JPS6191370A - Surface treatment of aluminum alloy plate for can cover having superior feathering property - Google Patents
Surface treatment of aluminum alloy plate for can cover having superior feathering propertyInfo
- Publication number
- JPS6191370A JPS6191370A JP21178084A JP21178084A JPS6191370A JP S6191370 A JPS6191370 A JP S6191370A JP 21178084 A JP21178084 A JP 21178084A JP 21178084 A JP21178084 A JP 21178084A JP S6191370 A JPS6191370 A JP S6191370A
- Authority
- JP
- Japan
- Prior art keywords
- alloy plate
- surface treatment
- aluminum alloy
- cover
- treatment
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/37—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also hexavalent chromium compounds
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
【産業上の利用分野】
本発明は７エザーりング性に優れた缶蓋用アルミニウム
合金板の表面処理方法に関するものである。
［従米扶術１
アルミニウムおよびアルミニウム合金は成形性、耐蝕性
、開蓋性に優れているので、イーノーオープン用の缶蓋
材として広（使用されている。
アルミニウムおよびアルミニウム合金の蓋材は、一般に
Ｍｇ ２．Ｏ＝５．０ｗｔ％含有するＡｌ−Ｍｇ系合金
板が使用され、内容物の風味の保持および内容物による
蓋材の腐蝕を防止するために、燐酸クロメート処理およ
び塗装−Ｃ施され為が、この際、塗膜の密着性が不充分
である場合には、開蓋時、開口部にフェザーリングと呼
ばれる蓋内面側塗膜の膜残りが発生し、実用上問題とな
る。
そして、この現象は蓋内面側の塗装を厚膜塗装する際に
顕著にみら虹、蓋材の内面１１ｍ１塗装は通常加工前の
板材の状態で２〜５μの塗装が施され、成形加工後、補
修塗装が行なわれるが、この成形加工後のスプレー−装
を省略する目的で、加工前の板材で９〜１４μの厚膜塗
装を行なう場合がある。
この厚膜塗装には、塩ビオルガノゾル系塗料材が用いら
れ、一般にノンリペアコートと呼ばれる加工性、耐蝕性
に優れたものであり、表面処理は燐酸クロメート処理が
行なわれ、この燐酸クロメ−ト処理浴の代表的なものと
して、Ｃｒｙｓ Ｏ，５ｗｔ％、 ＨＩＰ ０４ １，
５ｗ１％、 ＨＦ Ｏ，Ｏｈｔ％で、 ＨＦのＣｒｙ
、に対する重量濃度比が０．１６の水溶液が用いられ、
コイル７オームでスプレ一方式で行なわれるが、フェザ
ーリング性に関しては必ずしも満足のいくものではなか
った。
［発明が解決しよもとする問題、α１
本発明はこのような現状に鑑みなされたものであり、特
に、７エザーりング性に優れた缶蓋用アルミニウム合金
板の表面処理方法を提供するものである。
ｒ問題点を解決するための手段Ｊ
本発明に係る７エザーリング性に優れた缶蓋用アルミニ
ウム合金板の表面処理方法の特徴とするところは、アル
ミニウム蓋材の表面処理として燐酸クロメート処理を行
なう際に、クロム酸に対する弗酸の重量濃度比を０．２
８〜０．）の処理浴を使用し、最大径０．１〜１．０μ
のピットが４μ角中に８個以上有するように処理するこ
とにある。
本発明に係るフェザーリング性に優れた缶蓋用アルミニ
ウム合金板の表面処理方法について以下詳細に説明する
。
先ず、本発明に係るフェザーリング性に優れた缶蓋用ア
ルミニウム合金板の表面処理方法において、クロム酸に
対する弗酸の重量濃度比を０．２８□ 〜０．７とする
ことについて説明する。
一般にＨＦは燐酸りａメート処理における皮膜の生成を
促進するものであるが、本発明者は燐酸クロメート処理
材のフェザーリング性改善について鋭意研究した結果、
ＨＦは皮膜に０．１〜１．θμの微小なピットを生成さ
せる効果があり、これが塗膜の密着性を高めフェザーリ
ング性を向上させることを見出した。
れ′Ｃｓ″−（ｒ）ｈ′を効果を得６′″″には・、
クロム酸に対する弗酸の重量濃度比、を０．２８〜０．
７、 とすることが必要であり、この比が０．２８未満
では皮膜のピット生成が不充分であって所望の効果・
が得られず、また、０．７を越えると皮膜が不均一とな
り耐蝕性が極端に低下するようになろ。
そして、本発明者の知見による塗膜の′ｆＩ着性を高め
るための、皮膜にＱ、１〜１．０＃の微小ビットを４μ
角中に８個以上存在させることにより、７エザーリング
性が向上して塗膜の重着性を高めることができるのであ
る。
［実施例１
本発明に係る７エザーリング性、に優へた缶蓋用アルミ
ニウム合金板の表面処理方法の実施例爺説明する。
実施例
Ｍｇ含有量が４７．５ｗＬ％のアルミニウム合金板の厚
さ０．３２關の・もやを使用し、アルカリ性エツチング
浴（０，２Ｎ ＮａＯＨ７０℃×４秒）で、ｌｕ９チン
グを行なってから、第１表に示す燐酸クロメート処理塔
により処理を行なった後、塩ビオルガノゾル系塗料を１
３μの厚さに塗装し、焼付は条件として、素材到達温度
２６０℃、焼付は時間３６秒で焼付けた。
第１表に示されているフェザーリング性の調査結果によ
れば、本発明に係るフェザーリング性に優れた缶蓋用ア
ルミニウム合金板の表面処理方法は、比較例に比して７
エザーリング性が格段に優れていることは明らかである
。
第１図（ａ）は本発明に係る７エザーリング性に優れた
缶蓋用アルミニウム合金板の表面処理方法の実施例１に
より得られたアルミニウム合金板の表面組織を示す顕微
鏡写真であり、第１図（ｂ）は比較例１のアルミニウム
合金板の表面組織を示す顕微鏡写真である。
【発明の効果１
以上説明したように、本発明に係る７エザーリング性に
優れた缶蓋用アルミニウム合金板の表面処理方法は上記
の構成を有しているものであるから、得られたアルミニ
ウム合金板は成形性、耐蝕性、開蓋性に優れ、さら、に
、フェザーリング性においても極めて優れたものであり
、イージーオープン用蓋材として広く使用することがで
きるという効果を有するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a surface treatment method for an aluminum alloy plate for can lids that has excellent anti-aging properties. [Shubei Fujutsu 1 Aluminum and aluminum alloys have excellent formability, corrosion resistance, and ease of opening, so they are widely used as can lid materials for Eno Open. Aluminum and aluminum alloy lid materials are Generally, an Al-Mg alloy plate containing 5.0 wt% of Mg2.O is used, and is treated with phosphoric acid chromate and coated with -C to maintain the flavor of the contents and prevent corrosion of the lid material due to the contents. However, if the adhesion of the coating film is insufficient at this time, when the lid is opened, a residue of the coating film on the inner surface of the lid, called feathering, will occur at the opening, which poses a practical problem. This phenomenon is noticeable when applying a thick film coating to the inner surface of the lid.The 11m1 coating on the inner surface of the lid is usually coated with a thickness of 2 to 5 μm on the board before processing, and after forming. , repair painting is performed, but in order to omit spraying after this forming process, a thick film of 9 to 14 μm is sometimes applied to the board before processing. It is generally called a non-repair coating and has excellent workability and corrosion resistance.The surface treatment is phosphoric acid chromate treatment.A typical example of this phosphoric acid chromate treatment bath is Crys O, 5wt%, HIP 04 1,
5w1%, HF O, Oht%, Cry of HF
An aqueous solution with a weight concentration ratio of 0.16 to , is used,
Although spraying is carried out using a 7 ohm coil, the feathering properties are not always satisfactory. [Problems to be solved by the invention, α1 The present invention has been made in view of the current situation, and particularly provides a surface treatment method for an aluminum alloy plate for can lids that has excellent 7. edging properties. It is something. Means for Solving Problems J The features of the method for surface treatment of an aluminum alloy plate for can lids having excellent 7 ethering properties according to the present invention are that when performing phosphoric acid chromate treatment as the surface treatment of the aluminum lid material, The weight concentration ratio of hydrofluoric acid to chromic acid was set to 0.2.
