JPH05106057A - Manufacture of transparent fluorinated resin coated stainless steel sheet - Google Patents
Manufacture of transparent fluorinated resin coated stainless steel sheetInfo
- Publication number
- JPH05106057A JPH05106057A JP29367191A JP29367191A JPH05106057A JP H05106057 A JPH05106057 A JP H05106057A JP 29367191 A JP29367191 A JP 29367191A JP 29367191 A JP29367191 A JP 29367191A JP H05106057 A JPH05106057 A JP H05106057A
- Authority
- JP
- Japan
- Prior art keywords
- ions
- stainless steel
- steel sheet
- weight ratio
- total
- 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
Abstract
Description
【００１】[001]
【産業上の利用分野】本発明は、塗布型クロメート処理
液を前処理に用いてもクロメート皮膜の色調が外観に表
れにくい透明フッ素樹脂被覆ステンレス鋼板の製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a transparent fluororesin-coated stainless steel sheet in which the color tone of a chromate film is less likely to appear in appearance even when a coating type chromate treatment liquid is used for pretreatment.
【００２】[002]
【従来技術】ステンレス鋼板は、塩素イオンに弱いの
で、海岸地帯などに使用する場合には高価な高耐食性鋼
種のものを使用する以外塗装する必要がある。しかし、
着色塗料を塗装したのではステンレス鋼板の美しい外観
が消滅し、着色塗装めっき鋼板などと外観が変わらなく
なってしまう。そこで、最近透明樹脂塗料を塗装して、
塗装後もステンレス鋼板の外観を維持するようにしてい
る。2. Description of the Related Art Since stainless steel sheets are vulnerable to chlorine ions, when they are used in coastal areas or the like, it is necessary to coat them unless expensive high corrosion resistant steel grades are used. But,
If the colored paint is applied, the beautiful appearance of the stainless steel plate disappears, and the appearance does not change from that of the colored coated steel plate. So, recently I applied a transparent resin paint,
The appearance of the stainless steel plate is maintained even after painting.
【００３】この透明樹脂塗料を塗装する方法としては、
ステンレス鋼板にクロメ−ト処理を施して、透明フッ素
樹脂塗料を塗装する方法が知られている。しかし、ステ
ンレス鋼板は、表面が耐食性の酸化クロム皮膜に覆わ
れ、しかも、濡れ性に劣るため、反応型、塗布型いずれ
のクロメ−ト処理によっても十分なる耐食性を有するク
ロメ−ト皮膜を形成することができない。As a method of applying this transparent resin paint,
A method is known in which a stainless steel plate is chromated and a transparent fluororesin paint is applied. However, since the surface of a stainless steel sheet is covered with a corrosion-resistant chromium oxide film and has poor wettability, a chromate film having sufficient corrosion resistance is formed by any of the reaction-type and coating-type chromate treatments. I can't.
【００４】このクロメート皮膜耐食性の問題を解決する
には、クロメ−ト処理を塗布型クロメ−ト処理にして、
そのクロメ−ト処理前にステンレス鋼板にリン酸塩処理
を施すことにより濡れ性を向上させる方法が知られてい
る（特公昭６３−６６３９３号）。In order to solve the problem of the corrosion resistance of the chromate film, the chromate treatment is changed to the coating type chromate treatment, and
There is known a method for improving wettability by subjecting a stainless steel plate to a phosphate treatment before the chromate treatment (Japanese Patent Publication No. 63-66393).
【００５】[0095]
【発明が解決しようとする課題】しかしながら、塗布型
クロメート処理は、本来厚クロメ−ト処理による高耐食
性付与を目的とするものであるので、クロメ−ト皮膜は
黄色に着色している。このため、透明フッ素樹脂塗料の
塗装に用いた場合、クロメ−ト皮膜の黄色が外観に表
れ、ステンレス鋼板の銀白色外観が損なわれてしまう。
本発明は、かかる問題を解決した透明フッ素樹脂被覆ス
テンレス鋼板の製造方法を提供するものである。However, since the coating type chromate treatment is intended to impart high corrosion resistance by the thick chromate treatment, the chromate film is colored yellow. Therefore, when it is used for coating a transparent fluororesin paint, the yellow color of the chromate film appears in the appearance and the silver-white appearance of the stainless steel plate is impaired.
