JPH04218680A - Formation of colored film of aluminum - Google Patents
Formation of colored film of aluminumInfo
- Publication number
- JPH04218680A JPH04218680A JP25377790A JP25377790A JPH04218680A JP H04218680 A JPH04218680 A JP H04218680A JP 25377790 A JP25377790 A JP 25377790A JP 25377790 A JP25377790 A JP 25377790A JP H04218680 A JPH04218680 A JP H04218680A
- Authority
- JP
- Japan
- Prior art keywords
- amine
- aluminum
- aqueous solution
- treatment
- colored film
- 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
- 229910052782 aluminium Inorganic materials 0.000 title claims description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 23
- 230000015572 biosynthetic process Effects 0.000 title description 5
- 150000001412 amines Chemical class 0.000 claims abstract description 18
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 3
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 7
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 5
- 238000004040 coloring Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000010348 incorporation Methods 0.000 abstract 2
- 229940043237 diethanolamine Drugs 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- -1 triethane amine Chemical class 0.000 abstract 1
- 229910001593 boehmite Inorganic materials 0.000 description 12
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000007788 liquid Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はアルミニウムの着色皮膜形成法に関し、更に詳
しくはベーマイト法を利用したアルミニウムの着色皮膜
形成法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for forming a colored film on aluminum, and more particularly to a method for forming a colored film on aluminum using the boehmite method.
従来アルミニウム表面を着色する方法として、電着塗装
、電解処理、化成処理及びベーマイト処理が実用化され
ている。このうち電着塗装及び電解処理はコストの面で
問題があり、化成処理及びベーマイト処理が実用的には
優れている。しかしながら化成処理では重金属類を含ん
だ化成処理液を使用するため、廃液処理に大きな問題が
ある。Conventionally, electrodeposition coating, electrolytic treatment, chemical conversion treatment, and boehmite treatment have been put into practical use as methods for coloring aluminum surfaces. Among these, electrodeposition coating and electrolytic treatment have problems in terms of cost, and chemical conversion treatment and boehmite treatment are practically superior. However, since chemical conversion treatment uses a chemical conversion treatment liquid containing heavy metals, there are major problems in waste liquid treatment.
これに対しベーマイト処理ではアミンを少量含んだ水で
処理するため廃液処理も比較的簡単で、化成処理に比し
実用性が高い。元来このベーマイト処理は得られるベー
マイト皮膜が優れた耐蝕性を有し、比較的簡単な処理で
あるため、食器やラジエーター・ファン等の表面処理に
使用されてきたものであり、その殆どは耐蝕皮膜を主眼
として考えられてきたため、あえて着色する必要はなく
、このため未着色のままで使用されることが多い。On the other hand, boehmite treatment uses water containing a small amount of amine, so waste liquid treatment is relatively simple and is more practical than chemical conversion treatment. Originally, this boehmite treatment has been used for surface treatment of tableware, radiators, fans, etc. because the resulting boehmite film has excellent corrosion resistance and is a relatively simple treatment. Since it has been thought of as a film, there is no need to color it, and for this reason it is often used uncolored.
一方ＡＣＳＲ等のアルミニウム電線等に於いてはアルミ
ニウムを着色化し、明度を低下させることが電線特性就
中送電特性上望ましく、これらアルミニウム電線等に於
いては積極的にその表面に着色皮膜を形成して使用する
ものである。On the other hand, in the case of ACSR and other aluminum wires, it is desirable to color the aluminum and reduce its brightness in terms of wire characteristics, especially power transmission characteristics. It is used for
本発明者は上記ベーマイト処理について着目し、このベ
ーマイト処理を用いてアルミニウム電線等の表面に着色
皮膜を形成しうる方法を研究してきた。この研究に於い
て従来のベーマイト処理の主要目的である、無着色皮膜
の形成とは相反する着色皮膜を形成するためには、ベー
マイト処理液に鉄やカルシウムを含有せしめることが必
要であることを見出した。しかしながらこのように鉄や
カルシウムを含有せしめると得られる皮膜の耐蝕性が逆
に劣化し、更に９０〜１００℃で処理する必要があるた
め、液中のアミンや鉄等の濃度管理が極めて困難となり
、皮膜の着色度が大きく変化し、安定した着色度の皮膜
を得ることができないという難点のあることが判明した
。The present inventor has focused on the above-mentioned boehmite treatment and has been researching a method of forming a colored film on the surface of an aluminum electric wire or the like using this boehmite treatment. In this research, we found that it is necessary to include iron and calcium in the boehmite treatment solution in order to form a colored film, which is contrary to the main purpose of conventional boehmite treatment, which is the formation of an uncolored film. I found it. However, when iron and calcium are added to the solution, the corrosion resistance of the resulting film deteriorates, and it also requires treatment at 90 to 100°C, making it extremely difficult to control the concentration of amines, iron, etc. in the solution. However, it was found that the degree of coloration of the film varied greatly, making it impossible to obtain a film with a stable degree of coloration.
