JPH0820888A - Transparent resin film coating plated steel sheet excellent in brightness and working corrosion resistance - Google Patents
Transparent resin film coating plated steel sheet excellent in brightness and working corrosion resistanceInfo
- Publication number
- JPH0820888A JPH0820888A JP18039794A JP18039794A JPH0820888A JP H0820888 A JPH0820888 A JP H0820888A JP 18039794 A JP18039794 A JP 18039794A JP 18039794 A JP18039794 A JP 18039794A JP H0820888 A JPH0820888 A JP H0820888A
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- JP
- Japan
- Prior art keywords
- resin film
- transparent resin
- plating
- steel sheet
- bright
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属クロムの光沢性と
加工耐食性に優れた透明樹脂フイルム被覆めっき鋼板に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent resin film-coated plated steel sheet which is excellent in glossiness and corrosion resistance of metallic chromium.
【０００２】[0002]
【従来の技術】金属クロムの被膜はその優れた光沢性の
ため屋内裸用途に数多く使用されているが、加工後めっ
きされる装飾クロムめっき品とステンレス鋼板が主で、
プレめっきのクロムめっき鋼板はほとんど見受けられな
い。これはクロムめっき被膜は下地に銅めっきやニッケ
ルめっきを施すことにより硬質で光沢性、耐傷付性や耐
食性に優れた被膜が得られるが、金属クロム自体硬く、
加工性に劣るためめっき後成形されるプレめっき鋼板に
適さないからである。2. Description of the Related Art Metallic chrome coatings are widely used for indoor naked applications due to their excellent luster, but they are mainly decorative chrome plated products and stainless steel plates that are plated after processing.
Almost no pre-plated chrome-plated steel sheet is found. This is because the chrome plating film is hard by applying copper plating or nickel plating to the base and has excellent glossiness, scratch resistance and corrosion resistance, but the metal chrome itself is hard,
This is because it is not suitable for a pre-plated steel sheet formed after plating due to poor workability.
【０００３】この欠点である加工耐食性を向上させるた
めに、めっきと熱拡散とを組み合わせた公開特許が、種
々開示されている。例えば、（１）特開昭６１ー７６６
６０は鋼板表面にニッケルで２〜１０μｍの厚さに被覆
した後、クロムを１〜１０μｍの厚さにめっきした鋼板
を８００〜１２００℃の温度で熱処理することにより耐
食性の優れた鋼板を得ている。また、（２）特開昭６１
−７９７５８では真空槽内でニッケルとクロムを続けて
蒸着、またはスパッタリング方法で、例えば厚さ１０μ
ｍのニッケル層と厚さ２３μｍのクロム層を付着させた
後、更に合金化処理炉にてニッケルとクロムを地鉄に拡
散させて、Ｎｉ−Ｃｒ合金層を形成させた部分にステン
レスに劣らない光沢度のものを得ている。しかし、
（１）の方法の如く表面がクロムめっき層である鋼板を
一般的な保護ガス中で拡散処理した場合、Ｃｒの酸素親
和力が大きいためＣｒの酸化を抑止することは困難で変
色する。したがってこの酸化被膜を除去する必要があ
る。またいずれの方法もクロム厚さが２μｍ以上付着さ
せており、鋼板のめっきとしては長いめっき槽を要し経
済的でないという欠点を有している。In order to improve the working corrosion resistance, which is the drawback, various patents have been disclosed that combine plating and heat diffusion. For example, (1) JP-A-61-766
60 is a steel plate surface coated with nickel to a thickness of 2 to 10 μm, and then a steel plate plated with chromium to a thickness of 1 to 10 μm is heat-treated at a temperature of 800 to 1200 ° C. to obtain a steel plate having excellent corrosion resistance. There is. In addition, (2) JP-A-61
In the case of -79758, nickel and chromium are continuously vapor-deposited or sputtered in a vacuum chamber, for example, with a thickness of 10 μm.
m nickel layer and 23 μm thick chromium layer are adhered, and then nickel and chromium are further diffused in the base iron in an alloying treatment furnace so that the Ni-Cr alloy layer-formed portion is not inferior to stainless steel. You are getting glossy. But,
When a steel plate having a chromium plating layer on the surface is subjected to diffusion treatment in a general protective gas as in the method (1), it is difficult to suppress the oxidation of Cr because the oxygen affinity of Cr is large, and discoloration occurs. Therefore, it is necessary to remove this oxide film. In addition, each method has a drawback that the thickness of chromium is 2 μm or more, and a long plating tank is required for plating a steel sheet, which is not economical.
【０００４】また、（３）特開平５−２９４９１１では
ニッケルめっき後、熱拡散し、さらに光沢ニッケルと光
沢クロムの２層めっきを行うことにより光沢性と耐食性
に優れたクロムめっき鋼板を得ている。この方法はめっ
き被膜量は少なく安価であるが、板厚が厚く加工歪みが
大きい用途は表層にクラックが入り易く、このクラック
により耐食性が低下するため、結果的に板厚が薄い鋼板
に較べ、厚い鋼板は拡散前のニッケルを多く付着させね
ばならず経済的でないという欠点を有している。(3) In Japanese Patent Laid-Open No. 5-294911, nickel-plated, heat-diffused, and further double-layer plated with bright nickel and bright chrome to obtain a chrome-plated steel sheet excellent in gloss and corrosion resistance. . This method has a small amount of plating film and is inexpensive, but in applications where the plate thickness is large and the processing strain is large, cracks are likely to occur in the surface layer, and the corrosion resistance decreases due to the cracks, resulting in a plate thickness thinner than a steel plate, Thick steel plates have the drawback of being uneconomical because they must deposit a large amount of nickel before diffusion.
【０００５】さらにめっき鋼板やステンレス鋼板に樹脂
被膜塗布や樹脂フイルムの被覆する公開特許も種々開示
されている。例えば（４）特開昭６３−７２３７９では
ステンレス鋼材の表面に透明な樹脂層を設けた後、さら
に該樹脂表面に親水性モノマー層を設けて、放射線同時
照射法によりグラフト重合させることを特徴とする指紋
付着防止性に優れた表面処理ステンレス鋼材の製造方法
が開示されている。しかし、この方法は苛酷な腐食環境
下で使用される用途を目的として開発されたもので、後
者は使用原板がステンレスで、かつ、樹脂被膜層および
その処理のためのコストが高価であり、経済的でないと
いう欠点を有している。Further, various open patents for coating a resin film on a plated steel plate or a stainless steel plate or coating a resin film have been disclosed. For example, (4) JP-A-63-72379 is characterized in that after a transparent resin layer is provided on the surface of a stainless steel material, a hydrophilic monomer layer is further provided on the resin surface, and graft polymerization is performed by a simultaneous irradiation method. There is disclosed a method for producing a surface-treated stainless steel material having excellent anti-fingerprint property. However, this method was developed for the purpose of being used in a harsh corrosive environment.The latter uses stainless steel as the original plate, and the cost for the resin coating layer and its treatment is high, which is economical. It has the disadvantage that it is not suitable.
【０００６】また、めっき鋼板に樹脂フイルムを被覆す
ることにより耐食性を付与し、かつ金属そのものの感じ
をだすことを目的として（５）特開昭５３ー８８０７７
が開示されている。これは厚さ１〜３０μｍの錫メッ
キ、ニッケルメッキ、クロムメッキ等の白輝性メッキ層
上に、透明接着剤を介して、厚さ１５〜１００μｍのア
クリル、ポリフッ化ビニルや塩化ビニルの透明樹脂フイ
ルムを積層するもので、表層の透明樹脂フイルムにエン
ボスやスクラッチ模様を入れることにより下地の白輝性
めっきとあいまって、さらに意匠性のある透明樹脂フイ
ルム被覆鋼板を得ている。しかし、通常使用される表面
粗さのめっき原板を使用した場合、この方法により得ら
れる被膜の外観は白輝性はあるものの光沢性のあるめっ
き被膜は得られない。またクロムめっきの場合、厚さ１
μｍのクロムめっきでも、クロムめっきの陰極電解析出
効率が低いため長い電解めっき槽を要し経済的でないと
いう欠点を有している。Further, for the purpose of providing corrosion resistance by coating a plated steel sheet with a resin film and giving a feeling of the metal itself (5) JP-A-53-88077.
Is disclosed. This is a transparent resin such as acrylic, polyvinyl fluoride or vinyl chloride having a thickness of 15 to 100 μm through a transparent adhesive on a bright plating layer having a thickness of 1 to 30 μm such as tin plating, nickel plating or chrome plating. Films are laminated, and by embossing or scratching the transparent resin film on the surface layer, together with the bright white plating of the base, a transparent resin film-coated steel sheet with a further design is obtained. However, when a plating base plate having a surface roughness that is usually used is used, a glossy plating film cannot be obtained although the appearance of the film obtained by this method is whitish. For chrome plating, thickness 1
Even the chrome plating of μm has a drawback that it requires a long electrolytic plating bath because of low cathode electrolytic deposition efficiency of chrome plating and is not economical.
【０００７】[0007]
【発明が解決しようとする課題】本発明は安価で少なく
とも片面は光沢クロムの光沢性を有する加工耐食性に優
れた透明樹脂フイルム被覆めっき鋼板を提供することに
ある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a transparent resin film-coated plated steel sheet which is inexpensive and has a glossy chrome on at least one side and which is excellent in processing corrosion resistance.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するため
原板の粗度、光沢ニッケルめっき、光沢クロムめっきお
よび透明樹脂フイルム被膜条件が意匠性に及ぼす影響に
ついて種々研究した結果、原板粗さは光沢性のためには
小さいほど好ましいが、コイル搬送時の表面への疵付き
性や生産性の点で不経済となるため、原板に直接クロム
めっきを施す場合は原板表面の中心線平均粗さを０．１
μｍ以下、かつ最大粗さを１μｍ以下とする。さらに、
光沢の優れた表面にするために、ニッケルとクロムの２
層めっきを施す場合は原板の中心線平均粗さ０．２μｍ
以下である低炭素鋼板を使用する。上述の規定された表
面粗さのめっき原板を使用し直接または下地として厚さ
１〜３μｍの光沢ニッケルめっきを介して金属Ｃｒ量で
５０〜３００ｍｇ／ｍ2（比重を７．１とした場合、厚
さ０．００７０〜０．０４２μｍに相当する。）の光沢
クロムめっきを行い、さらに上層にクロメート処理を施
すことなく、直接ポリエステル樹脂、ポリエチレン樹
脂、ポリプロピレン樹脂やフッ素樹脂などの透明樹脂フ
イルムを、または接着剤層を介してこれらのフイルムを
被覆し、約１５０〜３００℃で焼き付けることにより金
属クロムの光沢を有し、加工耐食性に優れた安価な透明
樹脂フイルム被覆めっき鋼板が得られることを見いだし
た。[Means for Solving the Problems] In order to solve the above problems, as a result of various studies on the influence of the roughness of the original plate, the bright nickel plating, the bright chrome plating, and the transparent resin film coating condition on the design, the original plate roughness is The smaller the size, the more preferable it is, but it is uneconomical in terms of scratches on the surface during coil transfer and productivity, so when performing direct chrome plating on the original plate, use the center line average roughness of the original plate surface. 0.1
The maximum roughness is 1 μm or less and the maximum roughness is 1 μm or less. further,
2 for nickel and chrome for a bright surface
When layer plating is applied, the center line average roughness of the original plate is 0.2 μm
The following low carbon steel sheets are used. The amount of metallic Cr is 50 to 300 mg / m 2 (when the specific gravity is 7.1, using the plating original plate having the above-described surface roughness directly or through the bright nickel plating having a thickness of 1 to 3 μm as a base. A transparent resin film such as polyester resin, polyethylene resin, polypropylene resin or fluororesin is directly applied to the upper layer without chromate treatment. It was also found that an inexpensive transparent resin film-coated plated steel sheet having a gloss of metallic chromium and excellent in process corrosion resistance can be obtained by coating these films via an adhesive layer and baking at about 150 to 300 ° C. It was
【０００９】以下、本発明について詳細に説明する。The present invention will be described in detail below.
【００１０】本発明において使用される原板は一般に使
用されている低炭素鋼で焼鈍・調質圧延を行ったフルフ
ィニッシュ仕上げの板厚０．１〜１．５ｍｍ、中心線平
均粗さ０．１μｍ、かつ最大粗さが１μｍ以下または中
心線平均粗さ０．２μｍ以下の冷延鋼板である。原板板
厚は厚いほど、折曲げ加工時の部分的な加工歪みに伴う
光沢や耐食性の劣化が大きいので１．５ｍｍ以下、好ま
しくは１．０ｍｍ以下である。また、原板の表面粗度は
製品の意匠性に大きな影響を与えるが、特に下地に光沢
ニッケルを施さない場合、光沢クロムめっきによる光沢
性向上に効果がある中心線平均粗さで０．１μｍ以下か
つ最大粗さが１μｍ以下が好ましい。下地めっきとして
光沢ニッケルを施す場合は原板の中心線平均粗さが０．
２μｍ以下とするが、より好ましくは中心線平均粗さ
０．１μｍ以下の冷延鋼板である。The original plate used in the present invention is a commonly used low carbon steel and has a fully finished plate thickness of 0.1 to 1.5 mm which is annealed and temper rolled, and a center line average roughness of 0.1 μm. The maximum roughness is 1 μm or less or the center line average roughness is 0.2 μm or less. The thicker the original plate is, the greater the deterioration in gloss and corrosion resistance due to partial processing strain during bending, so it is 1.5 mm or less, preferably 1.0 mm or less. Also, the surface roughness of the original plate has a great influence on the design of the product, but especially when the base is not coated with bright nickel, it has the effect of improving the gloss by bright chrome plating. Moreover, the maximum roughness is preferably 1 μm or less. When bright nickel is applied as the undercoat, the center line average roughness of the original plate is 0.
The thickness is 2 μm or less, and more preferably a cold rolled steel sheet having a center line average roughness of 0.1 μm or less.
【００１１】図１は低炭素鋼板上に、光沢ニッケルめっ
きを施すことなく、めっき量２００ｍｇ／ｍ2の光沢ク
ロムめっきを直接行った場合の表面光沢に及ぼす原板粗
さの影響を記したものである。光沢度は日本電色（株）
製光沢計“ＶＧ−２ＰＤ”（反射角度：２０゜）で測定
した値であるが原板の平均粗さが０．１μｍを越えると
めっきしても光沢度の高い被膜が得られない。原板粗さ
は光沢性のためには小さいほど好ましいが、０．０３μ
ｍ以下であるとコイル搬送時の表面への疵付き性や生産
性の点で不経済である。FIG. 1 shows the influence of the original plate roughness on the surface gloss when a low-carbon steel plate is directly plated with bright chrome with a plating amount of 200 mg / m 2 without applying bright nickel plating. is there. The gloss level is Nippon Denshoku Co., Ltd.
It is a value measured by a gloss meter “VG-2PD” (reflection angle: 20 °), but if the average roughness of the original plate exceeds 0.1 μm, a coating with high gloss cannot be obtained even if plated. The smaller the original plate roughness is, the better for glossiness, but 0.03μ
If it is m or less, it is uneconomical in terms of scratching the surface of the coil during conveyance and productivity.
【００１２】また、原板の上に光沢ニッケルめっきと光
沢クロムめっきの２層めっきを施す場合においても、原
板の平均粗さが０．２μｍ以上であると光沢ニッケルめ
っきを行っても目的とする光沢性のある鋼板が得られな
い。従って原板の中心線平均粗さは０．２μｍ以下、好
ましくはニッケルめっきを施さないめっき原板と同じく
０．１０μｍ以下のものが推奨される。Further, even when two-layer plating of bright nickel plating and bright chrome plating is performed on the original plate, if the average roughness of the original plate is 0.2 μm or more, the desired gloss will be obtained even if the bright nickel plating is performed. Steel sheet with good properties cannot be obtained. Therefore, it is recommended that the center line average roughness of the original plate be 0.2 μm or less, and preferably 0.10 μm or less, which is the same as that of the plated original plate not plated with nickel.
【００１３】下地として光沢ニッケルめっきを施す場合
は一般的なワット浴やスルファミン酸浴、その他いずれ
の光沢ニッケルめっき浴を用いてもよいが、厚さ１〜３
μｍめっきする。光沢ニッケルめっきのめっき厚が光沢
に及ぼす影響は添加する光沢剤の種類と量により異なる
が一般的に１μｍ以下であると所定の光沢が得られな
い。また３μｍ以上付着させてもその効果は飽和し不経
済であるので１〜３μｍの範囲とする。When bright nickel plating is applied as the base, a general Watt bath, a sulfamic acid bath, or any other bright nickel plating bath may be used, but the thickness is 1 to 3.
μm plating. The effect of the thickness of the bright nickel plating on the gloss varies depending on the type and amount of the brightening agent to be added, but if it is 1 μm or less, the desired gloss cannot be obtained. Further, even if it is adhered to a thickness of 3 μm or more, the effect is saturated and it is uneconomical, so the range is 1 to 3 μm.
【００１４】光沢のあるめっき原板または下地として光
沢ニッケルめっきしためっき鋼板の片面または両面に電
解クロムめっきを施すが、表１の原板サンプルＮｏ．２
をめっき原板とした場合のクロムめっき量が光沢に及ぼ
す影響を図２に示す。クロムめっき量は５０〜３００ｍ
ｇ／ｍ2が好ましい。５０ｍｇ／ｍ2以下では光沢クロム
としての光沢性が確保できず、また３００ｍｇ／ｍ2以
上では光沢度に及ぼす効果が飽和に達し、またストリッ
プ状でのめっきとして生産性が低下し経済的でないから
である。より好ましくは光沢があり、かつ経済的な１０
０〜２００ｍｇ／ｍ2である。この光沢クロムめっき条
件については特に規定されるものでなく、一般に用いら
れているＴＦＳ（ティンフリースチール）用のめっき浴
やサージェント浴を用いることができる。クロムオキサ
イドはクロムの酸素親和力が強いため必然的に生成し、
この被膜は耐食性向上に寄与するが過剰であると光沢を
劣化させるので３０ｍｇ／ｍ2以下、好ましくは２０ｍ
ｇ／ｍ2以下である。Electrolytic chrome plating is applied to one or both sides of a bright plated original plate or a plated steel plate plated with bright nickel as a base. Two
Fig. 2 shows the effect of the amount of chromium plating on the gloss when using as a plating base plate. Chromium plating amount is 50-300m
g / m 2 is preferred. When the amount is 50 mg / m 2 or less, the glossiness as glossy chrome cannot be secured, and when the amount is 300 mg / m 2 or more, the effect on the glossiness reaches a saturation level, and the productivity as strip plating is reduced, which is not economical. Is. More preferably glossy and economical 10
It is 0 to 200 mg / m 2 . The bright chrome plating conditions are not particularly specified, and a commonly used TFS (tin-free steel) plating bath or a Sargent bath can be used. Chromium oxide is inevitably generated because chromium has a strong oxygen affinity.