The present invention provides a method for producing a transparent fluororesin-coated stainless steel plate that solves the above problems.
【００６】[0096]
【課題を解決するための手段】本発明において適用され
るクロメ−ト処理液は、その処理液中にリン酸イオンま
たはリン酸イオンとシリカを含み、着色の原因となる６
価クロムイオンの一部を３価クロムイオンにして、６価
クロムイオンに対する３価クロムイオン量を特定し、か
つ、全クロムイオンに対するリン酸イオン量およびシリ
カ量を特定し、耐食性、塗膜密着性を維持した状態でク
ロメ−ト皮膜が着色しないようにしたものである。The chromate treatment liquid applied in the present invention contains phosphate ions or phosphate ions and silica in the treatment liquid, and causes coloring.
Part of the valent chromium ions are converted to trivalent chromium ions, the trivalent chromium ion amount relative to the hexavalent chromium ion is specified, and the phosphate ion amount and silica amount relative to the total chromium ions are specified, and corrosion resistance and coating adhesion The chromate film is prevented from being colored while maintaining the property.
【００７】すなわち、本発明は、予めリン酸塩処理を施
したステンレス鋼板に全クロムイオンとして１〜４０ｇ
／ｌとリン酸イオンとを含み、３価クロムイオン／全ク
ロムイオンの重量比が０.６〜２.０、リン酸イオン／全
クロムイオンの重量比が０.５〜２.０であるクロメート
処理液または全クロムイオンとして１〜４０ｇ／ｌ、リ
ン酸イオンおよびシリカを含み、３価クロムイオン／６
価クロムイオンの重量比が０.６〜２.０、リン酸イオン
／全クロムイオンの重量比が０.５〜２.０、シリカ／全
クロムイオンの重量比が０.１〜４.０であるクロメート
処理液を金属クロム換算で５〜４０ｍｇ／ｍ2塗布し
て、水洗することなく乾燥した後、透明フッ素樹脂塗料
を塗装し、乾燥することにより透明フッ素樹脂被覆ステ
ンレス鋼板を製造するようにした。That is, according to the present invention, a total of chromium ions are added in an amount of 1 to 40 g on a stainless steel plate which has been previously subjected to a phosphate treatment.
/ L and phosphate ions, the weight ratio of trivalent chromium ions / total chromium ions is 0.6 to 2.0, and the weight ratio of phosphate ions / total chromium ions is 0.5 to 2.0. Chromate treatment liquid or 1-40 g / l as total chromium ions, containing phosphate ion and silica, trivalent chromium ion / 6
The weight ratio of valent chromium ions is 0.6 to 2.0, the weight ratio of phosphate ions / total chromium ions is 0.5 to 2.0, and the weight ratio of silica / total chromium ions is 0.1 to 4.0. 5 to 40 mg / m 2 of chromate treatment liquid is converted to metallic chromium, dried without washing with water, coated with a transparent fluororesin paint, and dried to produce a transparent fluororesin-coated stainless steel plate. I chose
【００８】[0085]
【作用】本発明の製造方法は、ステンレス鋼板の鋼種、
表面仕上げに関係なく適用できる。また、リン酸塩処理
は、従来より塗装下地処理に使用されているリン酸塩処
理剤、例えば、リン酸亜鉛系処理剤、リン酸鉄系処理剤
などを用いて、スプレ−法、浸漬法などにより処理すれ
ばよい。ステンレス鋼板に汚れや油などの異物が付着し
ていて、リン酸塩処理が良好に行われない場合には、リ
ン酸塩処理前に脱脂、酸洗、水洗などを施してもよい。The operation of the present invention is carried out according to the type of stainless steel plate,
Applicable regardless of surface finish. Further, the phosphate treatment is carried out by a spray method or a dipping method using a phosphate treating agent which has been conventionally used for coating base treatment, such as a zinc phosphate type treating agent or an iron phosphate type treating agent. It may be processed by the following. When foreign substances such as dirt and oil adhere to the stainless steel plate and the phosphate treatment is not performed well, degreasing, pickling, water washing, etc. may be performed before the phosphate treatment.
【００９】クロメ−ト処理液は、耐食性劣化と着色を避
けるため、全クロムイオン濃度を１〜４０ｇ／ｌにす
る。全クロムイオン濃度が１ｇ／ｌ未満であると、耐食
性が劣り、４０ｇ／ｌを越えると、金属クロム換算で４
０ｍｇ／ｍ2塗布した場合、クロメ−ト皮膜が着色して
しまう。The chromate treatment liquid has a total chromium ion concentration of 1 to 40 g / l in order to avoid deterioration in corrosion resistance and coloration. If the total chromium ion concentration is less than 1 g / l, the corrosion resistance is poor, and if it exceeds 40 g / l, it is 4 in terms of metallic chromium.
When 0 mg / m 2 is applied, the chromate film is colored.
【０１０】上記クロメート処理液は、３価クロムイオン
／６価クロムイオンの重量比を０.６〜２.０にする。こ
の重量比が、０.６未満であると、着色が著しく、２.０
を越えると、耐食性が劣る。また、リン酸イオン量は、
リン酸イオン／全クロムイオンの重量比で０.５〜２.０
になるように添加する。この重量比が０.５未満である
と、クロメ−ト皮膜の着色が著しく、２.０を越える
と、透明フッ素塗膜の２次密着性が劣化してしまう。In the chromate treatment solution, the weight ratio of trivalent chromium ions / hexavalent chromium ions is set to 0.6 to 2.0. When this weight ratio is less than 0.6, coloring is remarkable and 2.0
If it exceeds, corrosion resistance is poor. Also, the phosphate ion amount is
Phosphate ion / total chromium ion weight ratio of 0.5 to 2.0
To be added. If this weight ratio is less than 0.5, the chromate film is markedly colored, and if it exceeds 2.0, the secondary adhesion of the transparent fluorine coating film deteriorates.
【０１１】処理液は、金属クロム換算で５〜４０ｍｇ／
ｍ2塗布して、水洗することなく乾燥する。金属クロム
換算で５ｍｇ／ｍ2より少ないと、クロメ−ト皮膜の透
明性においては優れているが、６価クロム量が少ないた
め、耐食性、塗膜密着性、耐候性が不十分となり、４０
ｍｇ／ｍ2より多いと、着色が著しくなる。The treatment liquid is 5 to 40 mg / metal-chromium conversion.
Apply m 2 and dry without washing with water. If it is less than 5 mg / m 2 in terms of metallic chromium, the transparency of the chromate film is excellent, but since the amount of hexavalent chromium is small, corrosion resistance, coating film adhesion and weather resistance are insufficient.
When it is more than mg / m 2 , coloring becomes remarkable.
【０１２】この塗布型クロメ−ト処理液には、シリカを
シリカ／全クロムイオンの重量比０.１〜４.０となるよ
うに添加すると、透明フッ素塗膜との密着性をさらに向
上させることができる。このシリカとしては、乾式シリ
カ、湿式シリカ、粉砕シリカなどから適宜選択して添加
すればよいが、その添加量は、シリカ／全クロムイオン
の重量比で０.１未満であると、シリカの添加効果が小
さく、４.０を越えると、透明フッ素樹脂塗膜との密着
性の向上効果は飽和してしまう。When silica is added to this coating type chrome treating solution in a weight ratio of silica / total chromium ions of 0.1 to 4.0, the adhesion with the transparent fluorine coating film is further improved. be able to. This silica may be added by appropriately selecting it from dry silica, wet silica, pulverized silica, etc., but if the addition amount is less than 0.1 in the weight ratio of silica / total chromium ions, the addition of silica If the effect is small and it exceeds 4.0, the effect of improving the adhesion to the transparent fluororesin coating film is saturated.
【０１３】透明フッ素樹脂塗料としては熱可塑型、熱硬
化型でもよい。塗膜厚は、用途により決定するが、一般
的な海岸地帯であれば、５〜２５μｍで十分である。The transparent fluororesin paint may be a thermoplastic type or a thermosetting type. The coating film thickness is determined depending on the application, but 5 to 25 μm is sufficient in a general coastal area.
【０１４】[0142]
【実施例】板厚０.４ｍｍのステンレス鋼板をアルカリ
脱脂剤［商品名：ファインクリ−ナ−４３６０、日本パ
−カライジング（株）製］で脱脂して、水洗した後、リ
ン酸亜鉛処理剤［商品名：パルボンド３３１０、日本パ
−カライジング（株）製］を濃度５０ｇ／ｌ、温度６５
℃で処理して、第１表に示す組成のクロメ−ト処理液を
塗布し、水洗することなく乾燥した。EXAMPLE A stainless steel plate having a thickness of 0.4 mm was degreased with an alkaline degreasing agent [trade name: Fine Cleaner 4360, manufactured by Nippon Parkerizing Co., Ltd.], washed with water, and then treated with zinc phosphate. Agent [trade name: Palbond 3310, manufactured by Nippon Parkerizing Co., Ltd.] at a concentration of 50 g / l and a temperature of 65
After treatment at ℃, a chromate treatment liquid having the composition shown in Table 1 was applied and dried without washing with water.
【０１５】次に、透明フッ素樹脂塗料をバ−コ−タ−で
所定の膜厚塗装し、乾燥した。乾燥は、透明フッ素樹脂
塗料が熱可塑型または熱硬化型の場合、６０秒間加熱乾
燥し、常乾型の場合は室温に放置した。Then, a transparent fluororesin coating material was applied with a bar coater to a predetermined thickness and dried. When the transparent fluororesin paint was a thermoplastic type or a thermosetting type, it was dried by heating for 60 seconds, and when it was a normally dry type, it was left at room temperature.
【０１６】以上のようにして製造した塗装鋼板に次の試
験を実施した。第２表に処理条件と試験結果を示す。The coated steel sheets produced as described above were subjected to the following tests. Table 2 shows the processing conditions and test results.
【０１７】（１）外観 目視によりクロメ−ト皮膜による着色を次の基準で評価
した。◎ 殆ど着色なし。○ 僅かに淡い着色。△ 着
色。× 著しい着色。(1) Appearance The coloring by the chromate film was visually evaluated according to the following criteria. ◎ Almost no coloring. ○ Slightly light coloring. △ Coloring. × Marked coloring.
【０１８】（２）塗膜密着性 塗装鋼板をそのまま１８０゜折り曲げする１次密着性試
験と、沸騰水に２時間浸漬した後１８０゜折り曲げする
２次密着性試験とを行い、◎（優）→○→△→×（劣）
で評価した。なお、△以下の評価は使用上問題がある。(2) Adhesion of coating film A primary adhesion test of bending a coated steel sheet as it is by 180 ° and a secondary adhesion test of soaking it in boiling water for 2 hours and then bending it by 180 ° were carried out. → ○ → △ → × (poor)
It was evaluated by. In addition, evaluation of Δ or less has a problem in use.
【０１９】（３）耐食性 塗装鋼板を２Ｔ折り曲げした後、ＪＩＳ Ｚ ２３７１
に準じて２０００時間実施し、◎（異状なし）→○→△
→×（全面に塗膜割れや塗膜剥離発生）で評価した。(3) Corrosion resistance After the coated steel sheet was bent for 2T, JIS Z2371 was used.
Performed for 2000 hours according to the procedure ◎ (no abnormality) → ○ → △
→ X (coating cracking or coating peeling on the entire surface) was evaluated.
【０２０】（４）耐候性 塗装鋼板を２Ｔ折り曲げした後、サンシャインウェザメ
−タ−で２０００時間実施し、◎（異状なし）→○→△
→×（全面に塗膜割れや塗膜剥離発生）で評価した。(4) Weather resistance After the coated steel sheet was bent by 2T, it was subjected to 2,000 hours with a sunshine weather meter, and ◎ (no abnormality) → ○ → △
→ X (coating cracking or coating peeling on the entire surface) was evaluated.
【０２１】[0211]
【第１表】 [Table 1]
【０２２】[0222]
【第２表】 [Table 2]
【０２３】[0233]
【発明の効果】以上のように、本発明の製造方法によれ
ば、クロメ−ト皮膜による着色の少ない透明フッ素樹脂
被覆ステンレス鋼板を製造することができる。As described above, according to the manufacturing method of the present invention, it is possible to manufacture a transparent fluororesin-coated stainless steel sheet with little coloring due to the chromate film.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ３２Ｂ 27/30 Ｄ 8115−4Ｆ (72)発明者 畑野 憲文 東京都中央区日本橋１丁目15番１号 日本 パ−カライジング株式会社内 (72)発明者 大山 和幸 東京都中央区日本橋１丁目15番１号 日本 パ−カライジング株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location B32B 27/30 D 8115-4F (72) Inventor Kenfumi Hatano 1-15-1 Nihonbashi, Chuo-ku, Tokyo No. Japan Parkerizing Co., Ltd. (72) Inventor Kazuyuki Oyama 1-15-1 Nihonbashi, Chuo-ku, Tokyo Inside Japan Parkerizing Co., Ltd.
