JP2583246B2 - Manufacturing method of plastic sheet coated galvanized steel sheet with excellent adhesion and corrosion resistance - Google Patents
Manufacturing method of plastic sheet coated galvanized steel sheet with excellent adhesion and corrosion resistanceInfo
- Publication number
- JP2583246B2 JP2583246B2 JP26280487A JP26280487A JP2583246B2 JP 2583246 B2 JP2583246 B2 JP 2583246B2 JP 26280487 A JP26280487 A JP 26280487A JP 26280487 A JP26280487 A JP 26280487A JP 2583246 B2 JP2583246 B2 JP 2583246B2
- Authority
- JP
- Japan
- Prior art keywords
- galvanized steel
- steel sheet
- corrosion resistance
- coating
- plastic sheet
- 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 - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Chemical Treatment Of Metals (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） プラスチック被覆亜鉛めっき鋼板の用途は多岐にわた
り、耐食性がさほど要求されない化粧板から、クロスカ
ット部および端面部の耐食性が要求されるバスユニット
用材や雨樋などにも及んでいるがあとで述べる耐食性を
著しく向上させることが必要な、この種鋼板製品につい
ての開発研究の成果に関連して以下に提案する。DETAILED DESCRIPTION OF THE INVENTION (Industrial application fields) Plastic-coated galvanized steel sheets are used in a wide variety of applications, from decorative plates that do not require much corrosion resistance to bus unit materials that require corrosion resistance at the cross-cut part and end face part. The following proposals are made in connection with the results of research and development on this type of steel product, which extends to rain gutters, etc., but needs to significantly improve the corrosion resistance described later.
亜鉛めっき鋼板にプラスチックシート被覆を行なう場
合は、被覆後の耐食性および被覆の密着性を向上させる
ために、裸のめっき鋼板ではなく、めっき表面にりん酸
亜鉛処理又はクロメート処理を施こした亜鉛めっき鋼板
を用いることが多い。これらの方法は広く実用化されて
いるが、必ずしも次に述べるように十分な性能ではな
い。When coating a galvanized steel sheet with a plastic sheet, use zinc phosphate treatment or chromate treatment on the plating surface instead of bare plated steel sheet to improve the corrosion resistance and coating adhesion after coating. Steel plates are often used. Although these methods are widely used, they do not always have sufficient performance as described below.
従来から用いられているりん酸亜鉛処理亜鉛めっき鋼
板のりん酸亜鉛は、難溶性の無機塩で化学的には安定で
あり、通常の腐食環境では変質することがないので耐食
性は良好である。しかしながらりん酸亜鉛は無機塩の結
晶であるためもろく加工性に乏しい。従がって亜鉛めっ
き鋼板にか酷な加工を行なうと、りん酸亜鉛の結晶が破
壊して被覆がはく離するうれいがある。Conventionally used zinc phosphate of a zinc phosphate treated galvanized steel sheet is a poorly soluble inorganic salt, is chemically stable, and does not deteriorate in a normal corrosive environment, and thus has good corrosion resistance. However, since zinc phosphate is a crystal of an inorganic salt, it is brittle and poor in workability. Therefore, when severe processing is performed on a galvanized steel sheet, there is a possibility that the zinc phosphate crystal is broken and the coating is peeled off.
これに対しクロメート皮膜は、ゲル被膜であるために
りん酸亜鉛被膜に比較すると、加工性は良好であるが、
これによるプラスチックシート被覆亜鉛めっき鋼板を表
面疵の入った状態で塩水中に浸漬すると、クロメート皮
膜が変質又は溶解して、プラスチックシート被覆の剥離
を生じることがある。On the other hand, the chromate film has better processability than the zinc phosphate film because it is a gel film,
If the plastic sheet-coated galvanized steel sheet is immersed in salt water with surface flaws, the chromate film may be altered or dissolved, and peeling of the plastic sheet coating may occur.
このような理由から亜鉛めっき鋼板上に上記のような
化成処理を施しただけのプラスチックシート被覆亜鉛め
っき鋼板は性能が十分でない。For these reasons, the performance of a plastic sheet-coated galvanized steel sheet obtained by merely subjecting a galvanized steel sheet to the above chemical conversion treatment is not sufficient.
（従来の技術） 以上の欠点を除去するために、亜鉛めっき鋼材の表面
にニッケルめっき層を形成し、さらにめっき表面にクロ
メート皮膜を形成してからプラスチックシートを接着被
覆したプラスチックシート被覆亜鉛メッキ鋼材が提案
（特公昭56−36869号公報）されているが、これには製
造ラインを改造しなければならないところに問題があ
る。(Prior art) In order to eliminate the above drawbacks, a plastic sheet-coated galvanized steel material in which a nickel plating layer is formed on the surface of a galvanized steel material, a chromate film is further formed on the plating surface, and a plastic sheet is adhesively coated. Has been proposed (Japanese Patent Publication No. 56-36869), but there is a problem in that the production line must be modified.
（発明が解決しようとする問題点） 発明者らは、このような従来のプラスチックシート被
覆亜鉛めっき鋼板の欠点を解決するため、亜鉛めっき鋼
板の表面に付着させる下地処理について種々試験した結
果、上述したりん酸亜鉛処理およびクロメート処理を併
用してそれらの有意性を最大限に利用した方法がもっと
も密着性と耐食性に優れていることを見い出した。(Problems to be Solved by the Invention) In order to solve the above-mentioned drawbacks of the conventional plastic sheet-coated galvanized steel sheet, the inventors conducted various tests on a base treatment to be attached to the surface of the galvanized steel sheet. It has been found that a method that maximizes the significance of the combined use of zinc phosphate treatment and chromate treatment is the most excellent in adhesion and corrosion resistance.
（問題点を解決するための手段） この発明は亜鉛めっき鋼板の表面に、りん酸亜鉛被膜
を0.5g/m2以上1.5g/m2以下の付着量で形成し、このりん
酸亜鉛被膜の表面にクロメート皮膜を全クロム付着量で
30mg/m2以上150mg/m2以下の厚さにて形成し、このクロ
メート皮膜上に重ねてプラスチックシートを接着被覆す
ることからなる、密着性及び耐食性に優れたプラスチッ
クシート被覆亜鉛めっき鋼板の製造法である。(Means for Solving the Problems) The present invention forms a zinc phosphate coating on the surface of a galvanized steel sheet with an adhesion amount of 0.5 g / m 2 or more and 1.5 g / m 2 or less. Chromate coating on the surface with total chromium adhesion
Manufacture of plastic sheet-coated galvanized steel sheet with excellent adhesion and corrosion resistance, consisting of a thickness of 30 mg / m 2 or more and 150 mg / m 2 or less and adhesively coating a plastic sheet on this chromate film Is the law.
（作 用） この発明における亜鉛めっきとしては、溶融めっきお
よび電気めっきのいずれでもよい。亜鉛めっきの付着量
は、特に限定するまでもないが、通常亜鉛めっき鋼板と
して用いられる付着量の範囲が望ましい。(Operation) The zinc plating in the present invention may be either hot-dip plating or electroplating. Although there is no particular limitation on the amount of galvanized coating, the range of the amount of galvanized steel sheet usually used is desirable.
次にこの発明におけるりん酸亜鉛被膜付着量の範囲は
0.5〜1.5g/m2とするが、0.5g/m2未満では耐食性が十分
でなく、また1.5g/m2を超えると密着性が極端に低下す
るからである。Next, the range of the zinc phosphate coating amount in the present invention is as follows.
Although the 0.5 to 1.5 g / m 2, is less than 0.5 g / m 2 because the corrosion resistance is insufficient, and adhesion exceeds 1.5 g / m 2 is extremely lowered.
この発明においてクロメート皮膜は、全クロム付着量
として30〜150mg/m2の範囲とし、それというのは30mg/m
2未満では塩水噴霧に対する耐食性が低下し、150mg/m2
超えると、加工性が低下する傾向になるからである。Chromate coating in the present invention, the range of 30~150mg / m 2 as the total chromium coating weight, because it is 30 mg / m
If it is less than 2 , the corrosion resistance to salt spray decreases, and 150 mg / m 2
If it exceeds, workability tends to decrease.
この発明の対象とするプラスチックシートの樹脂の種
類としては、塩化ビニル樹脂，ポリエステル樹脂，ふっ
素樹脂，アクリル樹脂，ポリエチレン樹脂などである。
このプラスチックシートの被覆方法は、加熱圧着，接着
剤による被覆のいずれでもよい。The types of resin of the plastic sheet to which the present invention is applied include vinyl chloride resin, polyester resin, fluorine resin, acrylic resin, polyethylene resin and the like.
The method of coating the plastic sheet may be either heat compression bonding or coating with an adhesive.
