JPH028373A - Chromate treatment liquid, its preparation and chromate treatment - Google Patents
Chromate treatment liquid, its preparation and chromate treatmentInfo
- Publication number
- JPH028373A JPH028373A JP15771988A JP15771988A JPH028373A JP H028373 A JPH028373 A JP H028373A JP 15771988 A JP15771988 A JP 15771988A JP 15771988 A JP15771988 A JP 15771988A JP H028373 A JPH028373 A JP H028373A
- Authority
- JP
- Japan
- Prior art keywords
- chromate treatment
- chromate
- anhydrous sodium
- treatment liquid
- liquid
- 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
- 238000011282 treatment Methods 0.000 title claims abstract description 79
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000007788 liquid Substances 0.000 title claims abstract description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 27
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims abstract description 22
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 claims abstract description 20
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000004317 sodium nitrate Substances 0.000 claims abstract description 10
- 235000010344 sodium nitrate Nutrition 0.000 claims abstract description 10
- 229910001369 Brass Inorganic materials 0.000 claims abstract description 9
- 239000010951 brass Substances 0.000 claims abstract description 9
- 238000004043 dyeing Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 26
- 239000000243 solution Substances 0.000 claims description 23
- 239000004480 active ingredient Substances 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000004040 coloring Methods 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 238000005246 galvanizing Methods 0.000 abstract description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 abstract 1
- 239000008397 galvanized steel Substances 0.000 abstract 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 229960000583 acetic acid Drugs 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 238000010186 staining Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000012192 staining solution Substances 0.000 description 2
- -1 70 g/g Chemical compound 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000004532 chromating Methods 0.000 description 1
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はクロメート処理液およびその調合方法並びにク
ロメート処理法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a chromate treatment solution, a method for preparing the same, and a chromate treatment method.
［従来の技術］
鉄鋼製品などの表面処理法として、防錆などを目的とし
た亜鉛めっきが広く行われている。しかし、亜鉛めっき
のみでは耐食性に乏しく不十分であるので、亜鉛めっき
の耐食性を向上させるため、亜鉛表面に化成皮膜を形成
する１方法として、従来よりクロメート処理法が行なわ
れている。[Prior Art] As a surface treatment method for steel products, etc., zinc plating is widely used for purposes such as rust prevention. However, zinc plating alone is insufficient and lacks corrosion resistance, so in order to improve the corrosion resistance of zinc plating, a chromate treatment method has been conventionally used as a method of forming a chemical conversion film on the surface of zinc.
この処理法は、亜鉛もしくは亜鉛を表面に被覆した金属
材料を、クロム酸およびある種のアニオンを含む溶液中
に浸漬することによって、表面にＸＣｌ−２０ｓ ・
−ｖＣｒ−○ｓ・ｙｒｌ１２０で表される耐食性にすぐ
れた化成皮膜を生成させるものである。This treatment method involves immersing zinc or a metal material whose surface is coated in zinc in a solution containing chromic acid and certain anions.
-vCr-○s·yrl120, which produces a chemical conversion film with excellent corrosion resistance.
クロメート処理法に使用するクロメート処理液として、
従来は、無水クローム酸の他、硝酸、硫酸など酸を主体
とする浴組成を用いていた（「めっき技術便覧」：昭和
４６年年月４２５日日刊工業新聞社発行、「金属表面技
術便覧」：昭和６１年年月４３０日日刊工業新聞社発行
）。As a chromate treatment liquid used in the chromate treatment method,
Conventionally, a bath composition consisting mainly of acids such as nitric acid and sulfuric acid in addition to chromic anhydride was used ("Plating Technology Handbook": "Metal Surface Technology Handbook", published by Nikkan Kogyo Shimbun on April 425, 1971). : Published by Nikkan Kogyo Shimbun, 430/1986).