Claims (2)
鋼板に全クロムイオンとして１〜４０ｇ／ｌとリン酸イ
オンとを含み、３価クロムイオン／６価クロムイオンの
重量比が０.６〜２.０、リン酸イオン／全クロムイオン
の重量比が０.５〜２.０であるクロメート処理液を金属
クロム換算で５〜４０ｍｇ／ｍ2塗布して、水洗するこ
となく乾燥した後、透明フッ素樹脂塗料を塗装し、乾燥
することを特徴とする透明フッ素樹脂被覆ステンレス鋼
板の製造方法。1. A stainless steel sheet which has been subjected to a phosphate treatment in advance contains 1 to 40 g / l as total chromium ions and phosphate ions, and has a weight ratio of trivalent chromium ions / hexavalent chromium ions of 0.6 to. After applying a chromate treatment liquid having a weight ratio of 2.0 and a phosphate ion / total chromium ion of 0.5 to 2.0 in an amount of 5 to 40 mg / m 2 in terms of metallic chromium, and drying without washing with water, A method for producing a transparent fluororesin-coated stainless steel sheet, which comprises coating a transparent fluororesin paint and drying.
ート処理液として、組成が全クロムイオンとして１〜４
０ｇ／ｌ、リン酸イオンおよびシリカを含み、３価クロ
ムイオン／６価クロムイオンの重量比が０.６〜２.０、
リン酸イオン／全クロムイオンの重量比が０.５〜２.
０、シリカ／全クロムイオンの重量比が０.１〜４.０で
あるものを用いることを特徴とする透明フッ素樹脂被覆
ステンレス鋼板の製造方法。2. The method according to claim 1, wherein the chromate treatment liquid has a composition of 1 to 4 as total chromium ions.
0 g / l, including phosphate ion and silica, and a weight ratio of trivalent chromium ion / hexavalent chromium ion of 0.6 to 2.0,
The weight ratio of phosphate ion / total chromium ion is 0.5 to 2.
A method for producing a transparent fluororesin-coated stainless steel sheet, wherein the weight ratio of silica / total chromium ions is 0.1 to 4.0 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29367191A JP2839971B2 (en) | 1991-10-14 | 1991-10-14 | Method for manufacturing transparent fluororesin-coated stainless steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29367191A JP2839971B2 (en) | 1991-10-14 | 1991-10-14 | Method for manufacturing transparent fluororesin-coated stainless steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05106057A true JPH05106057A (en) | 1993-04-27 |
| JP2839971B2 JP2839971B2 (en) | 1998-12-24 |
Family
ID=17797735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29367191A Expired - Fee Related JP2839971B2 (en) | 1991-10-14 | 1991-10-14 | Method for manufacturing transparent fluororesin-coated stainless steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2839971B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013023706A (en) * | 2011-07-15 | 2013-02-04 | Nippon Parkerizing Co Ltd | Agent of treating metal surface, and metallic material treated with the same |
| JP2017106300A (en) * | 2015-12-07 | 2017-06-15 | Ｊｆｅエンジニアリング株式会社 | Self-lift type water area platform and gripping tool for use in the same as well as construction method of water area structure |
-
1991
- 1991-10-14 JP JP29367191A patent/JP2839971B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013023706A (en) * | 2011-07-15 | 2013-02-04 | Nippon Parkerizing Co Ltd | Agent of treating metal surface, and metallic material treated with the same |
| JP2017106300A (en) * | 2015-12-07 | 2017-06-15 | Ｊｆｅエンジニアリング株式会社 | Self-lift type water area platform and gripping tool for use in the same as well as construction method of water area structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2839971B2 (en) | 1998-12-24 |
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