This coating contributes to the improvement of corrosion resistance, but if it is excessive, it deteriorates the gloss, so it is 30 mg / m 2 or less, preferably 20 m.
g / m 2 or less.
【００１５】上述の表面処理した鋼板に一般的に用いら
れるクロメート処理やリン酸処理を施すことなく、熱可
塑性の性質を有する厚さ１０〜５０μｍのポリエステ
ル、ポリエチレンやフッ化エチレンなどの単層の透明樹
脂フイルム、またはこの樹脂フイルムより低融点の接着
剤層を有する透明樹脂フイルムを被覆した後、この鋼板
を１００〜３００℃に加熱し、フイルムを熱融着させ
る。Without subjecting the above-mentioned surface-treated steel sheet to chromate treatment or phosphoric acid treatment generally used, a single layer of polyester, polyethylene or fluorinated ethylene having a thermoplastic property and a thickness of 10 to 50 μm is used. After coating a transparent resin film or a transparent resin film having an adhesive layer having a melting point lower than that of the resin film, the steel sheet is heated to 100 to 300 ° C. to heat-bond the film.
【００１６】フイルムの厚さを規定した理由は１０μｍ
以下であるとコイル被覆ラインにおいて、経済的速度で
均一に被覆することが困難となり、また５０μｍ以上に
なると経済的でなくなるとともに透明フイルムといえど
も光沢度が低下するからである。The reason for defining the film thickness is 10 μm.
This is because if it is below, it becomes difficult to coat the coil coating line uniformly at an economical rate, and if it is 50 μm or more, it is not economical and the glossiness of the transparent film is lowered.
【００１７】[0017]
【実施例】以下、本発明の実施例について詳細に説明す
る。EXAMPLES Examples of the present invention will be described in detail below.
【００１８】実施例１ 表１に示す表面粗度が異なる３種類の板厚０．４ｍｍの
低炭素鋼板を供試材としてアルカリ脱脂及び硫酸酸洗に
よる清浄化処理と活性化処理を施した後、下記低濃度の
クロムめっき浴にてめっきした２００ｍｇ／ｍ2の光沢
クロムめっき鋼板を被覆処理原板として、表２に示す８
種類の透明フイルム樹脂を被覆し、さらに板温を１５０
〜３００℃に加熱し、熱融着させた。これらの特性評価
はフイルムの密着性、光沢度と耐食性で評価した。その
評価方法と結果を下記および表３に示すが、色調はステ
ンレスに類似し、光沢性と加工耐食性に優れた樹脂フイ
ルム被覆めっき鋼板が得られた。Example 1 Three types of low carbon steel sheets having a thickness of 0.4 mm and having different surface roughness shown in Table 1 were used as test materials, after being subjected to cleaning treatment and activation treatment by alkali degreasing and sulfuric acid pickling. Table 2 shows 200 mg / m 2 of bright chrome-plated steel plate plated with the following low-concentration chrome plating bath as the coating original plate.
It is coated with various types of transparent film resin, and the plate temperature is 150
It was heated to ˜300 ° C. and thermally fused. These characteristics were evaluated by the film adhesion, glossiness and corrosion resistance. The evaluation method and the results are shown below and in Table 3, and a resin film-coated plated steel sheet having a color tone similar to that of stainless steel and excellent in gloss and work corrosion resistance was obtained.
【００１９】なお、比較例９はクロムめっき鋼板に透明
樹脂フイルムの被覆を施さないもの、また比較例１０は
フイルム被覆後の加熱温度が低い場合で、前者は耐食
性、後者は密着性が劣った。比較例１１と１２は原板表
面の最大粗さが規定した値より高い、特に比較例１２は
通常ブリキ用などのめっき原板として使用されているも
のでいずれも光沢度が劣った。In Comparative Example 9, the chrome-plated steel sheet was not coated with the transparent resin film, and in Comparative Example 10, the heating temperature after coating the film was low. The former was inferior in corrosion resistance and the latter was inferior in adhesion. . In Comparative Examples 11 and 12, the maximum roughness of the surface of the original plate is higher than the specified value. Particularly, Comparative Example 12 is used as a plating original plate for tinplate and the like, and the glossiness is poor.