8-0. ) using a treatment bath with a maximum diameter of 0.1 to 1.0μ.
The purpose of processing is to have 8 or more pits in a 4μ square. The method for surface treatment of an aluminum alloy plate for can lids with excellent feathering properties according to the present invention will be described in detail below. First, in the method for surface treatment of an aluminum alloy plate for can lids having excellent feathering properties according to the present invention, the weight concentration ratio of hydrofluoric acid to chromic acid is set to 0.28□ to 0.7. Generally, HF promotes the formation of a film during phosphoric acid amate treatment, but as a result of intensive research into improving the feathering properties of phosphoric acid chromate treated materials, the present inventors found that
HF is applied to the film in an amount of 0.1 to 1. It has been found that this has the effect of generating minute pits of θμ, which increases the adhesion of the coating film and improves the feathering properties. The effect is 'Cs''-(r)h', and for 6''''',
The weight concentration ratio of hydrofluoric acid to chromic acid is 0.28 to 0.
7. If this ratio is less than 0.28, the formation of pits in the film will be insufficient and the desired effect will not be achieved.
Moreover, if it exceeds 0.7, the film will become non-uniform and the corrosion resistance will be extremely reduced. Then, according to the knowledge of the present inventors, in order to improve the 'fI adhesion of the coating film, a micro bit of Q, 1 to 1.0 # was added to the coating film by 4 μm.
By having 8 or more of them in the corner, the 7 ethering property can be improved and the adhesion of the coating film can be increased. [Example 1] An example of the surface treatment method for an aluminum alloy plate for can lids with excellent 7-erasing properties according to the present invention will be described. Example: Using an aluminum alloy plate with a Mg content of 47.5 wL% and a thickness of 0.32 mm, lu9 etching was performed in an alkaline etching bath (0.2 N NaOH at 70°C x 4 seconds). , after treatment with the phosphoric acid chromate treatment tower shown in Table 1, 1 ml of vinyl chloride organosol paint
The coating was applied to a thickness of 3μ, and the baking conditions were such that the material reached a temperature of 260°C and the baking time was 36 seconds. According to the survey results of feathering properties shown in Table 1, the surface treatment method of the aluminum alloy plate for can lids with excellent feathering properties according to the present invention is 7.
It is clear that the ethering properties are significantly superior. FIG. 1(a) is a micrograph showing the surface structure of an aluminum alloy plate obtained in Example 1 of the method for surface treatment of an aluminum alloy plate for can lids with excellent ethering properties according to the present invention. Figure (b) is a micrograph showing the surface structure of the aluminum alloy plate of Comparative Example 1. Effects of the Invention 1 As explained above, the method for surface treatment of an aluminum alloy plate for can lids having excellent 7. The plate has excellent moldability, corrosion resistance, and lid-opening properties, and is also extremely excellent in feathering properties, and has the effect that it can be widely used as an easy-open lid material.