従って本発明が解決しようとする課題は、ベーマイト処
理によって上記難点のない着色皮膜をアルミニウムに形
成せしめうる方法を開発することである。Therefore, the problem to be solved by the present invention is to develop a method by which a colored film can be formed on aluminum by boehmite treatment without the above-mentioned disadvantages.
この課題はｐＨが８〜１０であって、且つ少量のアミン
を含有する水溶液からなる処理液を用い、浴温５０〜７
０℃で２分間以上アルミニウムを該処理液と接触、好ま
しくは浸漬することによって解決される。This problem uses a processing solution consisting of an aqueous solution with a pH of 8 to 10 and a small amount of amine, and a bath temperature of 50 to 7.
This problem can be solved by contacting, preferably immersing, aluminum in the treatment solution for at least 2 minutes at 0°C.
本発明者の研究に依れば、少量のアミンを含む水溶液で
あって、そのｐＨを上記の範囲となし、しかも上記特定
の温度で特定時間アルミニウムを上記水溶液と接触せし
めると、着色皮膜がうまくアルミニウム上に形成される
ことが見出された。特に従来の如く、鉄やカルシウムを
何等添加せずにアミン水溶液のｐＨと処理条件とを上記
範囲とすることによりこのような着色皮膜が形成できる
ことは、実に驚くべき知見であって本発明者により初め
て見出された新しい事実である。According to the research of the present inventor, when aluminum is brought into contact with the aqueous solution containing a small amount of amine, the pH of the solution is within the above range, and the above specific temperature is brought into contact with the above aqueous solution for a specific period of time, a colored film can be formed successfully. It has been found that it can be formed on aluminum. In particular, it is a truly surprising finding that such a colored film can be formed by adjusting the pH of the amine aqueous solution and the treatment conditions to the above range without adding any iron or calcium as in the past. This is a new fact discovered for the first time.
本発明に於いては、
（イ）少量のアミンを含む水溶液であって、そのｐＨが
８〜１０の処理液を使用すること、（ロ）アルミニウム
を接触せしめる条件として、５０〜７０℃の温度で、２
分間以上上記処理浴にアルミニウムを接触せしめること
、
である。In the present invention, (a) an aqueous solution containing a small amount of amine with a pH of 8 to 10 is used, and (b) a temperature of 50 to 70°C is used as the condition for contacting aluminum. So, 2
bringing the aluminum into contact with the treatment bath for at least a minute.
上記（イ）及び（ロ）の手段を併用することによって次
のような作用効果を発揮する。By using the means (a) and (b) above in combination, the following effects are achieved.
（ａ）処理温度が低いため処理液の成分が安定し、その
濃度も安定し、絶えず均一な着色皮膜を得ることができ
る。(a) Since the processing temperature is low, the components of the processing liquid are stable, and the concentration thereof is also stable, making it possible to constantly obtain a uniform colored film.
（ｂ）鉄やカルシウムを含有せしめる必要がないのでこ
れら成分による皮膜の耐蝕性低下の問題がない。またこ
れら成分を含有せしめる必要がないので従来法の如くこ
れら成分の量を管理する必要がない。(b) Since there is no need to contain iron or calcium, there is no problem of deterioration of the corrosion resistance of the film due to these components. Furthermore, since there is no need to contain these components, there is no need to control the amounts of these components as in conventional methods.
（ｃ）上記処理液にはアミンの他には原則として他成分
を含有せしめる必要がないので、廃液処理が簡単となる
。(c) Since the above-mentioned treatment liquid does not need to contain other components other than the amine in principle, waste liquid treatment becomes simple.
本発明に於いて上記処理液に含有させるアミンとしては
各種のアミンがあり、原則として従来からベーマイト処
理に使用されてきたアミン類が全て包含される。具体例
としては例えば、モノエタノールアミン、ジエタノール
アミン、トリエタノールアミン、特にトリエタノールア
ミンが好ましい。アミンの含有量は少量でよいが、処理
液のｐＨが上記所定の値になるような量でよく、通常数
％以下程度である。この際ｐＨが８に達しない場合は皮
膜の形成が不充分であり、また逆に１０より高くなると
アルミニウム表面が活性化され、このため皮膜の成長が
生じ難い。In the present invention, there are various amines that can be contained in the treatment liquid, and in principle, all amines conventionally used in boehmite treatment are included. Specific examples include monoethanolamine, diethanolamine, and triethanolamine, particularly triethanolamine. The content of the amine may be small, but may be such that the pH of the treatment liquid reaches the above-mentioned predetermined value, and is usually about several percent or less. At this time, if the pH does not reach 8, the formation of a film is insufficient, and on the other hand, if it becomes higher than 10, the aluminum surface is activated, and therefore, the growth of the film is difficult to occur.