［発明が解決しようとする課題］
しかしながら、従来のクロメート処理液での処理法によ
ると、生成される皮膜が薄く、皮膜の厚みも不均一なも
のであった。しかも、−旦生成した皮膜を、−室以上に
厚くすることは困難であった。したがって、クロメート
処理後に、染色液で材料表面を着色したい場合には、皮
膜の厚みの薄い部分の着色が不十分となって、色むらが
生じ不満足なものしか得られなかった。[Problems to be Solved by the Invention] However, according to the conventional treatment method using a chromate treatment liquid, the film produced is thin and the thickness of the film is non-uniform. Moreover, it was difficult to make the film once formed thicker than the thickness of the film. Therefore, when it is desired to color the surface of the material with a dyeing liquid after the chromate treatment, the thinner parts of the film are insufficiently colored, resulting in uneven coloring and an unsatisfactory result.
本発明は、上記従来技術の欠点を解消し、材料表面に厚
い皮膜を生成可能で、生成した皮膜の厚みを均一・なら
のとし、しかも、皮膜の厚みをコントロールてきるクロ
メート処理液およびその処理液の調合法益ひにクロメー
ト処理法を提供することを目的とする。The present invention solves the above-mentioned drawbacks of the prior art, and provides a chromate treatment solution and its treatment that can produce a thick film on the surface of a material, make the thickness of the film uniform and even, and control the thickness of the film. The purpose of this invention is to provide a chromate treatment method for preparing liquids.
さらに、クロメート処理後に材４′−１表面を染色液て
容易に、かつ、色むらなく着色することを可能とするこ
とをも目的とする。Another object of the present invention is to make it possible to easily and evenly color the surface of the material 4'-1 with a dyeing solution after the chromate treatment.
［課題を解決するための手段］
上記目的を達成するため、本発明にかかるクロメート処
理液の特徴構成は、つぎの組成のものを有効成分とする
ことにある。[Means for Solving the Problems] In order to achieve the above object, the chromate treatment liquid according to the present invention is characterized by having the following composition as an active ingredient.
すなわち、無水クローム酸８０〜２５０ ｇ／ｌｌ！、
水酸化ナトリウム３０〜１５０ ｇ ／ｌｊ！、無水硫
酸ナトリウム０．３〜１５０ｇ／ｌ７、無水硝酸ナトリ
ウム１０〜１５０ｇ／、ｇである。That is, 80-250 g/ll of chromic anhydride! ,
Sodium hydroxide 30-150 g/lj! , anhydrous sodium sulfate 0.3 to 150 g/l7, and anhydrous sodium nitrate 10 to 150 g/g.
本発明にかかるクロメート処理液の調合方法の特徴は、
水溶液に対し無水クローム酸、水酸化ナトリウム、無水
硫酸ナトリウム、無水硝酸ナトリウムをこの順に添加す
ることにある。The characteristics of the method for preparing a chromate treatment liquid according to the present invention are as follows:
The purpose is to add chromic anhydride, sodium hydroxide, anhydrous sodium sulfate, and anhydrous sodium nitrate to an aqueous solution in this order.
本発明にかかるクロメート処理法の特徴は、前記のクロ
メート処理液を用いたことにある。A feature of the chromate treatment method according to the present invention is that the above-mentioned chromate treatment liquid is used.
さらに、本発明にかかるクロメート処理法の特徴は、前
記クロメート処理液を用いてクロメート処理を行った後
、染色液で着色処理することにある。Furthermore, a feature of the chromate treatment method according to the present invention is that after chromate treatment is performed using the chromate treatment liquid, coloring treatment is performed with a staining liquid.
本発明にかかるクロメート処理法の他の特徴は、黄銅を
前記クロメート処理液で処理することにある。Another feature of the chromate treatment method according to the present invention is that brass is treated with the chromate treatment solution.
本発明にかかるクロメート処理法のさらに他の特徴は、
前記クロメート処理液を用いて処理する前にキリンス処
理を行うことにより、無光沢の仕上げ面を得ることにあ
る。Still other features of the chromate treatment method according to the present invention are:
The objective is to obtain a matte finished surface by performing Kirinsu treatment before treatment using the chromate treatment liquid.
