JPH0550034A - Aluminum plated cr-containing steel plate having excellent corrosion resistance of end face and worked part - Google Patents
Aluminum plated cr-containing steel plate having excellent corrosion resistance of end face and worked partInfo
- Publication number
- JPH0550034A JPH0550034A JP23371991A JP23371991A JPH0550034A JP H0550034 A JPH0550034 A JP H0550034A JP 23371991 A JP23371991 A JP 23371991A JP 23371991 A JP23371991 A JP 23371991A JP H0550034 A JPH0550034 A JP H0550034A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion resistance
- aluminum
- steel plate
- plated
- resin
- 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
【０００１】[0001]
【産業上の利用分野】本発明は端面および加工部で優れ
た耐食性を示すアルミニウムめっきＣｒ含有鋼板に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum-plated Cr-containing steel sheet which exhibits excellent corrosion resistance on the end face and the processed part.
【０００２】[0002]
【従来の技術及びその課題】従来から建物の屋根や外壁
に使用されてきた着色亜鉛めっき鋼板は雨水、亜硫酸ガ
スなどに曝されて発錆し、めっき層を剥離し、機能劣化
を著しく早める問題から、最近では、市場の要求は益々
厳しさを増して長期耐久性が求められ、従来の着色亜鉛
めっき鋼板に代わってアルミニウム合金めっき鋼板、ア
ルミニウム−亜鉛合金めっき鋼板などが開発されてい
る。例えば、アルミニウム−亜鉛合金めっき鋼板につい
ては、特公平２−３６３８４号公報には「クロメート系
化成処理をしたアルミニウム−亜鉛合金めっき鋼板上に
塗膜形成用樹脂と体質顔料とクロム酸カルシウムとクロ
ム酸ストロンチウムとを混合した下層塗装被膜、さらに
上層塗装被膜を施した塗装鋼板」、特公平２−３２３５
５号公報には「化成処理を施したアルミニウム−亜鉛合
金めっき鋼板にクロム酸ストロンチウムまたはクロム酸
カルシウムを配合した下塗り塗料の下層塗装被膜、この
上に下塗り塗料の下層塗装被膜を施した塗装鋼板」な
ど、多くの種類の塗装アルミニウム−亜鉛合金めっき鋼
板がある。また、アルミニウムめっき鋼板については、
特公平１−１４８６６号公報の「アルミニウムめっき鋼
板にクロム酸塩・リン酸塩などの防錆顔料と炭酸カルシ
ウムの体質顔料とを混合した下層塗装被膜と、その上に
上層塗装被膜を施した塗装アルミニウムめっき鋼板」、
特開平５９−１５９３３４号公報の「アルミニウムめっ
き鋼板にＺｎ−Ｍｇ合金粉末を添加した防錆顔料を含有
する下塗塗装を施し、その上に上塗塗装を施した塗装鋼
板」などの塗装アルミニウムめっき鋼板がある。しかし
ながら、塗装したアルミニウム−亜鉛合金めっき鋼板や
アルミニウムめっき鋼板は、従来から使用されているア
ルミニウム−亜鉛合金やアルミニウムめっき鋼板に比較
して耐食性能が大幅に改善されるにもかかわらず、端面
および加工部で耐食性能を著しく劣化する欠点があり、
問題として残されている。2. Description of the Related Art The colored zinc-plated steel sheets that have been used for roofs and outer walls of buildings have been exposed to rainwater, sulfurous acid gas, etc. to cause rusting, peeling off the plating layer, and significantly accelerating functional deterioration. Therefore, in recent years, market demands have become increasingly severe and long-term durability is required, and aluminum alloy-plated steel sheets, aluminum-zinc alloy-plated steel sheets, and the like have been developed in place of conventional colored zinc-plated steel sheets. For example, regarding an aluminum-zinc alloy-plated steel sheet, Japanese Patent Publication No. 2-36384 discloses "a resin for forming a coating film, an extender pigment, calcium chromate, and chromic acid on an aluminum-zinc alloy-plated steel sheet that has been subjected to chromate conversion treatment. "Coated steel sheet with a lower coating film mixed with strontium and an upper coating film", Japanese Patent Publication No. 2-3235
Japanese Unexamined Patent Publication No. 5 discloses "undercoating coating film of an undercoating material in which strontium chromate or calcium chromate is mixed with an aluminium-zinc alloy-plating steel sheet subjected to chemical conversion treatment, and a coated steel sheet having an undercoating coating film of the undercoating material applied thereon" There are many types of coated aluminum-zinc alloy plated steel sheets, etc. For aluminum plated steel sheet,
Japanese Patent Publication No. 14866/1990, "Aluminum-plated steel sheet mixed with anticorrosive pigments such as chromate / phosphate and an extender of calcium carbonate, a lower coating film, and an upper coating film applied thereon. Aluminum plated steel sheet ",
A coated aluminum-plated steel sheet such as "A coated steel sheet obtained by applying an undercoat coating containing an anticorrosive pigment to which Zn-Mg alloy powder is added to an aluminum-plated steel sheet and then applying an overcoat coating thereon" of JP-A-59-159334. is there. However, although the painted aluminum-zinc alloy-plated steel sheet and the aluminum-plated steel sheet are significantly improved in corrosion resistance performance as compared with the conventionally used aluminum-zinc alloy and aluminum-plated steel sheet, the end surface and the processed Part has the drawback of significantly degrading corrosion resistance,
It remains a problem.