【００２０】[0020]
【表１】 [Table 1]
【００２１】クロムめっき条件 めっき浴組成 無水クロム酸 ：１００ｇ／ｌ 硫酸 ：０．４ｇ／ｌ ホウフッ化水素酸：０．４ｇ／ｌ 電解条件 ＰＨ ：０．１ 温度 ：５０℃ 電流密度：６０Ａ／ｄｍ2 Chromium plating conditions Plating bath composition Chromic anhydride: 100 g / l Sulfuric acid: 0.4 g / l Borofluoric acid: 0.4 g / l Electrolysis conditions PH: 0.1 Temperature: 50 ° C. Current density: 60 A / dm 2
【００２２】[0022]
【表２】 [Table 2]
【００２３】フイルム密着強度試験 樹脂フイルム積層鋼板のフイルムにカッターナイフを用
いて素地に達するまで１ｍｍ間隔の碁盤目の疵を入れ、
次いで碁盤目模様の中心にエリクセン試験機で６ｍｍの
張り出しを行い、セロテープを用いて碁盤目張り出し部
のフイルムの剥離状態を観察した。 判定 「◎」：剥離なし 「△」：クロス部の一部が剥離 「×」：１ｍｍ各の１個以上が剥離Film adhesion strength test Using a cutter knife, a film of resin film laminated steel sheet is provided with a checkerboard pattern of 1 mm intervals until it reaches the substrate.
Then, the Erichsen tester was used to project 6 mm at the center of the cross-cut pattern, and the peeled state of the film at the cross-cut projection was observed using cellophane tape. Judgment "◎": No peeling "△": Part of the cross part peeled "x": 1 mm or more peeled for each 1 mm
【００２４】光沢度評価方法：日本電色（株）製 光
沢計“ＶＧ−２ＰＤ”（反射角度：２０゜）光沢度を測
定し、結果を「◎」「○」「△」「×」で表示した。そ
の意味するところは下記に準じた。 「◎」：光沢度； ９０１以上 「○」：光沢度； ７０１〜９００ 「△」：光沢度； ５０１〜７００ 「×」：光沢度； ５００以下Glossiness evaluation method: manufactured by Nippon Denshoku Co., Ltd. Glossmeter "VG-2PD" (reflection angle: 20 °) Glossiness was measured, and the results were indicated by "◎", "○", "△", "×". displayed. The meaning is based on the following. "A": glossiness; 901 or more "O": glossiness; 701-900 "△": glossiness; 501-700 "X": glossiness; 500 or less
【００２５】耐食性評価方法 樹脂フイルムを被覆（一部はクロムめっきのみ）した鋼
板を １）大きさ５ｘ１２ｃｍのサンプルを内側曲げ半径１ｍ
ｍで９０度折曲げ加工したもの ２）ブランク径８８ｍｍ、絞り比 ２で成形したカップ
状のもの の２種類のサンプルを塩水噴霧試験（ＪＩＳ Ｚ２３７
１）に供した。評価は未加工部を除いて、塩水噴霧７２
時間後の赤錆発生面積比を測定し、結果を「◎」「○」
「△」「×」で表示した。その意味するところは下記に
準じた。 「◎」：０ 〜０.０２％未満［耐食性；優］ 「○」：０.０２〜０.０５％未満 「△」：０.０５〜０.１％未満 「×」：０.１％以上 ［耐食性；劣］Evaluation Method of Corrosion Resistance A steel sheet coated with a resin film (a part of which is only chrome plating) 1) A sample having a size of 5 × 12 cm has an inner bending radius of 1 m.
90 degree bending at 90 m 2) Two types of samples, a cup-shaped one formed with a blank diameter of 88 mm and a drawing ratio of 2, were subjected to a salt spray test (JIS Z237).
It was subjected to 1). The evaluation is salt spray 72 excluding the unprocessed part.
Measure the area ratio of red rust generated after hours
Displayed with "△" and "×". The meaning is based on the following. "◎": 0 to less than 0.02% [corrosion resistance; excellent] "○": 0.02 to less than 0.05% "△": less than 0.05 to 0.1% "x": 0.1% Above [corrosion resistance; inferior]
【００２６】[0026]
【表３】 [Table 3]
【００２７】実施例２ 表４に示す４種類の低炭素鋼板を供試材としてアルカリ
脱脂および硫酸酸洗による清浄化処理と活性化処理を施
した後、下記ワット浴にて１．５μｍの光沢ニッケルめ
っきを行い、さらに水洗後、乾燥することなく実施例１
で記した条件で付着量１００〜２００ｍｇ／ｍ2の光沢
クロムめっきを行った。このめっき鋼板に厚さ１６μｍ
のポリエステル樹脂フイルムを被覆した後、板温を２４
０℃に加熱し、被覆したフイルムに密着性を付与した。
フイルム被覆めっき鋼板の特性評価は密着性、光沢度と
耐食性で評価し、その結果を表５に示す。めっき原板の
板厚が厚いほど９０度折曲げ加工部のフイルムの伸び率
は大きくなるが塩水噴霧試験７２時間ではいずれのサン
プルも錆の発生は認められなかった。実施例５は光沢ニ
ッケルに直接、透明樹脂フイルム被覆をしたもので外観
は金属クロムのごとき白輝性ではないが黄味がかった光
沢のものが得られた。比較例６は光沢ニッケルと光沢ク
ロムめっきは実施例と同様に処理したが透明樹脂フイル
ムを被覆しない、また、比較例７は厚さ３μｍの無光沢
ニッケルめっき後、非酸化性雰囲気中で５５０℃、５時
間熱拡散し、さらに厚さ１．５μｍの光沢ニッケルめっ
きと光沢クロムめっきを実施例と同様に処理したが、め
っき原板が厚く、加工により、めっき層にクラックが生
じ、透明樹脂フイルム被覆をしていないため加工部の耐
食性が劣った。Example 2 Four types of low carbon steel sheets shown in Table 4 were used as test materials, subjected to cleaning treatment and activation treatment by alkaline degreasing and sulfuric acid pickling, and then a gloss of 1.5 μm in the Watt bath described below. Example 1 after nickel plating and further washing with water without drying
Under the conditions described in (1), bright chromium plating with an adhesion amount of 100 to 200 mg / m 2 was performed. This plated steel sheet has a thickness of 16 μm
After coating the polyester resin film of
The coated film was heated to 0 ° C. to provide adhesion.