（実施例） 実施例１（試験片符号B.C.D.H.I.J） 溶融亜鉛めっき鋼板（ゼロスパングル，スキンパス
材，亜鉛付着量238g/m2）に、下記の条件でりん酸亜鉛
前処理およびりん酸亜鉛処理を行なった。(Example) Example 1 (specimen code BCDHIJ) A hot dip galvanized steel sheet (zero spangle, skin pass material, zinc adhesion 238 g / m 2 ) was subjected to zinc phosphate pretreatment and zinc phosphate treatment under the following conditions. Was.
次に、ロールコーターを用いて下記の条件でクロメー
ト処理を行った。 Next, a chromate treatment was performed using a roll coater under the following conditions.
上記処理を施こした後、塩化ビニルシートの被覆を行
ない、各種のテストを実施した。 After the above treatment, the vinyl chloride sheet was coated and various tests were performed.
比較例１（従来法；試験片符号A.E.F.G.K）には、同
じ亜鉛めっき鋼板にりん酸亜鉛前処理およびりん酸亜鉛
処理並びにクロメート処理を、被膜厚を変えて行い、乾
燥させた。In Comparative Example 1 (conventional method; specimen code AEFGK), the same galvanized steel sheet was subjected to a zinc phosphate pretreatment, a zinc phosphate treatment, and a chromate treatment while changing the coating thickness, and dried.
また比較材２（従来法；試験片符号L.M）には、同じ
亜鉛めっき鋼板に、反応型によるクロメート処理（全ク
ロム付着量50及び100mg/m2）を行ない、乾燥させた。In Comparative Material 2 (conventional method; test piece code LM), the same galvanized steel sheet was subjected to a chromate treatment (total chromium deposition amount of 50 and 100 mg / m 2 ) by a reaction type and dried.
この発明によって処理した亜鉛めっき鋼板及び比較材
1,2に対して、塩化ビニルシートの被覆を次のように行
なった。Galvanized steel sheet and comparative material treated according to the present invention
1 and 2 were coated with a vinyl chloride sheet as follows.
塩化ビニル用接着剤をウエットの状態で４μ塗布し、
板温が220℃になるように加熱炉で加熱し、15秒加熱後1
80μの塩化ビニルシートを被覆させ、その直後水冷し、
冷却固化せしめた。Apply 4μ of vinyl chloride adhesive in a wet state,
Heat in a heating furnace so that the sheet temperature becomes 220 ° C.
Cover with 80μ vinyl chloride sheet, then immediately water-cooled,
Cooled and solidified.
評価試験としては、密着性（エリクセン試験）および
耐食性（塩水噴霧試験）を各々次のように行なった。As evaluation tests, adhesion (Erichsen test) and corrosion resistance (salt spray test) were each performed as follows.
（１）密着性試験 第１図に示す辺長90mmの正方形試験Ｐを作成し、中央
部で塩化ビニルシートの表面上に5mm間隔の井桁状カッ
トになるノッチｋを入れ、第２図に示すようにエリクセ
ン試験機で8mm張出し、その部分での剥離巾を判定し
た。(1) Adhesion test A square test P having a side length of 90 mm shown in Fig. 1 was prepared, and a notch k, which becomes a grid-shaped cut at intervals of 5 mm, was formed on the surface of the vinyl chloride sheet at the center, as shown in Fig. 2. As described above, the film was overhanged by 8 mm with an Erichsen tester, and the peeling width at that portion was determined.
エリクセン試験機で8mm張出したときの剥離評価は、 Ａ 全く剥離なし Ｂ 一部剥離 Ｃ ほとんど剥離 のように判定した。 Peeling evaluation when extending 8 mm with an Erichsen tester was determined as follows: A No peeling B Partial peeling C Almost peeling.
（２）塩水噴霧試験 長さ80mm×幅50mm矩形試験片の表面被覆としての塩化
ビニルシート面にクロスカットを入れた後、JISZ 2371
に従がって1,000時間塩水噴霧試験を行ない、塩化ビニ
ルシートを剥がし、クロスカット部の最大錆幅と、端部
からの最大錆侵入巾で評価した。(2) Salt spray test After cross-cutting a vinyl chloride sheet surface as a surface coating of a rectangular test piece of 80 mm length x 50 mm width, JISZ 2371
The salt spray test was carried out for 1,000 hours in accordance with the above, the vinyl chloride sheet was peeled off, and the maximum rust width at the cross cut portion and the maximum rust penetration width from the end were evaluated.
以上のようにして測定した結果を表１に示す。 Table 1 shows the measurement results as described above.