【０００３】[0003]
【課題を解決するための手段】本発明は、このような問
題を解消し端面および加工部で耐食性に優れたアルミニ
ウムめっき鋼板を提供する事を目的としたもので、その
要旨は、アルミニウムめっきＣｒ含有鋼板の表面に化成
処理層を施した後、この表面にクロム酸ストロンチウム
と二酸化ケイ素を混合した樹脂系塗装被膜層、さらに樹
脂系塗装被膜層を施したアルミニウムめっきＣｒ含有鋼
板である。特に本発明は、下塗被膜においてクロム酸ス
トロンチウムと二酸化ケイ素を混合した樹脂系塗装を施
す事により、鋼板の端面などにおいて優れた耐食性が得
られるところに特徴がある。The object of the present invention is to solve the above problems and to provide an aluminum-plated steel sheet which is excellent in corrosion resistance at the end face and the processed portion. This is an aluminum-plated Cr-containing steel sheet obtained by applying a chemical conversion treatment layer to the surface of the containing steel sheet, and then applying a resin coating film layer obtained by mixing strontium chromate and silicon dioxide on this surface, and further applying a resin coating film layer. In particular, the present invention is characterized in that excellent corrosion resistance can be obtained on the end face of a steel sheet by applying a resin coating in which strontium chromate and silicon dioxide are mixed in the undercoat film.
【０００４】以下、本発明について詳細に説明をする。
転炉、電気炉あるいはさらに精製炉などの溶解炉で溶製
された溶鋼を造塊・分塊法あるいは連続鋳造法で得られ
た鋼片を圧延、溶融アルミニウムめっきするなど通常の
めっき鋼板製造過程を経て製造されたアルミニウムめっ
きＣｒ含有鋼板に塗装する。アルミニウムめっきを施し
たＣｒ含有鋼板は、Ｃｒを含有しないこれまでの鋼板に
較べ、鋼板およびめっき層の耐食性を改善する。すなわ
ち、アルミニウムめっきＣｒ含有鋼板は、溶融アルミニ
ウムめっき工程において鋼中のＣｒがめっき層に拡散
し、例えば塩水などの腐食環境に曝された場合の腐食初
期過程においてめっき層のＣｒが腐食生成物中に溶出濃
化してカソード反応を抑制した欠陥部の少ない腐食生成
物を形成し、めっき層の腐食速度を減少して耐食性を向
上させる。その効果は、鋼中Ｃｒ含有量の増加に耐食性
が増大し、鋼中のＣｒ含有量が５％以上で顕著に認めら
れる。しかし、鋼中のＣｒ含有量が２０％を越えると、
めっき層の耐食性向上効果が飽和域に達し、その効果が
相対的に減少する傾向にある。本発明において鋼中に含
有されるＣｒ量は、特に限定するものではないが、５〜
２０％が好ましい。The present invention will be described in detail below.
