JPH0796720B2 - Method for electrolytically coloring aluminum materials - Google Patents
Method for electrolytically coloring aluminum materialsInfo
- Publication number
- JPH0796720B2 JPH0796720B2 JP61311244A JP31124486A JPH0796720B2 JP H0796720 B2 JPH0796720 B2 JP H0796720B2 JP 61311244 A JP61311244 A JP 61311244A JP 31124486 A JP31124486 A JP 31124486A JP H0796720 B2 JPH0796720 B2 JP H0796720B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- aluminum material
- coloring
- anodized film
- aluminum
- 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
- 239000000463 material Substances 0.000 title claims description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 38
- 229910052782 aluminium Inorganic materials 0.000 title claims description 36
- 238000000034 method Methods 0.000 title claims description 34
- 238000004040 coloring Methods 0.000 title claims description 22
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 4
- 239000004327 boric acid Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 4
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 4
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000004901 spalling Methods 0.000 description 15
- 238000005868 electrolysis reaction Methods 0.000 description 13
- 230000000052 comparative effect Effects 0.000 description 10
- 239000008151 electrolyte solution Substances 0.000 description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000010407 anodic oxide Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000080590 Niso Species 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000002048 anodisation reaction Methods 0.000 description 1
- 238000007743 anodising Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
- Electrochemical Coating By Surface Reaction (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、陽極酸化処理を施すことにより表面に陽極
酸化皮膜が形成されたアルミニウム材の陽極酸化皮膜を
電解着色する方法に関する。TECHNICAL FIELD The present invention relates to a method for electrolytically coloring an anodized film of an aluminum material having an anodized film formed on its surface by performing anodizing treatment.
この明細書において、「アルミニウム」という語には、
純アルミニウムの他にすべてのアルミニウム合金を含む
ものとする。In this specification, the term "aluminum" refers to
All aluminum alloys shall be included in addition to pure aluminum.
従来の技術 アルミニウム材の表面を電解着色する方法として、アル
ミニウム材表面に形成された陽極酸化皮膜を交流（特に
正弦波交流）電解する方法（いわゆる浅田法）と、アル
ミニウム材を陰極として陽極酸化皮膜を直流（特に平
流）電解する方法（いわゆる住化法）と、矩形波正電圧
と矩形波負電圧とを交互にアルミニウム材に印加する方
法（以下、矩形波インバータ法という）とが知られてい
る。2. Description of the Related Art As a method of electrolytically coloring the surface of an aluminum material, a method of subjecting an anodized film formed on the surface of the aluminum material to AC (especially sinusoidal AC) electrolysis (so-called Asada method) and anodized film using an aluminum material as a cathode There are known a method of electrolyzing direct current (especially normal flow) (so-called Sumika method) and a method of alternately applying a square wave positive voltage and a square wave negative voltage to an aluminum material (hereinafter referred to as a square wave inverter method). There is.
発明が解決しようとする課題 しかしながら、浅田法では、皮膜の着色に要する時間が
比較的長くなるという問題があるとともに、アルミニウ
ム材として、複雑な横断面形状のアルミニウム押出型材
を用いると、凸部の色が凹部の色より濃くなり、アルミ
ニウム材として、長尺のアルミニウム押出型材を用いる
と、端部の色が濃くなるというように、色の付き廻り性
（均一着色性）が悪いという問題がある。However, in the Asada method, there is a problem that the time required for coloring the coating is relatively long, and when an aluminum extrusion mold material having a complicated cross-sectional shape is used as the aluminum material, The color becomes darker than that of the recess, and when a long aluminum extruded material is used as the aluminum material, the color at the edges becomes darker, and there is the problem of poor color distribution (uniform coloring). .
住化法では、比較的短時間で着色が可能であるが、電解
処理中に、陽極酸化皮膜が局部的に破壊されたり、孔が
あいたりするいわゆるスポーリングが発生しやすいとい
う問題がある。In the Sumika method, coloring can be performed in a relatively short time, but there is a problem that so-called spalling such that the anodic oxide film is locally broken or holes are formed is likely to occur during the electrolytic treatment.
矩形波インバータ法では、着色濃度を均一にできるが、
皮膜の着色に要する時間が比較的長くするとともに、ス
ポーリングが生じるという問題がある。With the rectangular wave inverter method, the coloring density can be made uniform,
There are problems that the time required for coloring the film is relatively long and spalling occurs.
この発明の目的は、色の付き廻り性が良いとともにスポ
ーリングが発生しにくく、しかも着色に要する時間が短
いアルミニウム材の電解着色方法を提供することにあ
る。An object of the present invention is to provide an electrolytic coloring method for an aluminum material, which has a good color entrainment property, is less likely to cause spalling, and has a short coloring time.
課題を解決するための手段 この発明によるアルミニウム材の電解着色方法は、表面
に陽極酸化皮膜が形成されたアルミニウム材の陽極酸化
皮膜を電解着色する方法において、硫酸ニッケル20〜15
0g/およびホウ酸10〜50g/を含む水溶液からなる電
解液中において、直流正電圧と、直流負電圧とを交互
に、かつ両者の電圧絶対値を10〜50Vの範囲内で順次大
きくさせながら印加し、直流正電圧と直流負電圧からな
る両極性パルス列の極変換回数を0.6〜60回／秒とする
ことを特徴とするものである。Means for Solving the Problems The method for electrolytically coloring an aluminum material according to the present invention is a method for electrolytically coloring an anodized film of an aluminum material having an anodized film formed on its surface, wherein nickel sulfate 20 to 15 is used.
In an electrolytic solution consisting of an aqueous solution containing 0 g / and boric acid 10 to 50 g /, alternating DC positive voltage and DC negative voltage, and while increasing the absolute value of both voltages sequentially within the range of 10 to 50 V. It is characterized in that the number of polar conversions of the bipolar pulse train consisting of a DC positive voltage and a DC negative voltage applied is 0.6 to 60 times / second.
上記において、１次電解処理により形成される陽極酸化
皮膜には、たとえば公知の方法によって形成される硫酸
陽極酸化皮膜、しゅう酸陽極酸化皮膜、りん酸陽極酸化
皮膜等がある。In the above, examples of the anodized film formed by the primary electrolytic treatment include a sulfuric acid anodized film, an oxalic acid anodized film, and a phosphoric acid anodized film formed by a known method.
上記において、２次電解処理に使用する電解液における
硫酸ニッケルの量を20〜150g/およびホウ酸の量を10
〜50g/としたのは次の理由による。すなわち、硫酸ニ
ッケル量およびホウ酸量が両者の各下限値未満であれば
着色することができず、両者の各上限値を越えても着色
効果は変らず、かえってコストが高くなるとともに廃液
処理が困難になるからである。In the above, the amount of nickel sulfate in the electrolytic solution used for the secondary electrolysis treatment is 20 to 150 g /, and the amount of boric acid is 10
The reason for setting ~ 50g / is as follows. That is, if the amount of nickel sulfate and the amount of boric acid are less than the respective lower limit values, coloring cannot be performed, and even if the amounts exceed the respective upper limit values, the coloring effect does not change, and on the contrary, the cost increases and the waste liquid treatment is performed. Because it will be difficult.
また、直流正電圧および直流負電圧の絶対値を10〜50V
の範囲内で順次大きく変化させるのは、10V未満では、
着色することができず、50Vを越えると、スポーリング
が発生しやすくなるからである。In addition, the absolute value of DC positive voltage and DC negative voltage is 10 to 50V.
In the range of, it is possible to make a large change in sequence below 10V.
This is because it cannot be colored and spalling easily occurs when the voltage exceeds 50V.
また、直流正電圧と直流負電圧からなる両極性パルス列
の極変換回数を0.6〜60回／秒とするのは、0.6回／秒未
満では、スポーリングが発生しやすくなり、60回／秒を
越えると、色の付き廻り性が悪くなるからである。In addition, the number of polar conversions of a bipolar pulse train consisting of a DC positive voltage and a DC negative voltage is set to 0.6 to 60 times / sec. If the number of times is less than 0.6 times / sec, spalling is likely to occur, and 60 times / sec. This is because if it exceeds the limit, the color encircling property will deteriorate.