本発明に於いては上記のような処理浴にアルミニウムを
接触、通常は浸漬するがその際の温度を５０〜７０℃と
し、２分以上接触せしめることを必要とする。この際５
０℃未満では皮膜の形成速度が非常に遅く、工業的実施
に適さない。また７０℃より高くなるとアルミニウム表
面の活性化作用が強くなり、皮膜の成長が損なわれる傾
向がある。尚処理時間も２分未満では、皮膜の形成が殆
ど起こらない。この処理時間は２分以上で所望の色調に
合わせて適宜選択すればよい。In the present invention, aluminum is brought into contact with, usually immersed in, the above-mentioned treatment bath, and the temperature at that time must be 50 to 70 DEG C., and the contact must be kept for 2 minutes or more. At this time 5
If the temperature is below 0°C, the rate of film formation is very slow, making it unsuitable for industrial implementation. Moreover, when the temperature is higher than 70°C, the activation effect on the aluminum surface becomes stronger, and the growth of the film tends to be impaired. If the treatment time is less than 2 minutes, almost no film will be formed. The processing time may be appropriately selected from 2 minutes or more depending on the desired color tone.
本発明法の対象となるアルミニウムはＡＣＳＲ等のアル
ミニウム電線が最も好ましいが、着色皮膜の形成が必要
な用途に使用される限り、上記電線に限られず、その他
の各種の用途に使用されるアルミニウムが包含される。The most preferable aluminum to be applied to the method of the present invention is aluminum electric wire such as ACSR, but as long as it is used for purposes that require the formation of a colored film, it is not limited to the above electric wires, and aluminum used for various other purposes may also be used. Included.
実施例１〜９及び比較例１〜７
アミンとしてトリエタノールアミン（ＴＥＡと言う）を
使用し、アルミニウムとしてサンドブラスト処理したＡ
ＣＳＲアルミニウムを使用し、下記第１表に示す所定の
条件で着色皮膜を形成せしめた。得られた皮膜について
その色調、明度（マルカン表示）、及び皮膜の厚さを測
定した。この結果を第１表に併記した。Examples 1 to 9 and Comparative Examples 1 to 7 A using triethanolamine (referred to as TEA) as the amine and sandblasted as the aluminum
A colored film was formed using CSR aluminum under the predetermined conditions shown in Table 1 below. The color tone, brightness (Marcan display), and thickness of the obtained film were measured. The results are also listed in Table 1.
Claims (2)
って少量のアミンを含有する水溶液からなる処理液と、
５０〜７０℃で２分以上接触せしめることを特徴とする
アルミニウムの着色皮膜形成法。Claim 1: A treatment solution consisting of an aqueous solution of aluminum having a pH of 8 to 10 and containing a small amount of amine;
A method for forming a colored film on aluminum, characterized by contacting at 50 to 70°C for 2 minutes or more.
タ ノールアミン、トリエタノールアミンの１種又は２種以
上である請求項（１）に記載の形成法。2. The forming method according to claim 1, wherein the amine is one or more of monoethanolamine, diethanolamine, and triethanolamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2253777A JP3054182B2 (en) | 1990-09-21 | 1990-09-21 | Method for forming colored film on aluminum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2253777A JP3054182B2 (en) | 1990-09-21 | 1990-09-21 | Method for forming colored film on aluminum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04218680A true JPH04218680A (en) | 1992-08-10 |
| JP3054182B2 JP3054182B2 (en) | 2000-06-19 |
Family
ID=17256006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2253777A Expired - Fee Related JP3054182B2 (en) | 1990-09-21 | 1990-09-21 | Method for forming colored film on aluminum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3054182B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10363081B2 (en) | 2012-10-30 | 2019-07-30 | Nitro Medical Limited | Apparatus, probe and method for a cryogenic system |
-
1990
- 1990-09-21 JP JP2253777A patent/JP3054182B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10363081B2 (en) | 2012-10-30 | 2019-07-30 | Nitro Medical Limited | Apparatus, probe and method for a cryogenic system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3054182B2 (en) | 2000-06-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |