing an aluminum or aluminum alloy coated steel sheet, which comprises heating, rolling, and reheating the powder coated steel sheet, or rolling, heating, rerolling, and reheating the powder coated steel sheet, the step of applying powder to the surface of the steel sheet is preceded by the step of applying powder to the surface of the steel sheet. A method for producing an aluminum or aluminum alloy coated steel sheet, comprising the step of pre-coating the surface of the steel sheet with a Zn--Ni alloy containing 0.5-80% Ni to a thickness of 0.01-0.3μ. The experiments that formed the basis of the present invention will be explained.
As shown in Table 1, Zn-Ni alloys with various Zn and Ni contents were coated on the surface of the steel plate to a coating thickness.
Pre-coating is performed to five thicknesses of 0.005, 0.01, 0.1, 0.3, and 0.5μ, then the product is coated with aluminum powder to a coating thickness of 30 to 70μ, and heated using the normal process. , rolled and reheated to produce an aluminum coated steel plate. Regarding these steel plates, we investigated the blister density during the manufacturing process, the adhesion of the aluminum coating due to bending, and the width of underfilm corrosion at the edge of the plate after a one-year outdoor exposure test. It is shown in Table 1 above. In addition, the results of the film adhesion test by bending are 0.
This shows that no cracks occur during 180 degree close bending. From Table 1, pure Zn and Ni have good adhesion without causing blisters.
% or less of Zn-Ni alloy to a thickness range of 0.01 to 0.3μ. Further, under film corrosion in the outdoor exposure test does not occur when the Zn-Ni alloy containing 0.5 to 80% Ni is pre-coated to a thickness of 0.01 to 0.3 μm. When the Ni content of the Zn-Ni alloy exceeds 80%, its effectiveness against blistering, film adhesion, and underfilm corrosion decreases.
【表】【table】
【表】【table】
【表】
また0.5％未満においてはブリスター発生、膜密
着性には有効であるが、アンダーフイルムコロー
ジヨン状腐食に対する改善効果が少ない。
予備被覆の厚さは0.01μ未満あるいは0.3μを越
えるといずれもブリスター発生防止、膜の密着性
およびアンダーフイルムコロージヨン状腐食の耐
食性等の向上に対する作用効果が少ない。
上記の結果から本発明においては、予備被覆の
材質をNi0.5〜80％のZn−Ni合金に被覆厚さを
0.01〜0.3μに限定した。
上記の如き限定成分を有するZn−Ni合金の予
備被覆は通常電気化学的めつきによつて行われる
が、次工程のアルミニウム粉末の鋼板への塗布
は、従来からのバーコーター法、ロールコーター
法、スプレー法等によるアルミニウム懸濁液の塗
布によつて行われる。アルミニウム粉末塗布乾燥
に引続く工程は１回圧延法あるいは２回圧延法い
ずれの方法でもよいが、例えば１回圧延法による
場合はアルミニウム懸濁液を塗布後、被覆層が乾
燥する程度に加熱し、ついで被覆層から揮発分あ
るいは脱水等のガス分を十分に放出させるために
300〜550℃に加熱する。加熱後は圧延機により圧
下率２％以上で軽く圧延し最後に加工歪を除去し
かつ被覆層と鋼板との接着力を強化するため500
〜600℃の温度範囲において、Fe−Al合金層が生
成しない条件で仕上加熱をする。
なおアルミニウム粉末による被覆鋼板について
主として説明したが、被覆鋼板の用途によつては
アルミニウム合金粉末を使用し、例えば耐熱性が
要求される場合にはAl−Si合金の粉末を鋼板の
被覆に使用する。
実施例
第２表に示す如き0.5，1.0および0.24mmの厚さ
の鋼板を、第２表に示す工程および条件で脱脂、
洗浄、予備被覆を行い第２表に示すアルミニウム
もしくはアルミニウム合金の−250メツシユの粉
末８ｇを10ｇの水に懸濁し、懸濁液をロールコー
ターでそれぞれ塗布した。この塗布鋼板を150℃
の乾燥炉で乾燥し、次に450℃の大気中で加熱後、
圧延機で５％の圧延を実施し、さ[Table] Also, if it is less than 0.5%, it is effective for blistering and film adhesion, but it has little effect on improving under film collage corrosion. If the thickness of the preliminary coating is less than 0.01 μm or more than 0.3 μm, it will not be effective in preventing blistering, improving film adhesion, and improving corrosion resistance against under-film corrosion. Based on the above results, in the present invention, the pre-coating material is a Zn-Ni alloy containing 0.5 to 80% Ni, and the coating thickness is
It was limited to 0.01-0.3μ. Preliminary coating of the Zn-Ni alloy having the above-mentioned limited components is usually carried out by electrochemical plating, but the next step of applying aluminum powder to the steel plate is the conventional bar coater method or roll coater method. This is carried out by applying an aluminum suspension using a spray method or the like. The step subsequent to coating and drying the aluminum powder may be either a single rolling method or a double rolling method, but for example, in the case of a single rolling method, after applying the aluminum suspension, heat is applied to an extent that the coating layer is dried. Then, in order to sufficiently release volatile matter or dehydrated gas from the coating layer.