以上の如く、Ａ鋼板のようにりん酸亜鉛被膜量が0.5g
/m2未満では、塩水噴霧試験におけるクロスカット部お
よび端面からの錆の侵入が大である。 As described above, the zinc phosphate coating amount was 0.5 g
If it is less than / m 2 , penetration of rust from the cross cut portion and the end face in the salt spray test is large.
また、ＥおよびＦ鋼板のように、りん酸亜鉛被膜量が
1.5g/m2を超えると、エリクセンによる密着性が劣化す
る。Also, like E and F steel sheets, the zinc phosphate coating amount is
If it exceeds 1.5 g / m 2 , the adhesion due to Erichsen deteriorates.
また、Ｇ鋼板のようにクロメート付着量が30mg/m2未
満になると、塩水噴霧試験においてクロスカット部およ
び端面からの錆侵入が大となる。そのクロメート被膜量
は多ければその効果は大きいが、150mg/m2を超えるとエ
リクセンによる密着性が劣化する。Further, when the chromate adhesion amount is less than 30 mg / m 2 as in the case of the G steel sheet, rust penetration from the cross cut portion and the end face becomes large in the salt spray test. The effect is great if the amount of the chromate coating is large, but if it exceeds 150 mg / m 2 , the adhesion due to Erichsen deteriorates.
L,M鋼板のようにりん酸亜鉛処理を施こさない前処理
では、塩水噴霧試験においてクロスカット部および端面
からの錆侵入が大きくなる。In the pretreatment without zinc phosphate treatment such as the L and M steel sheets, the penetration of rust from the cross cut portion and the end face increases in the salt spray test.
（発明の効果） この発明に則ったプラスチックシート被覆亜鉛めっき
鋼板の製造法によって、この種鋼板の密着性及び耐食性
を有利に向上させることができる。(Effect of the Invention) By the method for producing a galvanized steel sheet coated with a plastic sheet according to the present invention, the adhesion and corrosion resistance of this kind of steel sheet can be advantageously improved.
第１図、第２図はエリクセン張出し試験の要領を示した
説明図である。FIG. 1 and FIG. 2 are explanatory diagrams showing the procedure of the Erichsen overhang test.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭59−133374（ＪＰ，Ａ) 特開 昭62−225341（ＪＰ，Ａ) 特開 昭60−100684（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-59-133374 (JP, A) JP-A-62-225341 (JP, A) JP-A-60-100684 (JP, A)
Claims (1)
を0.5g/m2以上1.5g/m2以下の付着量で形成し、このりん
酸亜鉛被膜の表面に、クロメート皮膜を全クロム付着量
で30mg/m2以上150mg/m2以下の厚さにて形成し、このク
ロメート皮膜上に重ねてプラスチックシートを接着被覆
することを特徴とする、密着性及び耐食性に優れたプラ
スチックシート被覆亜鉛めっき鋼板の製造法。(1) A zinc phosphate coating is formed on the surface of a galvanized steel sheet with an adhesion amount of 0.5 g / m 2 or more and 1.5 g / m 2 or less, and a chromate film is formed on the surface of the zinc phosphate coating by a total chromium coating. A plastic sheet coating with excellent adhesion and corrosion resistance, characterized in that it is formed in a thickness of 30 mg / m 2 or more and 150 mg / m 2 or less in terms of adhesion amount, and is adhered and coated with a plastic sheet over this chromate film Manufacturing method of galvanized steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26280487A JP2583246B2 (en) | 1987-10-20 | 1987-10-20 | Manufacturing method of plastic sheet coated galvanized steel sheet with excellent adhesion and corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26280487A JP2583246B2 (en) | 1987-10-20 | 1987-10-20 | Manufacturing method of plastic sheet coated galvanized steel sheet with excellent adhesion and corrosion resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01105727A JPH01105727A (en) | 1989-04-24 |
| JP2583246B2 true JP2583246B2 (en) | 1997-02-19 |
Family
ID=17380840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26280487A Expired - Lifetime JP2583246B2 (en) | 1987-10-20 | 1987-10-20 | Manufacturing method of plastic sheet coated galvanized steel sheet with excellent adhesion and corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583246B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59133374A (en) * | 1983-01-20 | 1984-07-31 | Nisshin Steel Co Ltd | Plastic-coated steel sheet with improved resistance to corrosion from edge |
-
1987
- 1987-10-20 JP JP26280487A patent/JP2583246B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01105727A (en) | 1989-04-24 |
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