JPS62228499A - Zinc alloy plated steel sheet having superior paintability - Google Patents
Zinc alloy plated steel sheet having superior paintabilityInfo
- Publication number
- JPS62228499A JPS62228499A JP7188586A JP7188586A JPS62228499A JP S62228499 A JPS62228499 A JP S62228499A JP 7188586 A JP7188586 A JP 7188586A JP 7188586 A JP7188586 A JP 7188586A JP S62228499 A JPS62228499 A JP S62228499A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- alloy
- based alloy
- plated steel
- plating
- 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.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 24
- 239000010959 steel Substances 0.000 title claims abstract description 24
- 229910001297 Zn alloy Inorganic materials 0.000 title abstract 7
- 239000000956 alloy Substances 0.000 claims abstract description 32
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 32
- 238000007747 plating Methods 0.000 claims abstract description 24
- 229910007567 Zn-Ni Inorganic materials 0.000 claims abstract description 4
- 229910007614 Zn—Ni Inorganic materials 0.000 claims abstract description 4
- 229910052796 boron Inorganic materials 0.000 claims abstract description 3
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 2
- 239000008199 coating composition Substances 0.000 claims 1
- 229910019142 PO4 Inorganic materials 0.000 abstract description 12
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract description 12
- 239000010452 phosphate Substances 0.000 abstract description 12
- 238000004070 electrodeposition Methods 0.000 abstract description 9
- 239000003973 paint Substances 0.000 abstract description 8
- 229910000640 Fe alloy Inorganic materials 0.000 abstract description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract description 2
- 239000004327 boric acid Substances 0.000 abstract description 2
- 238000010422 painting Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 12
- 238000000576 coating method Methods 0.000 description 12
- 238000005260 corrosion Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 5
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000010960 cold rolled steel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- XDVOLDOITVSJGL-UHFFFAOYSA-N 3,7-dihydroxy-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound O1B(O)OB2OB(O)OB1O2 XDVOLDOITVSJGL-UHFFFAOYSA-N 0.000 description 1
- 229910000713 I alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- -1 tetrafluoroborate Chemical compound 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は電着塗装の仕上り性に優れたＺｎ系合金めっき
鋼板に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a Zn-based alloy coated steel sheet with excellent finishability in electrodeposition coating.
（従来技術）
従来上り自′ｆ１１車車体の防食性能を向上させるのに
冷延鋼板製の部材にカチオン電着塗装を施しているが、
最迎はこれだけでは防食性能が不十分なため、部材素材
に冷延鋼板に防食性の優れたＮｉ含有率８−２０ｗｔ％
のＺｎ−Ｎｉ系合金やＦｅ含有率１０〜５０ｗｔ％のＺ
ｎ−Ｆｅ系合金などをめっきしたＺｎ系合金めっき鋼板
を使用し、カチオン７ＩｆＬ着塗装との組合わせにより
防食性能の向上を図ることが行なわれている。(Prior art) Cationic electrodeposition coating has been applied to cold-rolled steel plate members to improve the anti-corrosion performance of the F11 car body.
The best option is to use cold-rolled steel sheets with a Ni content of 8-20wt%, which has excellent corrosion resistance, as the corrosion resistance is insufficient with this alone.
Zn-Ni alloy with Fe content of 10 to 50 wt%
A Zn-based alloy plated steel plate plated with an n-Fe-based alloy or the like is used in combination with cationic 7IfL coating to improve anti-corrosion performance.
しかしこれらのＺｎ系合金めっき鋼板はリン酸塩処理を
施した後カチオン電着塗装を施すと塗膜にクレータが発
生し易く、塗装仕上り性が劣るとν１う問題があった。However, when these Zn-based alloy plated steel sheets are subjected to cationic electrodeposition coating after phosphate treatment, craters are likely to occur in the coating film, resulting in poor coating finish.
（発明が解決しようとする問題点）
本発明はＺｎ系合金めっきのクレータ発生によるかかる
塗装仕上り性の問題を解決しためつき鋼板を提供するも
のである。(Problems to be Solved by the Invention) The present invention provides a toughened steel sheet that solves the problem of paint finish quality caused by the occurrence of craters in Zn-based alloy plating.