Ordinary plated steel sheet manufacturing process such as rolling and hot-dip aluminization of steel pieces obtained by ingot casting / agglomeration method or continuous casting method of molten steel manufactured in a melting furnace such as a converter, electric furnace or further refining furnace The aluminum-plated Cr-containing steel plate manufactured through the above is coated. The Cr-containing steel plate plated with aluminum improves the corrosion resistance of the steel plate and the plating layer as compared with the conventional steel plate containing no Cr. That is, in the aluminum-plated Cr-containing steel plate, in the molten aluminum plating step, Cr in the steel diffuses into the plating layer, and when the Cr is contained in the corrosion product such as salt water, the Cr in the plating layer is a corrosion product in the initial corrosion process. It forms a corrosion product with less defects by suppressing the cathode reaction by elution and concentration, and reduces the corrosion rate of the plating layer to improve the corrosion resistance. The effect is that corrosion resistance increases with an increase in the Cr content in the steel, and is notably recognized when the Cr content in the steel is 5% or more. However, if the Cr content in steel exceeds 20%,
The effect of improving the corrosion resistance of the plating layer reaches the saturation region, and the effect tends to decrease relatively. In the present invention, the amount of Cr contained in the steel is not particularly limited,
20% is preferable.
【０００５】このようにして得られたアルミニウムめっ
きＣｒ含有鋼板の表面に、クロム酸系やリン酸亜鉛系の
化成処理層をスプレーまたは浸漬法によって施す。化成
処理層は、塗装下地層で塗料密着性の向上を図るもの
で、加工時の塗膜剥離を防止する。このようにしてアル
ミニウムめっきＣｒ含有鋼板の表面を改質した化成処理
層に、防錆顔料のクロム酸ストロンチウムと二酸化ケイ
素を混合した樹脂組成の塗装皮膜層を施す。この塗装皮
膜層は、切断された鋼板の端面および屈曲された加工部
に耐食性を付与するものである。樹脂にはエポキシ樹脂
系、アクリル樹脂系、ポリエステル樹脂系、フェノキシ
樹脂系、ウレタン樹脂系など加工密着性、耐食性、耐衝
撃性など鋼板に要求される諸性質をもつ高分子系の樹脂
を単独またはこれらを複合して使用される。これらの樹
脂に配合されるクロム酸ストロンチウムは、鋼板の端面
や加工部における耐食性を長期間付与し、さらにこの上
に塗装される塗膜の端面膨れ（エッジクリープ）を減少
させる効果もある。このような効果は、樹脂中にクロム
酸ストロンチウムを配合して得られるが、中でも５〜６
０％が好ましい。On the surface of the aluminum-plated Cr-containing steel sheet thus obtained, a chromic acid-based or zinc phosphate-based chemical conversion treatment layer is applied by spraying or dipping. The chemical conversion treatment layer is an undercoat layer for improving paint adhesion and prevents peeling of the coating film during processing. A coating film layer having a resin composition in which strontium chromate as a rust preventive pigment and silicon dioxide are mixed is applied to the chemical conversion treatment layer thus modified on the surface of the aluminum-plated Cr-containing steel plate. This coating film layer imparts corrosion resistance to the end surface of the cut steel sheet and the bent processed portion. As the resin, epoxy resin type, acrylic resin type, polyester resin type, phenoxy resin type, urethane resin type or other polymer type resin having various properties required for steel sheet such as process adhesion, corrosion resistance and impact resistance can be used alone or These are used in combination. The strontium chromate compounded in these resins has the effect of imparting corrosion resistance at the end surface of the steel sheet and the processed portion for a long period of time, and further reducing the end surface swelling (edge creep) of the coating film coated thereon. Such an effect can be obtained by blending strontium chromate into the resin, but 5 to 6
0% is preferable.
【０００６】また二酸化ケイ素は、クロム酸ストロンチ
ウムとの併合配合によって耐食性を長期間に亘って持続
させるいわゆる徐放効果を示し、塗膜の端面膨れを抑制
し、塗膜密着性を向上する効果を奏する。このような二
酸化ケイ素の効果は、二酸化ケイ素をカップリング剤で
処理することにより一層持続する事ができ、しかも樹脂
中に１０％以上の配合で顕著に得られる。すなわち本発
明において、樹脂中にクロム酸ストロンチウムと二酸化
ケイ素を併用して配合する事により、表面積の大きな多
孔性の二酸化ケイ素がクロム酸ストロンチウムを吸着す
るため、使用初期にクロム酸ストロンチウムを溶出しつ
くしてしまう事もなく、徐々にクロム酸ストロンチウム
が溶出し防錆効果を持続する効果を奏する。本発明にお
いては、厚み増加、色付けなどの目的から、さらに酸化
チタンのような体質顔料を混合してもよい。さらに本発
明は、その上層に樹脂系塗装被膜層を施す。上層の樹脂
系塗装被膜層は、耐食性や加工性を付与するもので、ポ
リウレタン樹脂塗料、アクリル樹脂塗料、アルキッド樹
脂塗料、ウレタン樹脂塗料、シリコンポリエステル樹脂
塗料、シリコンアクリル樹脂塗料、フッ素樹脂塗料など
を使用する。上記のような樹脂塗装が施されたアルミニ
ウムめっきＣｒ含有鋼板は、板表面は勿論の事、切断さ
れた鋼板の端面および屈曲された加工部に耐食性などを
著しく向上する効果を奏する。Further, silicon dioxide has a so-called sustained release effect of maintaining corrosion resistance for a long period of time by the combined use with strontium chromate, and has an effect of suppressing bulging of the end surface of the coating film and improving the adhesion of the coating film. Play. Such an effect of silicon dioxide can be further prolonged by treating the silicon dioxide with a coupling agent, and can be remarkably obtained at a content of 10% or more in the resin. That is, in the present invention, by combining strontium chromate and silicon dioxide in the resin together, porous silicon dioxide having a large surface area adsorbs strontium chromate, so that strontium chromate is completely eluted at the beginning of use. The strontium chromate gradually elutes, and the effect of sustaining the rust preventive effect is exhibited. In the present invention, an extender pigment such as titanium oxide may be further mixed for the purpose of increasing the thickness and coloring. Further, in the present invention, a resin-based coating film layer is applied as the upper layer. The upper resin-based coating film layer imparts corrosion resistance and processability, and includes polyurethane resin paint, acrylic resin paint, alkyd resin paint, urethane resin paint, silicone polyester resin paint, silicone acrylic resin paint, fluororesin paint, etc. use. The aluminum-plated Cr-containing steel sheet coated with the resin as described above has an effect of significantly improving corrosion resistance not only on the plate surface but also on the end surface of the cut steel sheet and the bent processed portion.
【０００７】[0007]
【実施例】次に実施例および比較例により、本発明を具
体的に説明する。例中の％、部はいずれも重量基準であ
る。 （実施例１〜１１ および比較例１〜４）板厚０．６ｍ
ｍのアルミニウムめっきＣｒ含有鋼板（目付量２００ｇ
／ｍ2(両面））にクロム酸（ＣｒＯ3−ＳｉＯ2）系化成
処理液（ＺＮ−１３００ＡＮ＝日本パーカライジング社
製）を被膜量が２０〜８０ｍｇ／ｍ2（乾燥状態）にな
るよう、ロール塗装を行い、８０〜１００℃で乾燥させ
た。次に形成された化成処理層の表面にエポキシエステ
ル系下塗り塗料の不揮発分に対し表１に示す量のクロム
酸ストロンチウム、及び二酸化ケイ素が配合された下塗
り塗料を７〜９ｇ／ｍ2（乾燥状態）の範囲で塗布し、
板温２００℃にて６０秒間焼付けをし、その上に、ポリ
フッ化ビニリデン系上塗り塗料（日本油脂社製プレカラ
ーＮｏ．８０００ブルー）をロールコーターにて乾燥膜
厚が２０〜２５μになるように塗布し、板温２４０℃に
て６０秒間焼付けて塗装鋼板を得た。EXAMPLES Next, the present invention will be specifically described with reference to Examples and Comparative Examples. All% and parts in the examples are based on weight. (Examples 1 to 11 and Comparative Examples 1 to 4) Plate thickness 0.6 m
m aluminum plated Cr-containing steel plate (Basis weight 200 g
/ M 2 (both sides)) and chromic acid (CrO 3 —SiO 2 ) type chemical conversion treatment liquid (ZN-1300AN = Nippon Parkerizing Co., Ltd.) so that the coating amount is 20 to 80 mg / m 2 (dry state) It was painted and dried at 80-100 ° C. Next, on the surface of the formed chemical conversion treatment layer, an amount of strontium chromate and silicon dioxide in the amounts shown in Table 1 was added to the nonvolatile content of the epoxy ester-based undercoating material in an amount of 7 to 9 g / m 2 (dry state). ) Range,
After baking for 60 seconds at a plate temperature of 200 ° C., a polyvinylidene fluoride-based top coating (pre-color No. 8000 blue manufactured by NOF CORPORATION) was applied on a roll coater so that the dry film thickness was 20 to 25 μm. It was applied and baked at a plate temperature of 240 ° C. for 60 seconds to obtain a coated steel plate.
【０００８】（従来例 １〜５）表１に示す素材を用
い、表面にクロム酸ストロンチウムを下塗り塗料の不揮
発分に対して、表中に示す重量％含有したエポキシエス
テル系下塗リ塗料を塗布した他は、実施例と同様にして
塗装鋼板を得た。以上で作成した試験片について、以下
に示す試験項目、及び方法で試験を行なった結果を同時
に表１に示した。(Conventional Examples 1 to 5) Using the materials shown in Table 1, an epoxy ester undercoat recoating material containing strontium chromate in a weight percentage shown in the table relative to the nonvolatile content of the undercoating material was applied on the surface. Others were the same as in the example to obtain a coated steel sheet. The test items prepared as described above are shown in Table 1 at the same time with the results of the tests performed by the following test items and methods.
【０００９】[0009]
【表１Ａ】 [Table 1A]
【００１０】[0010]
【表１Ｂ】 [Table 1B]
【００１１】（試験方法、及び評価方法）密着性（沸水１０Ｈｒｓ後） ：塗装鋼板（７×２５ｃ
ｍ）沸騰水に１０時間浸漬した後、１時間放置し、ゴバ
ン目エリクセン試験（１ｍｍ／１ｍｍ １００／１００
６．５ｍｍ押し出し）及び４Ｔ−ＴＢｅｎｄ曲げ加工を
行ない、加工部の耐セロテープ密着性の評価を行なっ
た。５点法で評価し、全くハクリなしを５点、全ハクリ
を１点として評価した。 耐エッジクリープ性：塗装鋼板の三辺の端面、及び裏面
をポリエステルテープでシールした塗装鋼板を塩水噴霧
試験機（ＪＩＳ Ｋ−５４００ ７、８）に暴露し、シー
ルしていない端面からの塗膜のブリスターふくれ状況
（以下エッジクリープと呼ぶ）を評価するもので、その
ブリスターの最大長さ（ｍｍ）で評価した。加工部の耐食性 ：塗装鋼板の４辺の端面、及び裏面をポ
リエステルテープでシールした塗装鋼板に４Ｔ曲げ加工
を行い塩水噴霧試験機（ＪＩＳ Ｋ−５４００７、８）
に暴露し、加工部のブリスター発錆状態の評価を行なっ
た。５点法で評価し、全く異常なしを５点、著しく劣化
の認められるものを１点として評価した。(Test method and evaluation method) Adhesion (after 10 hours of boiling water) : Painted steel plate (7 × 25c)
m) Immersed in boiling water for 10 hours, then allowed to stand for 1 hour, and then subjected to a goggle Erichsen test (1 mm / 1 mm 100/100
(Extrusion of 6.5 mm) and 4T-TBend bending were performed to evaluate the cellophane tape adhesion resistance of the processed part. Evaluation was carried out by a 5-point method, with 5 points indicating no peeling at all and 1 point indicating total peeling. Edge creep resistance: A coated steel sheet whose end surfaces on three sides and the back surface are coated with a polyester tape is exposed to a salt spray tester (JIS K-5400 7, 8) and the coating is applied from the unsealed end surface. The blister blister condition (hereinafter, referred to as edge creep) was evaluated by the maximum length (mm) of the blister. Corrosion resistance of processed part : Salt spray tester (JIS K-54007, 8) by applying 4T bending to coated steel sheet with polyester tape on the four sides and back side of coated steel sheet.
The rusted state of the blister in the processed part was evaluated. Evaluation was carried out by a 5-point method, with 5 points indicating no abnormalities and 1 point indicating significant deterioration.
【００１２】表１から明かな様に、本発明の範囲から外
れた比較例１〜４は、端面の耐エッジクリープ性が悪
く、又、従来例１〜５は、高級素材であるステンレス、
アルミニウムを除き、耐エッジクリープ性が劣り、また
加工部の劣化が激しいことが判る。本発明に準じた実施
例１〜１１は端面、加工部において、ステンレス、アル
ミニウムと同様の性能を有し、従来問題とされていた端
面、加工部の耐食性が劣るという塗装鋼板の欠点を大幅
に改良ならしめた上、経済性にもすぐれた塗装鋼板の提
供を可能にすることができた。As is apparent from Table 1, Comparative Examples 1 to 4 which are out of the scope of the present invention have poor edge creep resistance on the end faces, and Conventional Examples 1 to 5 are stainless steel which is a high-grade material,
Except for aluminum, it can be seen that the edge creep resistance is poor and that the deterioration of the processed part is severe. Examples 1 to 11 according to the present invention have the same performance as stainless steel and aluminum in the end face and the processed part, and the disadvantage of the coated steel sheet that the end face and the processed part are inferior in corrosion resistance, which has been a problem in the past, is significantly increased. In addition to being improved, it was possible to provide coated steel sheets with excellent economic efficiency.
【００１３】[0013]
【発明の効果】以上述べたように、本発明によって従来
問題とされていた端面、加工部の耐食性が劣るとされて
いた塗装鋼板の欠点を大幅に改善し、鋼板の端面及び加
工部などにおいて優れた耐食性が得られる建材用鋼板を
提供することにある。As described above, according to the present invention, the drawbacks of the coated steel sheet, which has been considered to be inferior in the corrosion resistance of the end face and the worked portion according to the present invention, are significantly improved, and the end face of the steel sheet and the worked portion are improved. An object of the present invention is to provide a steel sheet for building materials that can obtain excellent corrosion resistance.
フロントページの続き (72)発明者 樋口 征順 福岡県北九州市戸畑区飛幡町１番１号 新 日本製鐵株式会社八幡製鐵所内 (72)発明者 城戸 勝正 福岡県北九州市若松区大字安瀬１番地 東 海鋼業株式会社若松工場内 (72)発明者 松井 岩根 福岡県北九州市若松区大字安瀬１番地 東 海鋼業株式会社若松工場内 (72)発明者 茶谷 悦司 兵庫県明石市二見町西二見2001−18−Ｃ− 313 (72)発明者 羽根 高志 兵庫県神戸市西区美賀多台１−９−１− 1007Front page continuation (72) Inventor Seijun Higuchi 1-1, Toibata-cho, Tobata-ku, Kitakyushu, Fukuoka Prefecture (72) Inside the Yawata Works, Nippon Steel Co., Ltd. Address Tokai Steel Industry Co., Ltd. Wakamatsu Plant (72) Inventor Matsui Iwane 1 Aze, Wakamatsu Ward, Kitakyushu City, Fukuoka Prefecture Tokai Steel Industry Co., Ltd. Wakamatsu Plant (72) Inventor Chatani Etsushi Nishi Futamicho, Akashi City, Hyogo Prefecture Futami 2001-18-C- 313 (72) Inventor Takashi Hane 1-9-1-1007 Mikatadai, Nishi-ku, Kobe-shi, Hyogo
Claims (1)
を化成処理層を施した後、この表面にクロム酸ストロン
チウムと二酸化ケイ素を混合した樹脂系塗装被膜層、さ
らに樹脂系塗装被膜層を施した事を特徴とする端面およ
び加工部の耐食性が優れたアルミニウムめっきＣｒ含有
鋼板。1. A surface of an aluminum-plated Cr-containing steel sheet is subjected to a chemical conversion treatment layer, and then a resin-based coating film layer in which strontium chromate and silicon dioxide are mixed, and a resin-based coating film layer are further applied. An aluminum-plated Cr-containing steel plate having excellent corrosion resistance of the end face and the processed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3233719A JP2564221B2 (en) | 1991-08-22 | 1991-08-22 | Aluminum-plated Cr-containing steel plate with excellent corrosion resistance on the end face and processed part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3233719A JP2564221B2 (en) | 1991-08-22 | 1991-08-22 | Aluminum-plated Cr-containing steel plate with excellent corrosion resistance on the end face and processed part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0550034A true JPH0550034A (en) | 1993-03-02 |
| JP2564221B2 JP2564221B2 (en) | 1996-12-18 |
Family
ID=16959493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3233719A Expired - Fee Related JP2564221B2 (en) | 1991-08-22 | 1991-08-22 | Aluminum-plated Cr-containing steel plate with excellent corrosion resistance on the end face and processed part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2564221B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648034A (en) * | 1986-08-14 | 1989-01-12 | Nippon Kokan Kk | High corrosion resistant plural layer coated steel plate |
| JPH01270976A (en) * | 1988-04-20 | 1989-10-30 | Kansai Paint Co Ltd | Method and composition for surface treatment of zinc plated steel material |
-
1991
- 1991-08-22 JP JP3233719A patent/JP2564221B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648034A (en) * | 1986-08-14 | 1989-01-12 | Nippon Kokan Kk | High corrosion resistant plural layer coated steel plate |
| JPH01270976A (en) * | 1988-04-20 | 1989-10-30 | Kansai Paint Co Ltd | Method and composition for surface treatment of zinc plated steel material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2564221B2 (en) | 1996-12-18 |
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