作用 この発明によるアルミニウム材の電解着色方法は、上述
の構成を有するので、従来の浅田法に比べて、色の付き
廻り性が良くなる。また、従来の住化法に比べて、スポ
ーリングが発生しにくくなる。また、電圧絶対値を順次
大きくさせながら、正電圧と負電圧とを印加しているの
で、電圧を比較的大きくしても、アルミニウム基材と陽
極酸化皮膜との間に形成されるバリヤ層が破壊されず、
したがってスポーリングが生じなくなる。このため、従
来の浅田法、住化法および矩形波インバータ法にくらべ
て、電圧絶対値を大きくすることが可能となり、したが
って、着色に要する時間が短縮される。Action Since the method for electrolytically coloring an aluminum material according to the present invention has the above-mentioned configuration, the color distribution property is improved as compared with the conventional Asada method. In addition, spalling is less likely to occur as compared with the conventional Sumika method. Further, since the positive voltage and the negative voltage are applied while sequentially increasing the absolute voltage value, even if the voltage is relatively increased, the barrier layer formed between the aluminum base material and the anodized film is not formed. Not destroyed,
Therefore, spalling does not occur. Therefore, the absolute voltage value can be increased as compared with the conventional Asada method, Sumika method, and rectangular wave inverter method, and therefore the time required for coloring is shortened.
実 施 例 以下、この発明の実施例を比較例とともに示す。Examples Hereinafter, examples of the present invention will be shown together with comparative examples.
実施例１ A1100−H24からなる板材を３枚用意した。そして、各板
材に、常法通りの硝酸脱硝処理、苛性エッチングおよび
硝酸中和処理を施した。ついでこれらの板材をH2SO415w
t％を含む液温20±１℃の電解液中に浸漬し、電流密度
1.1A/dm2で35分間通常の硫酸陽極酸化処理（１次電解処
理）を施して膜厚９μｍの陽極酸化皮膜を形成した。そ
の後、第１図に示すように、１次電解処理が施された３
枚のアルミニウム材（１）（２）（３）と、板条のカー
ボン対極（４）とを、塩化ビニル製ラック（５）にセッ
トした。対極（４）と最も対極（４）寄りに位置するア
ルミニウム材（１）との距離を200mm、隣り合うアルミ
ニウム材（１）（２）（３）どうしの間隔を10mmとして
おいた。また、各アルミニウム材（１）（２）（３）に
おける対極（４）を向いた側の面の上部の所要箇所を
（1a）（2a）（3a）およびこれと反対側の面の下部の所
要箇所を（1b）（2b）（3b）で示す。そして、このラッ
ク（５）を、NiSO4 50g/、H3BO3 30g/、Na+12ppmお
よびK+6ppm含む電解液中に浸漬した。その後、第２図に
示すように、平流正電圧に正弦波交流電圧が重畳された
脈流正電圧と、平流負電圧に正弦波交流電圧が重畳され
た脈流負電圧とを交互に、かつ電圧絶対値を順次大きく
させながら３分間印加することにより各アルミニウム材
（１）（２）（３）に２次電解処理を施した。この脈流
正電圧と脈流負電圧とからなる両極性パルス列の極変換
回数は２回／秒である。また、印加電圧の絶対値は、10
〜30Vに、徐々に上昇される。正弦波交流電圧の最大絶
対値は2.5Vで、周波数が60Hzである。各アルミニウム
（１）（２）（３）の陽極酸化皮膜はブロンズ色に着色
されていた。また、陽極酸化皮膜には局部的破壊やスポ
ーリングは発生していなかった。Example 1 Three plate materials made of A1100-H24 were prepared. Then, each plate material was subjected to nitric acid denitration treatment, caustic etching and nitric acid neutralization treatment as usual. Then, these plates are put into H 2 SO 4 15w
Immerse in an electrolytic solution containing t% at a liquid temperature of 20 ± 1 ℃
A normal sulfuric acid anodization treatment (primary electrolysis treatment) was performed at 1.1 A / dm 2 for 35 minutes to form an anodized film having a film thickness of 9 μm. Then, as shown in FIG.