［作用・効果］
つぎに、本発明にかかるクロメート−処理液の作用・効
果を説明する。[Function/Effect] Next, the function/effect of the chromate treatment liquid according to the present invention will be explained.
無水クローム酸、水酸化ナトリウム、無水硫酸ナトリウ
ム、無水硝酸ナトリウムの各所定量を有効成分とするク
ロメート処理液を用いているので、従来のクロメート処
理液による処理法では得られない均一、且つ、厚い化成
皮膜を生成させることかてき、しかし、浸漬する時間を
変えることによって、容易に化成皮膜の厚みをコントロ
ールすることかできる９
なお、無水クローノ、酸、水酸化ナトリウム、無水硫酸
ナトリウム、無水硝酸ナトリウムのそれぞれを、８０．
３０．０．３、Ｌｏｇ／ｌ以下であると、均一、且つ、
厚い化成皮膜を生成することがてきない。逆に、無水ク
ローム酸、水酸化ナトリウム、無水硫酸ナトリウム、無
水硝酸ナトリウムのそれぞれを、２５０．１５０．１５
０．１５０ｇ／ｉ！以上とすると、むらのない均一な皮
膜を生成することができない。Since we use a chromate treatment solution containing predetermined amounts of chromic anhydride, sodium hydroxide, anhydrous sodium sulfate, and anhydrous sodium nitrate as active ingredients, we can produce uniform and thick chemical coatings that cannot be obtained with conventional treatment methods using chromate treatment solutions. However, by changing the immersion time, the thickness of the chemical conversion film can be easily controlled. 80. each.
30.0.3, Log/l or less, uniform, and
It is not possible to produce a thick chemical conversion film. Conversely, each of chromic anhydride, sodium hydroxide, anhydrous sodium sulfate, and anhydrous sodium nitrate is 250.150.15
0.150g/i! If this is the case, a uniform film without unevenness cannot be produced.
本発明にかかるクロメート処理液の調合法によれば、反
応による発熱を最小限に抑え、安全で確実にクロメート
処理液を調合することができる。According to the method for preparing a chromate treatment liquid according to the present invention, it is possible to minimize heat generation due to reaction and to prepare a chromate treatment liquid safely and reliably.
本発明にかかるクロメート処理法によれば、材料表面に
厚い皮膜を生成可能で、生成した皮膜の厚みを均一なも
のとし、しかも、皮膜の厚みをコントロールできる。According to the chromate treatment method of the present invention, it is possible to generate a thick film on the surface of a material, and the thickness of the formed film can be made uniform, and furthermore, the thickness of the film can be controlled.
したがって、このクロメート処理後に染色液で着色処理
する場合には、色むらのない、均一で美麗な着色が可能
となる。染色液、あるいは染色液濃度の選択などによっ
て多種多様な着色が簡易に可能となり、種々の用途に適
用可能である。Therefore, when coloring with a dyeing solution is performed after the chromate treatment, uniform and beautiful coloring without color unevenness is possible. A wide variety of colors can be easily achieved by selecting the staining solution or the concentration of the staining solution, and can be applied to various uses.
たとえば、一般の各種装飾品の着色に用いられる他、右
ねじ用ボルトおよびナツトと左ねじ用ボルトおよびナツ
ト、あるいは類似形状の多種類のＩＣ部品などといった
一見して判別しにくいものを色分けすることによって、
混合した場合にも簡易に識別しうるようにすることがで
きる。For example, in addition to being used to color various general ornaments, it can also be used to color-code items that are difficult to distinguish at first glance, such as right-handed bolts and nuts, left-handed bolts and nuts, or many types of IC parts with similar shapes. By,
Even if they are mixed, they can be easily identified.
染料の選択の幅が広く、種々の色調の着色が可能である
ので、たとえば内装部品に使用する場合などにおいては
、周囲の家具に適合した着色も簡単にできるようになる
。Since there is a wide range of dyes to choose from and it is possible to color in various tones, for example, when used for interior parts, it becomes easy to color to match the surrounding furniture.
さらに、本発明にががるクロメート処理を黄銅に施すよ
うにすれば、予め表面に亜鉛めっきを施す必要がなく、
−層簡単、且つ、確実に処理可能となり、その後の着色
処理も容易である。Furthermore, by applying the chromate treatment according to the present invention to brass, there is no need to pre-galvanize the surface.
- The layers can be easily and reliably processed, and the subsequent coloring process is also easy.
前記クロメート処理液を用いて処理する前にキリンス処
理を行うと、無光沢の仕上げ面を得ることかでき、多様
な着色ができることとなる。If Kirinsu treatment is performed before treatment using the chromate treatment liquid, a matte finished surface can be obtained and various colors can be applied.
し実施例１
本発明にかかるクロメート処理液の一実施例として、無
水クロー１．酸を１００ｓτ／′！、水酸化す１ヘリウ
ノ、を７０ｇ／、ｇ、無水硫酸ナトリウｌ、を５０ｇ／
ｌ、無水硝酸ナトリウムを５０ｇ／’７．残り水の割合
からなるりロメート処理浴を作成した。Example 1 As an example of the chromate treatment solution according to the present invention, anhydrous chromate treatment solution 1. Acid at 100sτ/′! , Sodium hydroxide, 70 g/g, Anhydrous sodium sulfate, 1 liter, 50 g/g
l, anhydrous sodium nitrate at 50 g/'7. A Riromate treatment bath was prepared from a proportion of the remaining water.
このときのｐ Ｈは、０６〜１２になるよう調整した。The pH at this time was adjusted to 06-12.
水への添加は、無水クローム酸、水酸化すｌ〜ツリウム
無水硫酸ナトリウム、無水硝酸ナトリウムの順に行った
。このときの水浴は２５０ノの量であった。Chromic anhydride, sulfur hydroxide, thulium anhydrous sodium sulfate, and anhydrous sodium nitrate were added to water in this order. The water bath at this time was 250 tons.
上記浴には、被めっき物に対する表面張力を調整するた
め、界面活性剤などを適量添加してもよい。このように
すれば、試料とクロメート処理液との反応に基づく気泡
を試料表面にほとんど生じさせないので、生成される皮
膜が一層均一となり、着色処理においても色むらがなく
、好ましい結果を得ることができる。An appropriate amount of a surfactant or the like may be added to the bath to adjust the surface tension of the object to be plated. In this way, almost no bubbles are generated on the surface of the sample due to the reaction between the sample and the chromate treatment solution, so the formed film becomes more uniform, and there is no color unevenness during coloring treatment, making it possible to obtain favorable results. can.
また、液ならしをするため、クロメート処理を開始する
前に予め適量の亜鉛華を添加するようにしてもよい。Further, in order to level the solution, an appropriate amount of zinc white may be added in advance before starting the chromate treatment.
ついで、多数の黄銅製のボルトおよびナツトを試料とし
て、上記浴を用いてクロメート処理する方法を、第１図
を参照しつつ説明する。Next, a method of chromating a large number of brass bolts and nuts using the above bath will be explained with reference to FIG.
まず、試料表面に付着している油分を除去するため、予
め脱脂する。脱脂は、溶剤洗浄あるいは酸洗なと適宜選
択して行う。脱脂した後水洗し、上記クロメート処理浴
に試料を浸漬する。このときの液温は１５〜３５℃の範
囲内におまるよう調整した。処理時間は、試料の形状や
量にもよるが５〜３０秒程度であった。First, in order to remove oil adhering to the sample surface, it is degreased in advance. Degreasing is carried out by appropriately selecting solvent cleaning or pickling. After degreasing and washing with water, the sample is immersed in the chromate treatment bath described above. The liquid temperature at this time was adjusted to be within the range of 15 to 35°C. The processing time was about 5 to 30 seconds, depending on the shape and amount of the sample.
ついで、試料を水洗後、染色剤を含む着色槽に試料を浸
漬して、着色した。染色剤は市販の各種のものの使用が
可能であり、広い範囲にわたって着色ができる。着色槽
での処理温度は、８０〜１００℃となるようにし、処理
時間は２〜３分であった。なお、この場合のｐＨ調整は
、酢酸またはアンモニアなどを用いて行う。Next, after washing the sample with water, the sample was immersed in a coloring tank containing a staining agent to be colored. Various commercially available staining agents can be used, and a wide range of colors can be applied. The processing temperature in the coloring tank was set to 80 to 100°C, and the processing time was 2 to 3 minutes. Note that pH adjustment in this case is performed using acetic acid, ammonia, or the like.
この後、適宜水洗、乾燥を行って着色が完了する。も−
・とも、着色状態を長く持続させたい場合には、上記着
色処理後、試ｆｌｋ面にクリア塗装剤などで樹脂コーチ
インクしてもよい。この樹脂は、一般に毒性かなく、燃
えにくくなく、染色剤を容易に溶かさないなどの性７１
をＩＱ ｊ−ているのが好ましい。After this, the coloring is completed by washing with water and drying as appropriate. Mo-
-If you want to maintain the colored state for a long time, you may apply a resin coach ink to the sample flk surface using a clear coating agent or the like after the above coloring treatment. This resin generally has properties such as non-toxic, non-flammable, and does not easily dissolve dyes.
It is preferable to have an IQ j-.
このような一連の処理を行った結果、黄銅製のホルトお
よびナツトについて、色むらがなく均一かつ、容易に退
色しない耐食性の化成皮膜を形成することができた。As a result of such a series of treatments, it was possible to form a corrosion-resistant chemical conversion coating on brass bolts and nuts that was uniform with no color unevenness, and did not easily fade.
なお、鉄鋼製品などの表面に亜鉛めっきしてからクロメ
ート処理をする場合で、亜鉛めっきしてから長期間放置
したようなときには、表面に酸化物が生成されているの
で、この酸化物を予め除去しておく必要がある。この酸
化物除去には、ｐＨを０６〜１２の範囲に調整された従
来の無水クローム酸、硫酸、硝酸、酢酸などからなるク
ロメート処理液に試料を適当時間浸漬すればよい。この
ようにすれば、前記した本発明にかがるクロメート処理
液による処理によって、容易に均一な皮膜か生成する。In addition, when performing chromate treatment after galvanizing the surface of steel products, etc., if the surface has been left for a long time after galvanizing, oxides will have formed on the surface, so remove these oxides beforehand. It is necessary to do so. To remove this oxide, the sample may be immersed for an appropriate period of time in a conventional chromate treatment solution containing chromic anhydride, sulfuric acid, nitric acid, acetic acid, etc. whose pH is adjusted to a range of 06 to 12. In this way, a uniform film can be easily formed by the treatment with the chromate treatment solution according to the present invention described above.
前記水洗は数回繰り返して実施してもよいし、これを湯
洗に替える、あるいは湯洗と併用にしてもよい。The water washing may be repeated several times, or may be replaced with hot water washing, or may be used in combination with hot water washing.
さらに、黄銅などの試料表面を燕光沢に仕十げようと思
えば、本発明にかかるクロメート処理液による処理の前
に、キリンス処理を行えばよい。Furthermore, if it is desired to give the surface of a sample of brass or the like a glossy finish, Kirinsu treatment may be performed before treatment with the chromate treatment solution according to the present invention.
キリンス処理は、通常の硝酸、りん酸、氷酢酸などから
なる処理液に浸漬することによって行う。The Kirinsu treatment is carried out by immersing the specimen in a treatment solution consisting of ordinary nitric acid, phosphoric acid, glacial acetic acid, or the like.
本発明にかかるクロメート処理液を用いた処理法は、黄
銅など亜鉛合金のみならず、予め亜鉛めっきができれば
各種金属材料にも適用可能なものである。The treatment method using the chromate treatment solution according to the present invention is applicable not only to zinc alloys such as brass, but also to various metal materials as long as they can be zinc-plated in advance.
第１図は本発明にかかるクロメート処理法の一実施例を
表すフローチャートである。FIG. 1 is a flowchart representing one embodiment of the chromate treatment method according to the present invention.
Claims (1)
。 （無水クローム酸８０〜２５０ｇ／ｌ 水酸化ナトリウム３０〜１５０ｇ／ｌ 無水硫酸ナトリウム０．３〜１５０ｇ／ｌ 無水硝酸ナトリウム１０〜１５０ｇ／ｌ ２、クロメート処理液を調合するに、水溶液に無水クロ
ーム酸、水酸化ナトリウム、無水硫酸ナトリウム、無水
硝酸ナトリウムをこの順に添加することを特徴とするク
ロメート処理液の調合方法。 ３、請求項１記載のクロメート処理液を用いたクロメー
ト処理法。 ４、請求項１記載のクロメート処理液を用いて処理した
後、染色液で着色処理するクロメート処理法。 ５、黄銅を請求項１記載のクロメート処理液で処理する
ことを特徴とする請求項３または４記載のクロメート処
理法。 ６、請求項１記載のクロメート処理液を用いて処理する
前にキリンス処理を行うことにより、無光沢の仕上げ面
を得るクロメート処理法。[Claims] 1. A chromate treatment liquid containing the following composition as an active ingredient. (Chromic anhydride 80-250g/l Sodium hydroxide 30-150g/l Anhydrous sodium sulfate 0.3-150g/l Anhydrous sodium nitrate 10-150g/l 2. To prepare the chromate treatment solution, add chromic anhydride to the aqueous solution. , sodium hydroxide, anhydrous sodium sulfate, and anhydrous sodium nitrate are added in this order. 3. A chromate treatment method using the chromate treatment solution according to claim 1. 4. Claim 5. A chromate treatment method in which brass is treated with the chromate treatment solution according to claim 1 and then colored with a dyeing solution. 5. A method according to claim 3 or 4, characterized in that brass is treated with the chromate treatment solution according to claim 1. Chromate treatment method. 6. A chromate treatment method in which a matte finished surface is obtained by performing Kirinsu treatment before treatment using the chromate treatment solution according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15771988A JPH028373A (en) | 1988-06-25 | 1988-06-25 | Chromate treatment liquid, its preparation and chromate treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15771988A JPH028373A (en) | 1988-06-25 | 1988-06-25 | Chromate treatment liquid, its preparation and chromate treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH028373A true JPH028373A (en) | 1990-01-11 |
| JPH0536507B2 JPH0536507B2 (en) | 1993-05-31 |
Family
ID=15655878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15771988A Granted JPH028373A (en) | 1988-06-25 | 1988-06-25 | Chromate treatment liquid, its preparation and chromate treatment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH028373A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11273683A (en) * | 1998-03-19 | 1999-10-08 | Furukawa Electric Co Ltd:The | Copper foil for negative electrode current collector of nonaqueous solvent secondary battery and its manufacture |
| WO2010026884A1 (en) * | 2008-09-05 | 2010-03-11 | 日本化学工業株式会社 | Method for producing aqueous solution containing chromium (iii) source |
| JPWO2010026886A1 (en) * | 2008-09-05 | 2012-02-02 | 日本化学工業株式会社 | Method for producing chromium hydroxide |
-
1988
- 1988-06-25 JP JP15771988A patent/JPH028373A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11273683A (en) * | 1998-03-19 | 1999-10-08 | Furukawa Electric Co Ltd:The | Copper foil for negative electrode current collector of nonaqueous solvent secondary battery and its manufacture |
| WO2010026884A1 (en) * | 2008-09-05 | 2010-03-11 | 日本化学工業株式会社 | Method for producing aqueous solution containing chromium (iii) source |
| JPWO2010026884A1 (en) * | 2008-09-05 | 2012-02-02 | 日本化学工業株式会社 | Method for producing an aqueous solution containing a chromium (III) source |
| JPWO2010026886A1 (en) * | 2008-09-05 | 2012-02-02 | 日本化学工業株式会社 | Method for producing chromium hydroxide |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0536507B2 (en) | 1993-05-31 |
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