（問題、ｒ：ｊ、を解決するための手段）本発明者らは
従来のＺｎ系合金めつきが塗装仕上り性に劣る原因につ
いて種々調査した結果、前処理のリン酸塩処理において
緻密なリン酸塩皮膜が形成されないためであることが判
明しノ２゜すなわちリン酸塩皮膜が粗大で、緻密性に欠
けると、電着塗装の際電流分布が不均一になり、ミクロ
的に電流が炎中する部位があるため、その部位にクレー
タが発生するのである。(Means for solving problem r:j) The present inventors investigated various reasons why conventional Zn-based alloy plating has poor paint finish properties, and found that It turns out that this is because the phosphate film is not formed.2゜That is, if the phosphate film is coarse and lacks density, the current distribution during electrodeposition coating becomes uneven, and the current is microscopically caused by the flame. Because there are certain parts of the earth that are affected, craters occur in those parts.
そこで本発明者らは緻密なリン酸塩皮膜が形成されるＺ
ｎ系合金めっき鋼板を開発すべく種々検討した結果、め
っき層中にＢ（ホウ素）を含有させれば、緻密なリン酸
塩皮膜が形成されることを見出したのである０本発明は
かかる知見に基づいてなされたもので、鋼板にＢを含有
するＺｎ系合金めっきを施したことをＵ徴としている。Therefore, the present inventors investigated Z
As a result of various studies aimed at developing an n-based alloy plated steel sheet, it was discovered that a dense phosphate film can be formed if B (boron) is included in the plating layer.The present invention is based on this knowledge. It was made based on the above, and the U feature is that the steel plate is plated with a Zn-based alloy containing B.
本発明のＺｎ系合金めっき調板において、めっ軽層にＢ
を含有させると、緻密なリン酸塩皮膜が形成される理由
は明らかではないが、Ｂがリン酸塩皮膜形成の際核にな
るため、ｍ密な皮膜が形成されるものと推定される。In the Zn-based alloy plating plate of the present invention, B is added to the plating layer.
The reason why a dense phosphate film is formed when B is included is not clear, but it is presumed that since B becomes a nucleus during the formation of a phosphate film, an m-dense film is formed.
ＢをＺｎ系合金めっき層中に含有させるには通常の／１
１′Ａ合金電シ（めっき俗にホウ酸、メタホウ酸、可溶
性メタホウ酸塩、可溶性４ホウ酸堪、テトラフルオロホ
ウ酸塩などのようなホウ素化合物を１種または２種以」
二添加して、浴のｐＨを１．５〜３．０に１１１！整し
てめっきすればよい。In order to contain B in the Zn-based alloy plating layer, the usual /1
1'A alloy electroplating (commonly known as plating) containing one or more boron compounds such as boric acid, metaboric acid, soluble metaborate, soluble tetraboric acid, tetrafluoroborate, etc.
111 to bring the pH of the bath to 1.5-3.0! All you have to do is prepare it and plate it.
めっき）（４のＢ含有率は０．００１〜３ｗｔ％にする
のが好ましい。これはＢ含有率がＯ，００１ｗｔ％未満
であると、リン酸塩皮膜が粗大になり、電着塗装でクレ
ータ発生を抑制する効果がな（，３ｗｔ％を越えてもそ
の効果は飽和し、３ａ＋Ｌ％よｒ＞＊くする意味がない
からである。このＢ含有率はめっき層がＺｎ−旧糸合金
であってもＺｎ−Ｆｅ系合金であっても変える必要がな
い。Plating) (The B content in step 4 is preferably 0.001 to 3 wt%. If the B content is less than 0.001 wt%, the phosphate film will become coarse, causing craters in electrodeposition coating. This is because the effect of suppressing generation is not effective even if it exceeds 3wt%, and there is no point in increasing 3a+L%. Even if it is a Zn-Fe alloy, there is no need to change it.
またＺｎ系合金めっき層はＮｉ（但しＺｎ−Ｆｅ１？Ｓ
今金に対して）、Ｆｅ（但しＺｎ−旧糸合金に対して）
、Ｇｏ。In addition, the Zn-based alloy plating layer is made of Ni (however, Zn-Fe1?S
(for now gold), Fe (but for Zn-old thread alloy)
, Go.
Ｎｏ、 Ｃｒ、’ ＴｉおよびＳＩ＋などの元素の１種
または２種以上を徹り、含むものであってもＢ ｆｃ金
含有せれば、ｍ密なリン酸塩皮膜が形成され、塗装仕上
り性を向」二させることがきる。Even if one or more of the elements such as No., Cr, 'Ti and SI+ are included, if it contains B fc gold, a dense phosphate film will be formed and the paint finish will be improved. It is possible to make the two directions.
なおＺｎ系合金めっき層がＺｎ−Ｎｉ系合金の場合、Ｎ
ｉ含有率を従来のように８〜２０ｗｔ％に、またＺｎ系
合金めっき層がＺｎ−Ｆｅ系合金の場合はＦｅ含有率を
１０〜５（１ｗｔ％にするのが好ましい。これは各めっ
き層ともＮｉやＦｅの含有率が下限より少ないと、耐食
性が純Ｚｎめっき鋼板に近くなり、めっき層の腐食速度
が大き過ぎて、長期防食性に欠けるからであｌ）、逆に
上限を越えると鋼素地に対するめっき層の防食能が小さ
くなり、めっきした効果が少なくなるからである。Note that when the Zn-based alloy plating layer is a Zn-Ni-based alloy, N
It is preferable to set the i content to 8 to 20 wt% as in the conventional case, and to set the Fe content to 10 to 5 (1 wt%) if the Zn-based alloy plating layer is a Zn-Fe-based alloy. If the content of Ni or Fe is less than the lower limit, the corrosion resistance will be close to that of pure Zn-plated steel sheet, and the corrosion rate of the coating layer will be too high, resulting in a lack of long-term corrosion protection.On the other hand, if it exceeds the upper limit, This is because the anti-corrosion ability of the plating layer against the steel base will be reduced, and the plating effect will be reduced.
次に実施例により本発明を説明する。Next, the present invention will be explained with reference to Examples.
（実施例）
板厚０．７ｔｎａａの冷延鋼板に通常の脱脂および酸洗
処理を施して、：＆面を清浄にしすこ後、第１及に示す
条件でＢｆｅ−含有するＺｏ−Ｆｅ合金またはＺｎ−Ｎ
ｉ合金めっきを施した。(Example) A cold-rolled steel plate with a thickness of 0.7 tnaa was subjected to normal degreasing and pickling treatment, and after cleaning the surface, Bfe-containing Zo-Fe alloy or Zn-N
I-alloy plating was applied.
その後このめっき鋼板と従来のＺｎ−旧合金めっき鋼板
お上ＶＺｎ−Ｆｅ合金めっき鋼板とを市販のリン酸塩処
理液（ＢＥ ：（０３０、日本パーカー製）で処理した
後、カチオン電着塗装を施し、焼付乾燥後塗膜に発生し
たクレータ敗を調査しｒこ。なお電着塗装の際は塗料と
してはニレクロン＃９０００（関西ペイント製）を使用
して、ドカン法により２８０Ｖで塗膜厚み２５μｍに電
着し、焼付乾燥は１８０ ’Ｃて・２０分間行った。第
２表に電着塗装塗膜の単位面積当りのクレータ発生数を
目視観察により判定した結果を示す。After that, this plated steel plate, the conventional Zn-old alloy plated steel plate, and the VZn-Fe alloy plated steel plate were treated with a commercially available phosphate treatment solution (BE: (030, manufactured by Nippon Parker)), and then cationic electrodeposition coating was applied. Investigate the crater damage that occurred on the paint film after baking and drying.For electrodeposition coating, use Nireclone #9000 (manufactured by Kansai Paint) as the paint, and apply the dokan method at 280V to a paint film thickness of 25 μm. The electrodeposited film was electrodeposited and baked and dried for 20 minutes at 180'C.Table 2 shows the results of visual observation of the number of craters generated per unit area of the electrodeposited film.
第２５に示すようにＺｎ系合金めっき層にＢを含有させ
れば、Ｂを含有しない従来のＺｎ系合金めっき鋼板より
クレータの発生数を著しく少なくすることができる。As shown in No. 25, if the Zn-based alloy plating layer contains B, the number of craters generated can be significantly reduced compared to the conventional Zn-based alloy-plated steel sheet that does not contain B.
（効果）
以上のごとく本発明のＺｎ系合金めっき鋼板は従来のも
のより緻密なリン酸塩皮膜が形成されるので、自動車１
１Ｌ体の部材などのごとく電着塗装を施す用途に使用し
た場合塗装仕上がり性が良好になり、外観を向上させる
ことができる。(Effects) As described above, the Zn-based alloy plated steel sheet of the present invention forms a denser phosphate film than conventional ones, so
When used in applications where electrodeposition coating is applied, such as 1L body parts, the finish quality of the coating is good and the appearance can be improved.
Claims (4)
を施したことを特徴とする塗装性に優れたＺｎ系合金め
っき鋼板。(1) A Zn-based alloy-plated steel sheet with excellent paintability, characterized in that a steel sheet is coated with a Zn-based alloy containing B (boron).
ｔ％であることを特徴とする特許請求の範囲第１項に記
載の塗装性に優れたＺｎ系合金めっき鋼板。(2) B content of Zn-based alloy plating is 0.001 to 3w
A Zn-based alloy plated steel sheet with excellent paintability as set forth in claim 1, wherein the Zn-based alloy plated steel sheet has a coating composition of t%.
ることを特徴とする特許請求の範囲第１項に記載の塗装
性に優れたＺｎ系合金めっき鋼板。(3) The Zn-based alloy plated steel sheet with excellent paintability as set forth in claim 1, wherein the Zn-based alloy plating is Zn-Ni-based alloy plating.
ることを特徴とする特許請求の範囲第１項に記載の塗装
性に優れたＺｎ系合金めっき鋼板。(4) A Zn-based alloy coated steel sheet with excellent paintability as set forth in claim 1, wherein the Zn-based alloy plating is Zn-Fe based alloy plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61071885A JPH0768635B2 (en) | 1986-03-29 | 1986-03-29 | Electric Zn alloy plated steel sheet with excellent paintability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61071885A JPH0768635B2 (en) | 1986-03-29 | 1986-03-29 | Electric Zn alloy plated steel sheet with excellent paintability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62228499A true JPS62228499A (en) | 1987-10-07 |
| JPH0768635B2 JPH0768635B2 (en) | 1995-07-26 |
Family
ID=13473429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61071885A Expired - Lifetime JPH0768635B2 (en) | 1986-03-29 | 1986-03-29 | Electric Zn alloy plated steel sheet with excellent paintability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0768635B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5993897A (en) * | 1982-11-20 | 1984-05-30 | Kawasaki Steel Corp | Surface treated steel sheet having high corrosion resistance |
| JPS59166666A (en) * | 1983-03-08 | 1984-09-20 | Sumitomo Electric Ind Ltd | Product coated with heat resistant zinc alloy |
| JPS60114590A (en) * | 1983-11-22 | 1985-06-21 | Sumitomo Metal Ind Ltd | Surface treated steel sheet with superior solderability |
-
1986
- 1986-03-29 JP JP61071885A patent/JPH0768635B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5993897A (en) * | 1982-11-20 | 1984-05-30 | Kawasaki Steel Corp | Surface treated steel sheet having high corrosion resistance |
| JPS59166666A (en) * | 1983-03-08 | 1984-09-20 | Sumitomo Electric Ind Ltd | Product coated with heat resistant zinc alloy |
| JPS60114590A (en) * | 1983-11-22 | 1985-06-21 | Sumitomo Metal Ind Ltd | Surface treated steel sheet with superior solderability |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0768635B2 (en) | 1995-07-26 |
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