The aluminum sheets (1), (2) and (3) and the plate carbon counter electrode (4) were set on a vinyl chloride rack (5). The distance between the counter electrode (4) and the aluminum material (1) located closest to the counter electrode (4) was 200 mm, and the interval between the adjacent aluminum materials (1), (2) and (3) was 10 mm. In addition, in the respective aluminum materials (1), (2) and (3), the required positions on the upper side of the surface facing the counter electrode (4) are changed to (1a) (2a) (3a) and the lower side of the opposite surface. Required locations are indicated by (1b) (2b) (3b). Then, this rack (5) was immersed in an electrolytic solution containing NiSO 4 50 g /, H 3 BO 3 30 g /, Na + 12 ppm and K + 6 ppm. After that, as shown in FIG. 2, the pulsating current positive voltage in which the sinusoidal AC voltage is superimposed on the normal current positive voltage and the pulsating current negative voltage in which the sinusoidal AC voltage is superimposed on the normal current negative voltage are alternately and The aluminum materials (1), (2) and (3) were subjected to secondary electrolysis by applying the voltage for 3 minutes while sequentially increasing the absolute value of the voltage. The number of polar conversions of the bipolar pulse train composed of the positive pulsating current voltage and the negative pulsating current voltage is 2 times / second. The absolute value of the applied voltage is 10
Gradually raised to ~ 30V. The maximum absolute value of the sinusoidal alternating voltage is 2.5V, and the frequency is 60Hz. The anodized film of each aluminum (1) (2) (3) was colored bronze. In addition, the anodic oxide film did not have local damage or spalling.
実施例２ A1100−H24からなる３枚の板材に、上記実施例１と同様
に前処理および１次電解処理を施した。次に、この３枚
の板材を上記実施例１と同様にラックにセットし、上記
実施例１の２次電解処理に使用した電解液のNa+12ppmを
30ppmとし、K+6ppmを12ppmとした電解液中に浸漬して、
上記実施例１と同じ波形の電圧を３分間印加することに
より２次電解処理を施した。その結果、アルミニウム材
表面の陽極酸化皮膜には、スポーリングが発生していな
かった。Example 2 Three plate materials of A1100-H24 were subjected to pretreatment and primary electrolytic treatment in the same manner as in Example 1 above. Next, these three plate materials were set in a rack in the same manner as in Example 1 above, and Na + 12 ppm of the electrolytic solution used for the secondary electrolytic treatment in Example 1 above was added.
30ppm, K + 6ppm to 12ppm in an electrolytic solution,
Secondary electrolysis treatment was performed by applying a voltage having the same waveform as in Example 1 for 3 minutes. As a result, spalling did not occur in the anodized film on the surface of the aluminum material.
比較例１ A1100−H24からなる３枚の板材に上記実施例１と同様に
前処理および１次電解処理を施した。次に、この３枚の
板材を上記実施例１と同様にラックにセットし、上記実
施例１の２次電解処理に使用したのと同じ電解液中に浸
漬して、電圧最大絶対値が15Vで、周波数60Hzの正弦波
交流電圧を６分間印加することにより２次電解処理を施
した。その結果、アルミニウム材表面の陽極酸化皮膜に
は、スポーリングが発生していなかった。Comparative Example 1 As in the case of Example 1, the pretreatment and the primary electrolytic treatment were performed on three plate materials made of A1100-H24. Next, these three plate materials were set in a rack in the same manner as in Example 1 above, and immersed in the same electrolytic solution as that used in the secondary electrolysis treatment in Example 1 above so that the maximum absolute voltage value was 15V. Then, a secondary electrolysis treatment was performed by applying a sinusoidal AC voltage having a frequency of 60 Hz for 6 minutes. As a result, spalling did not occur in the anodized film on the surface of the aluminum material.
実施例２ A1100−H24からなる３枚の板材に上記実施例１と同様に
前処理および１次電解処理を施した。次に、この３枚の
板材を上記実施例１と同様にラックにセットし、上記実
施例１の２次電解処理に使用したのと同じ電解液中に浸
漬して、電圧最大絶対値が15Vの平流負電圧を３分間印
加することにより２次電解処理を施した。その結果、ア
ルミニウム材表面の陽極酸化皮膜には、スポーリングが
発生していた。Example 2 Three plate materials made of A1100-H24 were subjected to pretreatment and primary electrolytic treatment in the same manner as in Example 1 above. Next, these three plate materials were set in a rack in the same manner as in Example 1 above, and immersed in the same electrolytic solution as that used in the secondary electrolysis treatment in Example 1 above so that the maximum absolute voltage value was 15V. A secondary electrolysis treatment was performed by applying a normal-flow negative voltage of 3 minutes. As a result, spalling occurred in the anodized film on the surface of the aluminum material.
比較例３ A1100−H24からなる３枚の板材に上記実施例１と同様に
前処理および１次電解処理を施した。次に、この３枚の
板材を上記実施例１と同様にラックにセットし、上記実
施例１の２次電解処理に使用したのと同じ電解液中に浸
漬して、電圧最大絶対値が15Vで、周波数1Hzの方形波交
流電圧を10分間印加することにより２次電解処理を施し
た。その結果、アルミニウム材表面の陽極酸化皮膜に
は、スポーリングが発生していなかった。Comparative Example 3 Similar to Example 1, the pretreatment and the primary electrolytic treatment were applied to three plate materials made of A1100-H24. Next, these three plate materials were set in a rack in the same manner as in Example 1 above, and immersed in the same electrolytic solution as that used in the secondary electrolysis treatment in Example 1 above so that the maximum absolute voltage value was 15V. Then, a secondary electrolysis treatment was performed by applying a square wave AC voltage having a frequency of 1 Hz for 10 minutes. As a result, spalling did not occur in the anodized film on the surface of the aluminum material.
比較例４ A1100−H24からなる３枚の板材に上記実施例１と同様に
前処理および１次電解処理を施した。次に、この３枚の
板材を上記実施例１と同様にラックにセットし、上記実
施例２の２次電解処理に使用したのと同じ電解液中に浸
漬して、上記比較例３と同じ方形波交流電圧を10分間印
加することにより２次電解処理を施した。その結果、ア
ルミニウム材表面の陽極酸化皮膜には、スポーリングが
発生していた。Comparative Example 4 Three plate materials made of A1100-H24 were subjected to pretreatment and primary electrolytic treatment in the same manner as in Example 1 above. Next, these three plate materials were set on a rack in the same manner as in Example 1 above, and immersed in the same electrolytic solution used for the secondary electrolysis treatment in Example 2 above to obtain the same as Comparative Example 3 above. Secondary electrolysis was performed by applying a square wave AC voltage for 10 minutes. As a result, spalling occurred in the anodized film on the surface of the aluminum material.
実施例１、２および比較例１、３におけるアルミニウム
材（１）（２）（３）表面の各箇所（1a）（1b）（2a）
（2b）（3a）（3b）の明度を示すＬ値の測定結果および
Ｌ値の最大値と最小値との差ΔＬを第１表に示す。Aluminum materials (1), (2) and (3) in Examples 1 and 2 and Comparative Examples 1 and 3 at respective points (1a), (1b) and (2a) on the surface.
Table 1 shows the measurement results of the L value indicating the brightness of (2b), (3a) and (3b) and the difference ΔL between the maximum value and the minimum value of the L value.
第１表から明らかなように、この発明の実施例１、２の
方法では、比較例１の浅田法に比べて、各アルミニウム
間での色調差および１つのアルミニウムの各部間での色
調差が非常に小さくなる。また、比較例２の住化法に対
して実施例１、２の方法では、スポーリングが発生しに
くい。さらに、実施例１および２の方法では、正弦波交
流成分によって比較例３、４の矩形波インバータ法に比
べて電解浴中の１価のカチオンであるNa+およびK+の影
響を受けにくくなり、スポーリングが発生しにくい。し
かも、浅田法、住化法および矩形波インバータ法に比べ
て、印加電圧を大きくできるので、着色に要する時間が
短くなる。 As is clear from Table 1, in the methods of Examples 1 and 2 of the present invention, as compared with the Asada method of Comparative Example 1, the difference in color tone between each aluminum and the difference in color tone between each part of one aluminum are smaller. Very small Further, spalling is less likely to occur in the methods of Examples 1 and 2 as compared to the Sumika method of Comparative Example 2. Further, the methods of Examples 1 and 2 are less susceptible to the effects of monovalent cations Na + and K + in the electrolytic bath than the rectangular wave inverter methods of Comparative Examples 3 and 4 due to the sine wave AC component. , It is hard to spall. Moreover, since the applied voltage can be increased as compared with the Asada method, the Sumika method and the rectangular wave inverter method, the time required for coloring is shortened.
上記実施例１、２においては、二次電解処理において、
平流正電圧に正弦波交流電圧が重畳された脈流正電圧
と、平流負電圧に正弦波交流電圧が重畳された脈流負電
圧とが印加されているが、第３図に示すように、正弦波
交流電圧が重畳されていない直流正電圧と、正弦波交流
電圧が重畳されていない直流負圧とを、交互に、かつ電
圧絶対値を順次大きくさせながら印加するようにしても
よい。In Examples 1 and 2 above, in the secondary electrolytic treatment,
A pulsating current positive voltage in which a sine wave AC voltage is superimposed on a normal current positive voltage and a pulsating current negative voltage in which a sine wave AC voltage is superimposed on a normal current negative voltage are applied, but as shown in FIG. A DC positive voltage on which the sine wave AC voltage is not superimposed and a DC negative pressure on which the sine wave AC voltage is not superimposed may be applied alternately and while increasing the voltage absolute value sequentially.
発明の効果 この発明のアルミニウム材の電解着色方法によれば、色
の付き廻り性が良くかつ電解処理中にスポーリングが発
生しにくいうえに、着色に要する時間も短いという利点
がある。EFFECTS OF THE INVENTION According to the method for electrolytically coloring an aluminum material of the present invention, there are advantages that the coloring property is good, spalling hardly occurs during the electrolytic treatment, and the time required for coloring is short.
第１図は実施例および比較例で使用するラック、ならび
にラックへのアルミニウム材の取付け状態を示す側面
図、第２図は実施例１および２で用いられる電圧波形を
示すタイム・チャート、第３図は、電圧波形の変形例を
示すタイム・チャートである。 （１）（２）（３）……アルミニウム材。FIG. 1 is a side view showing racks used in Examples and Comparative Examples, and a mounting state of an aluminum material on the racks, FIG. 2 is a time chart showing voltage waveforms used in Examples 1 and 2, and FIG. The figure is a time chart showing a modification of the voltage waveform. (1) (2) (3) ... Aluminum material.
Claims (1)
ウム材の陽極酸化皮膜を電解着色する方法において、硫
酸ニッケル20〜150g/およびホウ酸10〜50g/を含む
水溶液からなる電解液中において、直流正電圧と、直流
負電圧とを交互に、かつ両者の電圧絶対値を10〜50Vの
範囲内で順次大きくさせながら印加し、直流正電圧と直
流負電圧からなる両極性パルス列の極変換回数を0.6〜6
0回／秒とすることを特徴とするアルミニウム材の電解
着色方法。1. A method for electrolytically coloring an anodized film of an aluminum material having an anodized film formed on the surface thereof, comprising the steps of using an aqueous solution containing 20 to 150 g / of nickel sulfate and 10 to 50 g / of boric acid, DC positive voltage and DC negative voltage are alternately applied, and the voltage absolute value of both is sequentially increased within the range of 10 to 50 V and applied, and the number of polar conversions of bipolar pulse train consisting of DC positive voltage and DC negative voltage is performed. 0.6 to 6
An electrolytic coloring method for an aluminum material, characterized in that the number is 0 times / second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61311244A JPH0796720B2 (en) | 1986-12-27 | 1986-12-27 | Method for electrolytically coloring aluminum materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61311244A JPH0796720B2 (en) | 1986-12-27 | 1986-12-27 | Method for electrolytically coloring aluminum materials |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63166995A JPS63166995A (en) | 1988-07-11 |
| JPH0796720B2 true JPH0796720B2 (en) | 1995-10-18 |
Family
ID=18014822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61311244A Expired - Lifetime JPH0796720B2 (en) | 1986-12-27 | 1986-12-27 | Method for electrolytically coloring aluminum materials |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796720B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108374191B (en) * | 2018-04-19 | 2019-11-29 | 江苏瑞吉达建材科技有限公司 | A kind of aluminium alloy building-material processing method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5199640A (en) * | 1975-02-28 | 1976-09-02 | Nippon Light Metal Co | Aruminiumumataha sonogokinno chakushokuhoho |
| JPS60208497A (en) * | 1984-03-30 | 1985-10-21 | Nippon Alum Mfg Co Ltd:The | Electrolytic coloring method of aluminum and aluminum alloy |
-
1986
- 1986-12-27 JP JP61311244A patent/JPH0796720B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63166995A (en) | 1988-07-11 |
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