The characteristics of the film-coated plated steel sheet were evaluated by adhesion, glossiness and corrosion resistance, and the results are shown in Table 5. The thicker the plating original plate, the greater the elongation of the film in the 90 ° bent portion, but no rust was found in any of the samples in the salt spray test 72 hours. In Example 5, bright nickel was directly coated with a transparent resin film, and a yellowish luster was obtained although the appearance was not white, such as metallic chromium. In Comparative Example 6, bright nickel and bright chrome plating were treated in the same manner as in Example, but the transparent resin film was not coated, and in Comparative Example 7, 3 μm thick matte nickel plating was performed, and then at 550 ° C. in a non-oxidizing atmosphere. Heat diffusion was performed for 5 hours, and bright nickel plating having a thickness of 1.5 μm and bright chrome plating were treated in the same manner as in the example, but the plating base plate was thick and cracked in the plating layer due to processing, resulting in transparent resin film coating. The corrosion resistance of the processed part was inferior because it was not processed.
【００２８】[0028]
【表４】 [Table 4]
【００２９】光沢ニッケルめっき条件 ワット浴組成 硫酸ニッケル：２４０ ｇ／ｌ 塩化ニッケル： ４５ ｇ／ｌ ほう酸 ： ３０ ｇ／ｌ 光沢剤 ： 添加 電解条件 ＰＨ ：４．３ 温度 ：５０℃ 電流密度：６ Ａ／ｄｍ2 Bright nickel plating conditions Watt bath composition Nickel sulfate: 240 g / l Nickel chloride: 45 g / l Boric acid: 30 g / l Brightening agent: Addition Electrolysis conditions PH: 4.3 Temperature: 50 ° C. Current density: 6 A / Dm 2
【００３０】使用樹脂フイルム １）帝人（株）製 厚さ：１６μｍのポリエステル樹脂
フイルムResin film used 1) Teijin Ltd. thickness: 16 μm polyester resin film
【００３１】評価方法 フイルム密着試験、光沢度；実施例１に準じた。耐食性
の評価は９０度折曲げと平板部（未加工部）で行った
が、その評価方法は実施例１に準じた。Evaluation method Film adhesion test, glossiness: Same as in Example 1. The corrosion resistance was evaluated by bending at 90 degrees and the flat plate portion (unprocessed portion), and the evaluation method was in accordance with Example 1.
【００３２】[0032]
【表５】 [Table 5]
【００３３】[0033]
【発明の効果】原板表面の粗さを規定した低炭素鋼板の
表面に直接、または下地として光沢ニッケルめっきを施
した表面に光沢クロムと透明樹脂フイルムを被覆した鋼
板は安価で光沢性と加工耐食性に優れ、屋内裸用鋼板と
して用いることができる。[Effects of the Invention] A low carbon steel plate whose surface roughness is regulated directly or on a surface coated with a bright nickel plating as a base is coated with bright chrome and a transparent resin film. It can be used as an indoor bare steel plate.
【００３４】[0034]
【図１】光沢クロムめっき後の光沢に及ぼすめっき原板
の中心線平均粗さの影響を示す図面である。FIG. 1 is a drawing showing the influence of the center line average roughness of an original plating plate on the gloss after bright chrome plating.
【図２】表面光沢に及ぼす光沢クロムめっき厚さの影響
を示す図面である。FIG. 2 is a drawing showing the effect of the thickness of bright chrome plating on surface gloss.
Claims (4)
以下、かつ最大粗さが１μｍ以下である低炭素鋼板の表
面に金属Ｃｒ量で５０〜３００ｍｇ／ｍ2の光沢クロム
めっき層と、さらにそのめっき表面の片面もしくは両面
に熱可塑性を有する厚さ１０〜５０μｍの透明樹脂フイ
ルムを熱融着させた光沢性と加工耐食性に優れた透明樹
脂フイルム被覆めっき鋼板。1. The average roughness of the plating base plate surface is 0.1 μm.