第１図（Ａ）および第１図（ｂ）は本発明に係る７エザ
ーリング性に優れた缶蓋用アルミニウム合金板の表面処
理方法の実施例１により得られたアルミニウム合金板の
表面組織を示す顕微鏡写真および比較例１のアルミニウ
ム合金板の表面組織を示す顕微鏡写真である。
手続補正書（自発） ６・
昭和５９年１１月０８日
昭和５９年特許願第２１１７８０号
２、発明の名称
フェザーリング性に優れた缶蓋用アルミニウム合金板の
表面処理方法
３、補正をする者
事件との関係 特許出願人
住所 神戸市中央区脇浜町１丁目３番１８号名称 （１
１９） 株式会社 神戸製鋼所藤和束陽町コープ９０
１号
補正の対象
（１）明細書の特許請求の範囲の欄
（２）明細書の発明の詳細な説明の欄
補正の内容
別紙の通り
１、特許請求の範囲を次の通り補正する。
［アルミニウム歪材の表面処理として燐酸クロメート処
理を行なう際に、クロム酸に対する弗酸の重量濃度比を
Ｌη〜０．７の処理浴を使用し、最大径０．１μ〜１．
０μのピットが４μ角中に８個以上有するように処理す
ることをを持金とする７エザーリング性に優れた缶蓋用
アルミニウム合金板の表面処理方法、」
２、明細書第３頁１７行、同第４頁５〜６行、同第４頁
１５行のｒｏ、２８〜０．７」をｒｏ、２３〜０．）」
と補正する。
３、明細書第４頁１６行の［０，２８Ｊをｒｏ、２３Ｊ
と補正する。
４、明細書第６頁第１表を次の通り補正する。
手続補正書（方式）
昭和６０年０２月１２日FIG. 1(A) and FIG. 1(b) show the surface structure of an aluminum alloy plate obtained by Example 1 of the method for surface treatment of an aluminum alloy plate for can lids with excellent 7 ethering properties according to the present invention. 2 is a micrograph showing a micrograph and a surface structure of an aluminum alloy plate of Comparative Example 1. Procedural amendment (voluntary) 6. November 8, 1980 Patent Application No. 211780 2, Name of invention Surface treatment method for aluminum alloy plate for can lids with excellent feathering properties 3, Person making the amendment Relationship to the incident Patent applicant address 1-3-18 Wakihama-cho, Chuo-ku, Kobe Name (1
19) Kobe Steel, Ltd. Fujiwazuka Yocho Co-op 90
Subject of amendment No. 1 (1) Claims column of the specification (2) Detailed explanation of the invention column of the specification Contents of the amendment As shown in Attachment 1, the claims are amended as follows. [When carrying out phosphoric acid chromate treatment as a surface treatment for aluminum strained material, a treatment bath with a weight concentration ratio of hydrofluoric acid to chromic acid of Lη~0.7 is used, and the maximum diameter is 0.1μ~1.
7. Surface treatment method for aluminum alloy plate for can lids with excellent ethering properties, which involves treating the plate so that it has eight or more 0μ pits per 4μ square.” 2. Specification, page 3, line 17 , page 4, lines 5-6, page 4, line 15, ro, 28-0.7'', ro, 23-0. )”
and correct it. 3. [0,28J ro, 23J on page 4 line 16 of the specification]
and correct it. 4. Table 1 on page 6 of the specification is amended as follows. Procedural amendment (method) February 12, 1985
Claims (1)
を行なう際に、クロム酸に対する弗酸の重量濃度比を０
．２８〜０．７の処理浴を使用し、最大径０．１μ〜１
．０μのビットが４μ角中に８個以上有するように処理
することをを特徴とするフェザーリング性に優れた缶蓋
用アルミニウム合金板の表面処理方法。When performing phosphoric acid chromate treatment as a surface treatment for aluminum lid material, the weight concentration ratio of hydrofluoric acid to chromic acid is set to 0.
．． Using a treatment bath of 28 to 0.7, the maximum diameter is 0.1 μ to 1
．． A method for surface treatment of an aluminum alloy plate for can lids having excellent feathering properties, characterized by treating the plate so that eight or more 0μ bits are present in a 4μ square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21178084A JPS6191370A (en) | 1984-10-09 | 1984-10-09 | Surface treatment of aluminum alloy plate for can cover having superior feathering property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21178084A JPS6191370A (en) | 1984-10-09 | 1984-10-09 | Surface treatment of aluminum alloy plate for can cover having superior feathering property |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6191370A true JPS6191370A (en) | 1986-05-09 |
Family
ID=16611474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21178084A Pending JPS6191370A (en) | 1984-10-09 | 1984-10-09 | Surface treatment of aluminum alloy plate for can cover having superior feathering property |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6191370A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54133440A (en) * | 1978-03-31 | 1979-10-17 | Amchem Prod | Aluminum coating composition and method for coating |
-
1984
- 1984-10-09 JP JP21178084A patent/JPS6191370A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54133440A (en) * | 1978-03-31 | 1979-10-17 | Amchem Prod | Aluminum coating composition and method for coating |
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