Heat to 300-550℃. After heating, it is lightly rolled using a rolling machine at a reduction rate of 2% or more, and finally 500 mm is used to remove processing strain and strengthen the adhesive force between the coating layer and the steel plate.
Finish heating is performed in a temperature range of ~600°C under conditions that do not generate an Fe-Al alloy layer. Although we have mainly explained steel sheets coated with aluminum powder, aluminum alloy powder may be used depending on the application of the coated steel sheet. For example, if heat resistance is required, Al-Si alloy powder may be used to coat the steel sheet. . Examples Steel plates with thicknesses of 0.5, 1.0 and 0.24 mm as shown in Table 2 were degreased and
After washing and pre-coating, 8 g of -250 mesh powder of aluminum or aluminum alloy shown in Table 2 was suspended in 10 g of water, and each suspension was applied using a roll coater. Heat this coated steel plate to 150℃.
After drying in a drying oven and then heating in the atmosphere at 450℃,
Perform 5% rolling with a rolling mill, and
【表】【table】
【表】
らに550℃に仕上加熱を行つた。
上記の如き条件で製造した３種の実施例はいず
れもブリスターが発生せず、曲げによるアルミニ
ウム被膜の密着性は良好であり、また試片端部を
シールしない１年間の大気暴露試験においても試
片端部のアンダーフイルムコロージヨン状の腐食
は全く発生しなかつた。
上記実施例からも明らかな如く、本発明はアル
ミニウムもしくはアルミニウム合金被覆鋼板を
Zn−Ni合金により予備被覆することによつて、
耐候性と被膜の密着性のすぐれたアルミニウムも
しくはアルミニウム合金被覆鋼板を製造すること
ができた。[Table] Finishing heating was performed at 550°C. In all three examples manufactured under the above conditions, no blisters occurred, and the adhesion of the aluminum coating during bending was good, and even in a one-year atmospheric exposure test in which the ends of the specimens were not sealed, No under-film corrosion occurred at all. As is clear from the above examples, the present invention uses aluminum or aluminum alloy coated steel sheets.
By pre-coating with Zn-Ni alloy,
We were able to produce aluminum or aluminum alloy coated steel sheets with excellent weather resistance and coating adhesion.
Claims (1)
ウム合金粉末を層状に塗布する工程と、前記粉末
塗布鋼板を加熱、圧延、再加熱または圧延、加
熱、再圧延、再加熱する工程とを有して成るアル
ミニウムもしくはアルミニウム合金被覆鋼板の製
造方法において、前記鋼板表面の粉末塗布工程に
先行してNi0.5〜80％を含むZn−Ni合金を0.01〜
0.3μの厚さ範囲で該鋼板表面に予備被覆する工程
を有することを特徴とするアルミニウムもしくは
アルミニウム合金被覆鋼板の製造方法。1 Aluminum or aluminum comprising the steps of applying aluminum or aluminum alloy powder in a layer on the surface of a steel plate, and heating, rolling, reheating or rolling, heating, rerolling, reheating the powder coated steel plate. In the method for producing an alloy-coated steel sheet, prior to the powder coating step on the surface of the steel sheet, a Zn-Ni alloy containing 0.5 to 80% Ni is applied to the surface of the steel sheet in an amount of 0.01 to 80%.
A method for producing an aluminum or aluminum alloy coated steel sheet, comprising the step of pre-coating the surface of the steel sheet to a thickness within the range of 0.3μ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1459882A JPS58133378A (en) | 1982-02-01 | 1982-02-01 | Manufacture of steel plate coated with aluminum or aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1459882A JPS58133378A (en) | 1982-02-01 | 1982-02-01 | Manufacture of steel plate coated with aluminum or aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58133378A JPS58133378A (en) | 1983-08-09 |
| JPS6323271B2 true JPS6323271B2 (en) | 1988-05-16 |
Family
ID=11865619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1459882A Granted JPS58133378A (en) | 1982-02-01 | 1982-02-01 | Manufacture of steel plate coated with aluminum or aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58133378A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0185279U (en) * | 1987-11-27 | 1989-06-06 | ||
| JPH01137888U (en) * | 1988-03-11 | 1989-09-20 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200303828Y1 (en) * | 2002-11-27 | 2003-02-11 | 오웅배 | golf training plane for excersizing swing |
| CN104611613A (en) * | 2014-12-12 | 2015-05-13 | 北京北矿锌业有限责任公司 | Zinc nickel alloy piece pigment and production method and application thereof |
-
1982
- 1982-02-01 JP JP1459882A patent/JPS58133378A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0185279U (en) * | 1987-11-27 | 1989-06-06 | ||
| JPH01137888U (en) * | 1988-03-11 | 1989-09-20 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58133378A (en) | 1983-08-09 |
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