A bright chromium plating layer having a metal Cr content of 50 to 300 mg / m 2 on the surface of a low carbon steel sheet having a maximum roughness of 1 μm or less, and a thermoplastic thickness 10 on one or both surfaces of the plating surface. A transparent resin film-coated plated steel sheet having excellent gloss and processing corrosion resistance obtained by heat-sealing a transparent resin film having a thickness of up to 50 μm.
このフイルムまたはこの樹脂フイルムより融点の低い接
着層を塗布した接着剤付きフイルムを熱融着することに
より光沢性と加工耐食性に優れた透明樹脂フイルム被覆
めっき鋼板の製造方法。2. The transparent resin film according to claim 1, wherein
A method for producing a transparent resin film-coated plated steel sheet excellent in glossiness and processing corrosion resistance by heat-sealing this film or a film with an adhesive coated with an adhesive layer having a lower melting point than that of this resin film.
である低炭素鋼板の表面に光沢ニッケルめっきとそのニ
ッケルめっき表面の片面もしくは両面に金属Ｃｒ量で５
０ｍｇ〜３００ｍｇ／ｍ2の光沢クロムめっき層、さら
にその光沢クロムめっき表面の片面もしくは両面に熱可
塑性を有する厚さ１０〜５０μｍの透明樹脂フイルムを
熱融着させた光沢性と加工耐食性に優れた透明樹脂フイ
ルム被覆めっき鋼板。3. A bright nickel plating on the surface of a low carbon steel plate having an average roughness of the plating original plate of 0.2 μm or less and a metal Cr content of 5 on one or both surfaces of the nickel plating surface.
A bright chrome plating layer having a thickness of 0 mg to 300 mg / m 2 and a transparent resin film having a thickness of 10 to 50 μm having thermoplasticity on one or both surfaces of the bright chrome plating surface are heat-fused to provide excellent gloss and processing corrosion resistance. Transparent resin film coated steel sheet.
である低炭素鋼板の両面に光沢ニッケルめっきとそのニ
ッケルめっき表面の片面に金属Ｃｒ量で５０ｍｇ〜３０
０ｍｇ／ｍ2の光沢クロムめっき層を有する片面光沢ニ
ッケル、片面光沢クロムのめっき鋼板の少なくとも光沢
クロムめっき面に熱可塑性を有する厚さ１０〜５０μｍ
の透明樹脂フイルムを熱融着させた光沢性と加工耐食性
に優れた透明樹脂フイルム被覆めっき鋼板。4. A low carbon steel plate having an average roughness of 0.2 μm or less of a plated original plate, has bright nickel plating on both sides, and one surface of the nickel plated surface has a metal Cr amount of 50 mg to 30.
Thickness of 10 to 50 μm having thermoplasticity on at least the bright chrome plated surface of a plated steel sheet having a bright chrome plated layer of 0 mg / m 2
A transparent resin film-coated plated steel sheet with excellent gloss and processing corrosion resistance, which is obtained by heat-sealing the transparent resin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06180397A JP3073656B2 (en) | 1994-07-11 | 1994-07-11 | Transparent resin film coated plated steel sheet with excellent gloss and corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06180397A JP3073656B2 (en) | 1994-07-11 | 1994-07-11 | Transparent resin film coated plated steel sheet with excellent gloss and corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0820888A true JPH0820888A (en) | 1996-01-23 |
| JP3073656B2 JP3073656B2 (en) | 2000-08-07 |
Family
ID=16082528
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06180397A Expired - Fee Related JP3073656B2 (en) | 1994-07-11 | 1994-07-11 | Transparent resin film coated plated steel sheet with excellent gloss and corrosion resistance |
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| Country | Link |
|---|---|
| JP (1) | JP3073656B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110097973A1 (en) * | 2008-07-04 | 2011-04-28 | Posco | Method and Apparatus for Removing Scale from Hot-Rolled Steel Strip |
| JP2011246739A (en) * | 2010-05-24 | 2011-12-08 | Toyota Motor Corp | Method of plating stainless steel and plated material for the same |
-
1994
- 1994-07-11 JP JP06180397A patent/JP3073656B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110097973A1 (en) * | 2008-07-04 | 2011-04-28 | Posco | Method and Apparatus for Removing Scale from Hot-Rolled Steel Strip |
| US8806910B2 (en) * | 2008-07-04 | 2014-08-19 | Posco | Method and apparatus for removing scale from hot-rolled steel strip |
| JP2011246739A (en) * | 2010-05-24 | 2011-12-08 | Toyota Motor Corp | Method of plating stainless steel and plated material for the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3073656B2 (en) | 2000-08-07 |
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