JPH0571679B2 - - Google Patents
Info
- Publication number
- JPH0571679B2 JPH0571679B2 JP22019385A JP22019385A JPH0571679B2 JP H0571679 B2 JPH0571679 B2 JP H0571679B2 JP 22019385 A JP22019385 A JP 22019385A JP 22019385 A JP22019385 A JP 22019385A JP H0571679 B2 JPH0571679 B2 JP H0571679B2
- Authority
- JP
- Japan
- Prior art keywords
- solution
- sulfuric acid
- anodizing
- bath
- present
- 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 - Fee Related
Links
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 20
- 238000007743 anodising Methods 0.000 claims description 12
- 239000005725 8-Hydroxyquinoline Substances 0.000 claims description 6
- 229960003540 oxyquinoline Drugs 0.000 claims description 6
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 claims description 6
- 239000000243 solution Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011549 displacement method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Printing Plates And Materials Therefor (AREA)
Description
〔産業上の利用分野〕
本発明は陽極酸化処理液に関し、特にアルミニ
ウム又はアルミニウム合金の陽極酸化浴として用
いられる処理液に関する。
〔従来の技術〕
アルミニウム又はその合金（以下単にAlとい
う）は、通常、防食、装飾等の意味で陽極酸化処
理をするとが多い。その陽極酸化処理は硫酸等の
希薄水溶液中で被処理物、すなわちAlを陽極と
し、他の溶解消耗しない通電材（例えば黒鉛、ニ
ツケル等）を陰極として、両極間に電流を通ずる
ことによつて実施される。
〔発明が解決しようとする問題点〕
陽極酸化を硫酸水溶液中で実施した場合、その
通電中に陰極、陽極を問わず、かなりの気体の発
生が認められる。この現象は、水溶液中の水分の
電気分解によるものであり、陰極には水素、陽極
には酸素が発生する。ところで、これらの気体が
発生する場合は、通常気泡となつて溶液から空中
に流出するが、その際少量の溶液とともにいわゆ
るミストの状態となつて出てゆくことが多い。こ
れらミストは、溶液中の成分をそのまま含んでい
るため、作業環境を著しく汚染し、処理装置の寿
命を短くすることはいうまでもなく、作業者の健
康を著しく害する。
〔問題点を解決するための手段〕
本発明者は、上記従来技術における有害なミス
トの発生を防ぐため、硫酸系陽極酸化処理浴に添
加剤を加える研究を重ねた結果、８−ヒドロキシ
キノリンを添加することにより発泡量を大幅に低
減させうることを見出した。本発明はこの知見に
よつて完成されたものであつて、硫酸水溶液に、
８−ヒドロキシキノリンを加えてなることを特徴
とする陽極酸化処理液である。
本発明において硫酸を主体とする陽極酸化処理
液に添加する８−ヒドロキシキノリンの量は0.01
〜40ｇ／、好ましくは１〜30ｇ／であり、主
沿である硫酸水溶液の硫酸濃度は0.01〜5.0mol／
、好ましくは0.1〜3.0mol／、特に好ましく
は0.9〜2.3mol／である。陽極酸化処理時の液
温は凝固点〜沸点の間の任意の温度でよく、電流
密度は0.5A／ｄm2以上、好ましくは0.5〜3.0A／
ｄm2、特に好ましくは0.8〜2.0A／ｄm2である。
本発明の陽極酸化処理液を使用すれば、気泡の
発生量は硫酸単浴の時の少なくとも80％、最大
0.1％の程度まで減少させることが可能である。
以下、本発明の具体的な実施例をあげ本発明を
更に詳述する。
実施例 １
硫酸1.5mol／からなる陽極酸化処理液を調
製し、８−ヒドロキシキノリンを添加剤として
0.2ｇ／加え、この浴中でJISA1100を電流密度
1.2A／ｄm2、浴温５℃で１時間陽極酸化し、発
生する気体を液上置換法で採取した。
実施例 ２
硫酸1.7mol／からなる陽極酸化処理液を調
製し、８−ヒドロキシキノリンを添加剤として30
ｇ／加え、この浴中でJISA1100を電流密度
1.2A／ｄm2、浴温５℃で１時間陽極酸化し、発
生する気体を液上置換法で採取した。
比較例 １〜２
上記実施例のそれぞれ添加剤を加えない条件で
陽極酸化し、実施例と同一の方法で発生気体を採
取した。
実施例１〜２、比較例１〜２の発生気体量の測
定結果を下記表１に示す。
[Industrial Field of Application] The present invention relates to an anodizing solution, and particularly to a solution used as an anodizing bath for aluminum or aluminum alloys. [Prior Art] Aluminum or its alloy (hereinafter simply referred to as Al) is usually subjected to anodizing treatment for corrosion protection, decoration, etc. The anodic oxidation treatment is carried out in a dilute aqueous solution such as sulfuric acid, using the object to be treated, that is, Al, as the anode and another non-dissolving and consumable current-carrying material (e.g. graphite, nickel, etc.) as the cathode, by passing a current between the two electrodes. Implemented. [Problems to be Solved by the Invention] When anodic oxidation is carried out in an aqueous sulfuric acid solution, a considerable amount of gas is generated during energization, regardless of whether it is at the cathode or the anode. This phenomenon is caused by electrolysis of water in an aqueous solution, and hydrogen is generated at the cathode and oxygen at the anode. By the way, when these gases are generated, they usually form bubbles and flow out from the solution into the air, but in this case, they often come out in the form of a so-called mist together with a small amount of the solution. Since these mist contains the components in the solution as they are, they significantly pollute the working environment, shorten the life of the processing equipment, and seriously harm the health of the workers. [Means for Solving the Problems] In order to prevent the generation of harmful mist in the above-mentioned conventional technology, the present inventor conducted repeated research on adding additives to the sulfuric acid-based anodizing treatment bath, and as a result, discovered that 8-hydroxyquinoline was added to the bath. It has been found that the amount of foaming can be significantly reduced by adding it. The present invention was completed based on this knowledge, and the present invention is based on this knowledge.
This is an anodizing solution characterized by adding 8-hydroxyquinoline. In the present invention, the amount of 8-hydroxyquinoline added to the anodizing solution mainly containing sulfuric acid is 0.01
~40g/, preferably 1~30g/, and the sulfuric acid concentration of the main sulfuric acid aqueous solution is 0.01~5.0mol/
, preferably 0.1 to 3.0 mol/, particularly preferably 0.9 to 2.3 mol/. The liquid temperature during anodizing treatment may be any temperature between freezing point and boiling point, and the current density is 0.5 A/ dm2 or more, preferably 0.5 to 3.0 A/dm2.
dm 2 , particularly preferably 0.8 to 2.0 A/dm 2 . If the anodizing treatment solution of the present invention is used, the amount of bubbles generated will be at least 80% of that of a single sulfuric acid bath, and the maximum
It is possible to reduce it to the extent of 0.1%. Hereinafter, the present invention will be explained in further detail by giving specific examples of the present invention. Example 1 An anodizing solution consisting of 1.5 mol of sulfuric acid was prepared, and 8-hydroxyquinoline was added as an additive.
Add 0.2g/JISA1100 in this bath at current density.
Anodic oxidation was carried out at 1.2 A/dm 2 and a bath temperature of 5° C. for 1 hour, and the generated gas was collected by liquid displacement method. Example 2 An anodizing solution consisting of 1.7 mol of sulfuric acid was prepared, and 8-hydroxyquinoline was added as an additive.
g/add and JISA1100 in this bath at current density
Anodic oxidation was carried out at 1.2 A/dm 2 and a bath temperature of 5° C. for 1 hour, and the generated gas was collected by liquid displacement method. Comparative Examples 1 and 2 Anodic oxidation was carried out under conditions in which no additives were added in each of the above Examples, and the generated gas was collected in the same manner as in the Examples. The measurement results of the amount of gas generated in Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Table 1 below.
以上の実施例に示す通り本発明による陽極酸化
処理液は、従来浴と比して処理時の発泡が著しく
少なく、発泡による不具合を全て解決することが
できる。
As shown in the above examples, the anodizing solution according to the present invention causes significantly less foaming during treatment than conventional baths, and can solve all problems caused by foaming.
Claims (1)
えてなることを特徴とする陽極酸化処理液。1. An anodizing solution characterized by adding 8-hydroxyquinoline to an aqueous sulfuric acid solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22019385A JPS6280294A (en) | 1985-10-04 | 1985-10-04 | Treating solution for anodic oxidation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22019385A JPS6280294A (en) | 1985-10-04 | 1985-10-04 | Treating solution for anodic oxidation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6280294A JPS6280294A (en) | 1987-04-13 |
| JPH0571679B2 true JPH0571679B2 (en) | 1993-10-07 |
Family
ID=16747341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22019385A Granted JPS6280294A (en) | 1985-10-04 | 1985-10-04 | Treating solution for anodic oxidation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6280294A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0778280B2 (en) * | 1988-07-28 | 1995-08-23 | 株式会社日立製作所 | Metal anti-corrosion surface treatment method |
| JPH0768638B2 (en) * | 1988-11-02 | 1995-07-26 | 株式会社日立製作所 | Metal anti-corrosion surface treatment method |
-
1985
- 1985-10-04 JP JP22019385A patent/JPS6280294A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6280294A (en) | 1987-04-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |