JPS597793B2 - Black coloring method for stainless steel - Google Patents
Black coloring method for stainless steelInfo
- Publication number
- JPS597793B2 JPS597793B2 JP6317476A JP6317476A JPS597793B2 JP S597793 B2 JPS597793 B2 JP S597793B2 JP 6317476 A JP6317476 A JP 6317476A JP 6317476 A JP6317476 A JP 6317476A JP S597793 B2 JPS597793 B2 JP S597793B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- coloring
- color
- coloring method
- black coloring
- 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
Links
Landscapes
- Chemical Treatment Of Metals (AREA)
Description
【発明の詳細な説明】
本発明はステンレス鋼表面に黒色被膜を着色する方法に
関し、特に表面がステンレス鋼製造仕上面のままで、表
面清浄を必要とせずに鮮明で緻密な黒色被膜を得る方法
に関する。[Detailed Description of the Invention] The present invention relates to a method for coloring a black coating on a stainless steel surface, and in particular, a method for obtaining a clear and dense black coating without requiring surface cleaning while leaving the surface as a finished stainless steel manufacturing surface. Regarding.
従来、ステンレス鋼の着色に際しては、その表面に付着
した脂分等を除去することの他、その表面が製造仕上面
（２Ｂ、２Ｄ、ＢＡ仕上等）の場合はその表面に薄い酸
化被膜が発生していることから鮮明な黒色が得られず、
又色ムラ、光沢ムラｂ゛発生するため該被膜を取り除き
、その表面を充分に清浄にすることが必要とされており
、面倒な前処理を必要とし着色コストの上昇をまねいて
いた。Traditionally, when coloring stainless steel, in addition to removing fat and other substances that have adhered to the surface, if the surface is a manufactured surface (2B, 2D, BA finish, etc.), a thin oxide film is formed on the surface. Because of this, clear black color cannot be obtained,
In addition, uneven coloring and uneven gloss occur, so it is necessary to remove the film and thoroughly clean the surface, which requires troublesome pretreatment and increases the cost of coloring.
本発明は前述の如き欠点を克服したステンレス鋼の黒色
着色法としてクロム酸、リン酸および硫酸を主体とした
水溶液に浸漬するいわゆる低温酸化法に関するものであ
る。The present invention relates to a so-called low-temperature oxidation method in which stainless steel is immersed in an aqueous solution mainly containing chromic acid, phosphoric acid, and sulfuric acid as a black coloring method for stainless steel that overcomes the above-mentioned drawbacks.
しかるに低温酸化法としては種々組成の着色液が開発さ
れているが、何れも硫酸の添加量が８００、未満と少な
いものである。However, as a low-temperature oxidation method, colored liquids with various compositions have been developed, but in all of them the amount of sulfuric acid added is small, less than 800%.
本発明は硫酸の添加量を８００〜１２００％となすこと
により、前述の着色前における脂分等の除去及び被着色
材の表面が製造仕上面の場合の酸化被膜の除去等、着色
前の清浄処理を不用となして工程の省略化を図り、かつ
鮮明で均一緻密な黒色被膜を着色可能になしたものであ
り、本発明にかかわる着色溶液の最適組成範囲は、第１
表に示すとおりである。In the present invention, by adjusting the amount of sulfuric acid added to 800 to 1200%, cleaning before coloring can be carried out, such as removing oil before coloring and removing oxide film when the surface of the material to be colored is a manufactured surface. This method eliminates the need for processing, simplifies the process, and makes it possible to color a clear, uniform, and dense black film.The optimal composition range of the coloring solution according to the present invention is
As shown in the table.
第１表
なお、酸化剤としては無水クロム酸、重クロム酸ナトリ
ウム、重クロム酸カリを、また燐酸又は及び燐酸塩とし
ては、燐酸ナトリウム、燐酸一水素エアトリウム、燐酸
二水素一ナトリウムの１種又は２種以上を用いることが
でき、これらの酸化剤および燐酸塩間の着色効果の差異
は殆どみられなかつた。Table 1 Note that the oxidizing agents include chromic anhydride, sodium dichromate, and potassium dichromate, and the phosphoric acid or phosphates include sodium phosphate, airtrium monohydrogen phosphate, and monosodium dihydrogen phosphate. Alternatively, two or more types can be used, and there was almost no difference in coloring effect between these oxidizing agents and phosphates.
硫酸はその量れζ増加するに従い被着色材表面の酸化被
膜及び脂分等の除去が促進され、色むらのない均一な着
色が得られ、８００〜１２００％の濃度範囲が適当であ
つた。As the amount of sulfuric acid increased, the removal of the oxide film and fat on the surface of the material to be colored was promoted, uniform coloring without uneven coloring was obtained, and a concentration range of 800 to 1200% was suitable.
これより高濃度ではステンレス鋼の表面肌が荒れ、光沢
が低下するといつた問題を生じ、下限より低濃度では着
色反応が緩慢となり、色ムラ、光沢ムラが生じ、かつ着
色材は黒色系統の色が発色しない。If the concentration is higher than this, the surface texture of the stainless steel will become rough and the gloss will be reduced, causing problems such as damage.If the concentration is lower than the lower limit, the coloring reaction will be slow, uneven color and gloss will occur, and the colorant will have a blackish color. does not develop color.
酸化剤は２０〜２００％の濃度範囲が適当であり、これ
より高濃度では酸化剤が過飽和となり、浴中に沈澱或は
浮遊物が生成するため色ムラの原因となる。A suitable concentration range for the oxidizing agent is 20 to 200%; if the concentration is higher than this, the oxidizing agent becomes supersaturated and precipitates or suspended matter are formed in the bath, causing color unevenness.
上記下限以下の濃度では表面が荒れ、光沢が低下すると
いう現象がみられた。At a concentration below the above lower limit, a phenomenon was observed in which the surface became rough and the gloss decreased.
燐酸又は及び燐酸塩は３０〜３００％の濃度範囲が適当
であつた。A suitable concentration range for phosphoric acid or phosphates was 30-300%.
この下限以下でぱ色調の再現性に問題があり、上限以上
では光沢ムラを生じた。Below this lower limit, there was a problem in color tone reproducibility, and above this upper limit, uneven gloss occurred.
な卦、浴温度は溶液の蒸発と着色時間を考慮すると１０
０〜１１０℃の範囲が最適であつた。However, considering the evaporation and coloring time of the solution, the bath temperature is 10
The range of 0 to 110°C was optimal.
本発明法はフエラィト系及びオーステナイト系等、一般
のステンレス鋼に適用でき、従来法に比ベステンレス鋼
の表面状態の差卦よび鋼種のちがいによる色彩の差がほ
とんどなく、又有害で高価な６価のクロム酸が少なく、
実用的にすぐれた方法である。な卦、２Ｄ．２Ｂ仕上げ
鋼板は真黒色となり、ＢＡ仕上鋼板は若干黒褐色を呈す
る傾向がある。The method of the present invention can be applied to general stainless steels such as ferritic and austenitic stainless steels, and compared to the conventional method, there is almost no difference in the surface condition of stainless steel or color difference due to different steel types, and there is also no harmful and expensive 6 Low in chromic acid,
This is an excellent practical method. Na trigram, 2D. The 2B finished steel plate tends to be true black, and the BA finished steel plate tends to have a slightly blackish brown color.
以下に本発明の実施例を示す。供試材としてＳＵＳ４３
Ｏ，ＳＵＳ３Ｏ４の２Ｄ，２Ｂ卦よびＢＡ仕上鋼板を用
い、表面清浄処理を全く行わずに第２表に示す条件で着
色処理した。Examples of the present invention are shown below. SUS43 as the sample material
Using 2D, 2B and BA finished steel plates of O, SUS3O4, coloring treatment was carried out under the conditions shown in Table 2 without any surface cleaning treatment.
この結果の着色状態を同表に示す。The resulting colored state is shown in the same table.
な卦、従来法による着色結果も併せて示す。第２表より
従来法では褐色或は茶褐色を呈し、かつステンレス鋼板
の表面状態に基づく色ムラ卦よび光沢ムラが現われてい
るのに対し、本発明法によれば光沢ある、色ムラのない
美麗な黒色被膜が得られた。Also shown are the coloring results obtained using the conventional method. Table 2 shows that the conventional method produces a brown or dark brown color with uneven color and uneven gloss due to the surface condition of the stainless steel sheet, whereas the method of the present invention produces a beautiful, glossy, even-colored plate. A black film was obtained.
Claims (1)
クロム酸ソーダ、重クロム酸カリの１種又は２種以上合
計２０〜２００％と、燐酸、燐酸ナトリウム、燐酸−水
素二ナトリウム、燐酸二水素−ナトリウムの１種又は２
種以上合計３０〜３００ｇ／ｌとを添加した水溶液を加
温し、該水溶液にステンレス鋼を浸漬し着色処理するこ
とを特徴とするステンレス鋼の黒色着色法。1 800 to 1200 g/l of sulfuric acid, a total of 20 to 200% of one or more of chromic acid anhydride, sodium dichromate, and potassium dichromate, phosphoric acid, sodium phosphate, disodium hydrogen phosphate, and dihydrogen phosphate - one or two types of sodium
A method for coloring stainless steel black, characterized by heating an aqueous solution to which a total of 30 to 300 g/l of at least one species is added, and immersing stainless steel in the aqueous solution for coloring treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6317476A JPS597793B2 (en) | 1976-05-31 | 1976-05-31 | Black coloring method for stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6317476A JPS597793B2 (en) | 1976-05-31 | 1976-05-31 | Black coloring method for stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52145346A JPS52145346A (en) | 1977-12-03 |
| JPS597793B2 true JPS597793B2 (en) | 1984-02-21 |
Family
ID=13221622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6317476A Expired JPS597793B2 (en) | 1976-05-31 | 1976-05-31 | Black coloring method for stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS597793B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6110672B2 (en) * | 2013-01-24 | 2017-04-05 | 矢崎エナジーシステム株式会社 | Method for forming high performance selective absorption treatment film |
| CN103397322B (en) * | 2013-07-24 | 2015-09-30 | 西安西光表面精饰有限公司 | Stainless steel Blackening Oxidation |
| CN103397321A (en) * | 2013-07-24 | 2013-11-20 | 西安西光表面精饰有限公司 | Stainless steel black oxidation liquid |
-
1976
- 1976-05-31 JP JP6317476A patent/JPS597793B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52145346A (en) | 1977-12-03 |
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