JPS6234831B2 - - Google Patents
Info
- Publication number
- JPS6234831B2 JPS6234831B2 JP54042778A JP4277879A JPS6234831B2 JP S6234831 B2 JPS6234831 B2 JP S6234831B2 JP 54042778 A JP54042778 A JP 54042778A JP 4277879 A JP4277879 A JP 4277879A JP S6234831 B2 JPS6234831 B2 JP S6234831B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- steel strip
- potential difference
- color tone
- 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.)
- Expired
Links
- 229910001220 stainless steel Inorganic materials 0.000 claims description 48
- 239000010935 stainless steel Substances 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 18
- 238000004040 coloring Methods 0.000 claims description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 16
- 238000007654 immersion Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 10
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 9
- 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 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 14
- 239000007788 liquid Substances 0.000 description 7
- 229910052697 platinum Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000004744 fabric Substances 0.000 description 5
- 239000011259 mixed solution Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000005238 degreasing Methods 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000003925 fat Substances 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/77—Controlling or regulating of the coating process
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Description
【発明の詳細な説明】
本発明はステンレス帯鋼の生地表面に発色被膜
を形成することにより、これを各種色調に発色す
る方法に関し、とくに帯鋼の発色を連続しておこ
なう方法の改良に係るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of coloring stainless steel strips in various tones by forming a coloring film on the surface of the material, and particularly relates to an improvement in the method of continuously coloring stainless steel strips. It is something.
近年装飾品などに用いられるステンレス鋼生地
に対して表面に発色被膜（酸化被膜）を形成し、
もつて金属光沢を有する各種色調の発色を施す方
法が開発され、すでに実用化の段階に入つてい
る。この技術は最初英国特許第275761号明細書で
開示され、その他これに関するものとして同第
1122172号明細書、同第1122173号明細書などがあ
る。この方法はいづれもステンレス鋼生地表面を
予め十分研摩しておき、これを硫酸とクロム酸と
の混液中に浸漬せしめてその表面に発色被膜を形
成し、さらにこの発色被膜をリン酸とクロム酸と
の混液中で電解による硬化処理を施し、もつてス
テンレス鋼生地表面に金属光沢を有する各種色調
の発色を施すようにしたものである。 In recent years, a colored film (oxide film) has been formed on the surface of stainless steel fabrics used for decorative items, etc.
A method for producing various tones with metallic luster has been developed and is already in the stage of practical application. This technology was first disclosed in British Patent No. 275761, and other references in this regard include British Patent No. 275761;
There are specifications such as No. 1122172 and No. 1122173. In each of these methods, the surface of the stainless steel fabric is sufficiently polished in advance, and then immersed in a mixture of sulfuric acid and chromic acid to form a colored film on the surface. The stainless steel fabric is hardened by electrolysis in a mixture with the stainless steel material, and the surface of the stainless steel fabric is colored in various tones with a metallic luster.
しかるに発色被膜は上記混液の液組成、液温あ
るいはステンレス鋼の表面性状などに大きな影響
を受けるため、所望の色調のステンレス鋼を得る
にはその管理を的確におこなう必要がある。この
ようなことから発色中のステンレス鋼と照合電極
との間の電位差が、その発色被膜の膜厚にもとづ
き経時的に変化し、その経時変化も特徴的である
ことに着目し、この電位差を監視することによつ
て色調を制御する方法が提案されている。 However, since the colored coating is greatly affected by the liquid composition and temperature of the liquid mixture, the surface properties of the stainless steel, etc., it is necessary to control them accurately in order to obtain stainless steel of the desired color tone. For this reason, we focused on the fact that the potential difference between the stainless steel during color development and the reference electrode changes over time based on the thickness of the coloring film, and that this change over time is also characteristic. Methods have been proposed to control color tone by monitoring.
この制御方法は、ステンレス鋼板等の単品に発
色被膜を形成する場合にはきわめて有効である
が、ステンレス帯鋼を混液中に連続的に浸漬する
場合、被膜を形成していない新たな帯鋼が順次浸
漬されるので照合電極と帯鋼との電位差が経時的
に変化することなく一定となり、この制御方法を
利用することはできない。 This control method is extremely effective when forming a colored coating on a single item such as a stainless steel plate, but when stainless steel strip is continuously immersed in a mixed solution, new strip steel without a coating is formed. Since the electrodes are immersed in sequence, the potential difference between the reference electrode and the steel strip remains constant without changing over time, and this control method cannot be used.
しかも電位差が一定といつても、ステンレス鋼
の材質、表面性状、混液の液組成、液温などによ
つて大きな影響を受け、別のステンレス帯鋼に発
色処理を施こす際に、前回と同じ電位差となるよ
うにステンレス帯鋼の浸漬時間を制御したとして
も同じ色調のものが得られるとは限らない。 Moreover, even if the potential difference is said to be constant, it is greatly affected by the stainless steel material, surface texture, liquid composition of the mixed liquid, liquid temperature, etc. Even if the immersion time of the stainless steel strip is controlled to create a potential difference, it is not always possible to obtain the same color tone.
このようなことから従来はステンレス帯鋼に連
続的に着色処理する場合、もつばら勘と経験とに
もとづいてステンレス帯鋼の浸漬時間を制御して
所望の色調のものを得るようにしており、このた
め作業が煩雑であるとともに品質管理上問題があ
つた。 For this reason, conventionally, when continuously coloring stainless steel strips, the soaking time of the stainless steel strips was controlled based on intuition and experience in order to obtain the desired color tone. This made the work complicated and caused problems in terms of quality control.
本発明は上記事情に鑑みてなされたもので、そ
の目的とするところは、ステンレス帯鋼を発色し
た場合にも、得られる色調と電位差との間に関連
があることに着目し、電位差を監視しながら、ス
テンレス帯鋼の浸漬時間を制御することにより、
ステンレス帯鋼の品質管理を的確におこなうこと
ができるステンレス帯鋼の連続発色方法を提供す
るものである。 The present invention has been made in view of the above circumstances, and its purpose is to monitor the potential difference by focusing on the fact that there is a relationship between the color tone obtained and the potential difference even when stainless steel strip is colored. By controlling the soaking time of the stainless steel strip,
The present invention provides a continuous coloring method for stainless steel strip that can accurately control the quality of stainless steel strip.
すなわち本発明はステンレス帯鋼を硫酸とクロ
ム酸との混液中に連続的に浸漬せしめて、その表
面に発色被膜を形成するステンレス帯鋼の連続発
色方法において、上記帯鋼の発色被膜の膜厚又は
色調と浸漬時の電位差との関係を予じめ測定し、
ついで上記帯鋼を混液中連続的に浸漬して発色被
膜を生成せしめ、該被膜と所望する発色被膜との
差を上記関係にもとづいて電位差の差異に換算
し、この差異にもとづいてステンレス帯鋼の浸漬
時間を制御することを特徴とするステンレス帯鋼
の連続発色方法である。 That is, the present invention provides a continuous coloring method for stainless steel strip in which a stainless steel strip is continuously immersed in a mixed solution of sulfuric acid and chromic acid to form a colored coating on the surface of the stainless steel strip. Or, measure the relationship between color tone and potential difference during immersion in advance,
Next, the above steel strip is continuously immersed in the mixed solution to form a colored film, and the difference between the film and the desired colored film is converted into a difference in potential difference based on the above relationship, and based on this difference, the stainless steel strip is This is a continuous coloring method for stainless steel strip, which is characterized by controlling the immersion time.
以下本発明方法を詳細に説明する。 The method of the present invention will be explained in detail below.
まずステンレス帯鋼素材の前処理として表面仕
上げを行なう。この表面仕上げはたとえばバフ、
化学研摩その他で研摩仕上げを行なうが、他に素
材生地に対し予じめエツチング加工やエンボス加
工を施すなど模様付仕上げを併用してもよい。な
お表面仕上げで研摩むらなどがあると発色時に色
むらの原因となることがあるので表面仕上げは念
入りに行なう。次にこれを脱脂および水洗工程に
かけ、ここで油脂類や塵埃を完全に除去する必要
がある。この脱脂は一般にアルカリ液に浸漬する
方法又は電解により脱脂する方法など通常行なわ
れている方法で行なう。 First, surface finishing is performed as a pretreatment for the stainless steel strip material. This surface finish is, for example, buffed,
Polishing is performed by chemical polishing or other methods, but a patterned finish such as etching or embossing may be applied to the material fabric in advance. Note that if there is any unevenness in the surface finish, such as uneven polishing, it may cause uneven coloring during color development, so be careful when finishing the surface. This is then subjected to a degreasing and water washing process to completely remove fats, oils, and dust. This degreasing is generally carried out by a commonly used method such as immersion in an alkaline solution or degreasing by electrolysis.
このような前処理が完了した後第１図に示すよ
うにステンレス帯鋼１を硫酸とクロム酸との混液
を入れた処理槽２内に順次連続的に浸漬せしめて
その表面に発色被膜を形成する。この処理に用い
る硫酸とクロム酸との混液は、上記帯鋼１の表面
に短時間で均一に発色被膜を生成させる作用をな
すもので、その混合比は通常硫酸450／550ｇ／
に対してクロム酸が240〜300ｇ／が適当で、こ
れを70〜90℃に加熱して使用するのが望ましい。
また上記帯鋼１を処理槽２内に滞在させる時間
は、処理槽２内に浸漬した白金等の対極３とステ
ンレス帯鋼１との間の電位差にもとずいて制御さ
れる。以下浸漬時間の制御方法について詳細に説
明する。 After such pretreatment is completed, the stainless steel strip 1 is sequentially and continuously immersed in a treatment tank 2 containing a mixture of sulfuric acid and chromic acid to form a colored film on its surface, as shown in Fig. 1. do. The mixed solution of sulfuric acid and chromic acid used in this treatment has the effect of uniformly forming a colored film on the surface of the steel strip 1 in a short time, and the mixing ratio is usually 450g/550g of sulfuric acid/
A suitable amount of chromic acid is 240 to 300 g per amount, and it is desirable to use this by heating it to 70 to 90°C.
Further, the time period during which the steel strip 1 is allowed to stay in the treatment tank 2 is controlled based on the potential difference between the counter electrode 3 made of platinum or the like immersed in the treatment tank 2 and the stainless steel strip 1. The method for controlling the immersion time will be explained in detail below.
まず第２図の曲線ａ，ｂ，ｃに示すようにステ
ンレス帯鋼１を処理槽２内に連続的に浸漬した際
の白金照合電極に対する電位差と発色被膜の膜厚
あるいは色調との関係を測定しておく。ここで色
調は、発色被膜の膜厚に対応し、例えば青は0.1
μｍ、緑は0.34μｍである。第２図から明らかな
ように同じ発色被膜の膜厚（色調）であつても白
金照合電極との電位差が同じとは限らない。これ
はステンレス帯鋼１の材質、表面性状、混液の組
成、液温などにより微妙な影響を受けるためであ
る。しかし白金照合電極との電位差と膜厚（色
調）との関係を示す直線はいずれも傾斜角度が同
じであり、このため各色調間における電位差の差
異は一定となる。例えば「青」と「緑」との間で
は4.8mV、「青」と「灰色」との間では1.5mVで
ある。この理由は明確ではないが、被膜の成長メ
カニズムは、多少の条件変動においても変わら
ず、同一であると考えられるからである。 First, as shown in curves a, b, and c in Fig. 2, the relationship between the potential difference with respect to the platinum reference electrode and the thickness or color tone of the coloring film when the stainless steel strip 1 is continuously immersed in the treatment tank 2 is measured. I'll keep it. Here, the color tone corresponds to the thickness of the coloring film, for example, blue is 0.1
μm, green is 0.34 μm. As is clear from FIG. 2, even if the coloring film has the same thickness (color tone), the potential difference with the platinum reference electrode is not necessarily the same. This is because it is subtly influenced by the material of the stainless steel strip 1, the surface properties, the composition of the mixed liquid, the liquid temperature, etc. However, the straight lines showing the relationship between the potential difference with the platinum reference electrode and the film thickness (color tone) all have the same inclination angle, so the difference in potential difference between each color tone is constant. For example, the voltage between "blue" and "green" is 4.8mV, and the voltage between "blue" and "gray" is 1.5mV. Although the reason for this is not clear, it is thought that the growth mechanism of the film remains the same even under slight variations in conditions.
次に実際の処理工程において、任意の浸漬時間
でステンレス帯鋼１を処理槽２内に連続的に浸漬
せしめて、この表面に発色被膜を生成する。この
処理における白金照合電極との電位差を測定し、
さらに発色被膜の膜厚又は色調を調べる。ついで
この色調と所望する色調との差異を第２図にもと
づいで調べ、所望する色調の電位差となるように
ステンレス帯鋼１の浸漬時間を制御する。例えば
始めの発色被膜の色調が「灰色」で所望する色調
が「青」の場合はその電位差の差異は1.5mVであ
るから、浸漬時間を短かくして白金照合電極との
電位差が始めの測定電位差から1.5mV差し引いた
値となるように制御する。また逆に始めの発色被
膜の色調が「灰色」で所望する色調が「金」の場
合は、その電位差の差異は0.9mVであり、ここで
は浸漬時間を長くして始めの測定電位差に0.9mV
を加えた値となるように制御する。 Next, in the actual treatment process, the stainless steel strip 1 is continuously immersed in the treatment bath 2 for an arbitrary immersion time to form a colored film on its surface. Measure the potential difference with the platinum reference electrode during this process,
Furthermore, the thickness or color tone of the colored film is examined. Next, the difference between this color tone and the desired color tone is investigated based on FIG. 2, and the immersion time of the stainless steel strip 1 is controlled so as to obtain the potential difference of the desired color tone. For example, if the color tone of the initial colored film is "gray" and the desired color tone is "blue", the difference in potential difference is 1.5 mV, so the immersion time can be shortened so that the potential difference with the platinum reference electrode is lower than the initial measured potential difference. Control so that the value is subtracted by 1.5mV. Conversely, if the initial color tone of the colored film is "gray" and the desired color tone is "gold," the difference in potential difference is 0.9 mV, so here, by increasing the immersion time, the initial measured potential difference is 0.9 mV.
control so that the value is the sum of
このようにして所望の色調となつた時点で、以
降その電位差が一定となるように浸漬時間を制御
してステンレス帯鋼１を順次発色処理していく。 When the desired color tone is obtained in this way, the stainless steel strip 1 is sequentially subjected to color development treatment by controlling the immersion time so that the potential difference becomes constant.
このように電位差にもとづいて浸漬時間を制御
することによりステンレス帯鋼１の発色を的確に
おこなえ品質管理上きわめて好適となる。この場
合浸漬時間の制御は手動でおこなうようにしても
よいが、電位差の差異を自動的に検知して、この
検知信号をステンレス帯鋼１を移送する駆動源へ
フイードバツクして浸漬時間の制御を自動的にお
こなうようにしてもよい。 By controlling the immersion time based on the potential difference in this way, the stainless steel strip 1 can be colored accurately, which is very suitable for quality control. In this case, the immersion time may be controlled manually, but the immersion time may be controlled by automatically detecting the difference in potential and feeding back this detection signal to the drive source that transports the stainless steel strip 1. This may be done automatically.
なおこのようにして発色被膜を生成したステン
レス帯鋼１は水洗後、リン酸とクロム酸との混液
中で電解して硬化処理がなされる。 After washing the stainless steel strip 1 with the colored film formed in this manner, it is hardened by electrolysis in a mixed solution of phosphoric acid and chromic acid.
次に本発明の具体的実施例につき説明する。 Next, specific examples of the present invention will be described.
SUS304ステンレス帯鋼を表面仕上げ及び脱脂
処理した後、これを硫酸500ｇ／とクロム酸250
ｇ／との混液（80℃）を入れた浸漬有効長さ
3500mmの発色処理槽中に送り速度100cm／分で順
次3.5分間浸漬させた。この状態でステンレス帯
鋼の表面には「灰色」の発色被膜が形成され、又
白金電極との電位差は−205.0mVであつた。この
実施例では「青」の色調を得るために、送り速度
を110cm／分と速めて電位差を「灰色」の電位差
より1.5mV低い−206.5mVとした。その後−
206.5mVを保持するように送り速度を制御して発
色処理をおこなつた。 After surface finishing and degreasing SUS304 stainless steel strip, it was mixed with 500 g of sulfuric acid and 250 g of chromic acid.
Effective length of immersion with g/mixture (80℃)
The samples were sequentially immersed in a 3500 mm coloring treatment bath for 3.5 minutes at a feed rate of 100 cm/min. In this state, a "gray" colored film was formed on the surface of the stainless steel strip, and the potential difference with the platinum electrode was -205.0 mV. In this example, in order to obtain a "blue" color tone, the feed rate was increased to 110 cm/min and the potential difference was -206.5 mV, which is 1.5 mV lower than the "gray" potential difference. After that-
Color development was performed by controlling the feeding speed to maintain a voltage of 206.5 mV.
このようにして得られたステンレス帯鋼は表面
の色調が均一であり、品質が極めて優れているこ
とが確認された。 It was confirmed that the stainless steel strip thus obtained had a uniform surface color tone and was of extremely high quality.
以上説明したように本発明によれば、発色被膜
を生成するに際し、被膜の膜厚（色調）と電位差
との間に一定の関係があることをに着目し、この
関係にもとづいてステンレス帯鋼の浸漬時間を制
御するようにしたので、その制御を的確におこな
えしかも自動化を図ることができ、又色調を均質
にできるなど顕著な効果を奏する。 As explained above, according to the present invention, when producing a colored film, it is noted that there is a certain relationship between the film thickness (color tone) of the film and the potential difference, and based on this relationship, stainless steel strip is Since the dipping time is controlled, the control can be performed accurately and automated, and the color tone can be made uniform, which is a remarkable effect.
第１図は、本発明の一実施例を示し、ステンレ
ス帯鋼の連続発色装置の断面図、第２図は電位差
と発色被膜の膜厚（色調）との関係を示した特性
図である。
１…ステンレス帯鋼、２…処理槽、３…対極。
FIG. 1 shows an embodiment of the present invention, and is a sectional view of a continuous coloring device for stainless steel strip, and FIG. 2 is a characteristic diagram showing the relationship between the potential difference and the thickness (color tone) of the coloring film. 1... Stainless steel strip, 2... Treatment tank, 3... Counter electrode.
Claims (1)
入れた処理槽中に連続的に浸漬せしめて、その表
面に発色被膜を形成するステンレス帯鋼の連続発
色方法において、上記帯鋼の発色被膜の膜厚又は
色調と、処理槽に連続的に浸漬した時における帯
鋼と照合電極との電位差との関係を予め測定する
工程と、上記帯鋼を硫酸とクロム酸との混液中に
連続的に浸漬してその表面に発色被膜を形成せし
めてこの処理におけるステンレス帯鋼と照合電極
との電位差を測定し、更に当該発色被膜の膜厚又
は色調を測定する工程と、当該被膜の膜厚又は色
調と所望する発色被膜の膜厚又は色調との差を上
記予め測定した関係にもとずいて電位差の差異に
換算する工程と、ステンレス帯鋼の浸漬時間を制
御してこの電位差の差異を解消する工程とを具備
したことを特徴とするステンレス帯鋼の連続発色
方法。1. In a continuous coloring method for stainless steel strip, in which a stainless steel strip is continuously immersed in a treatment tank containing a mixture of sulfuric acid and chromic acid to form a colored film on the surface, the colored film on the steel strip is A process of measuring in advance the relationship between the film thickness or color tone and the potential difference between the steel strip and a reference electrode when continuously immersed in a treatment tank, and continuously immersing the steel strip in a mixture of sulfuric acid and chromic acid. A step of immersing the stainless steel strip to form a colored film on its surface, measuring the potential difference between the stainless steel strip and the reference electrode during this treatment, and further measuring the thickness or color tone of the colored film, and the step of measuring the thickness or color tone of the colored film. and converting the difference between the film thickness or color tone of the desired colored film into a difference in potential difference based on the above-mentioned pre-measured relationship, and controlling the immersion time of the stainless steel strip to eliminate this difference in potential difference. A continuous coloring method for stainless steel strip, characterized by comprising the steps of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4277879A JPS55134177A (en) | 1979-04-09 | 1979-04-09 | Continuous coloring method for stainless steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4277879A JPS55134177A (en) | 1979-04-09 | 1979-04-09 | Continuous coloring method for stainless steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55134177A JPS55134177A (en) | 1980-10-18 |
| JPS6234831B2 true JPS6234831B2 (en) | 1987-07-29 |
Family
ID=12645416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4277879A Granted JPS55134177A (en) | 1979-04-09 | 1979-04-09 | Continuous coloring method for stainless steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55134177A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6169979A (en) * | 1984-09-12 | 1986-04-10 | Nisshin Steel Co Ltd | Continuous coloring method of stainless steel strip |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5147544A (en) * | 1974-10-22 | 1976-04-23 | Nippon Steel Corp | Sutenresukono chakushokuseigyoho |
| JPS5334636A (en) * | 1976-09-13 | 1978-03-31 | Nippon Kinzoku Co Ltd | Continuous pigmentation process for stainless steel strip |
-
1979
- 1979-04-09 JP JP4277879A patent/JPS55134177A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5147544A (en) * | 1974-10-22 | 1976-04-23 | Nippon Steel Corp | Sutenresukono chakushokuseigyoho |
| JPS5334636A (en) * | 1976-09-13 | 1978-03-31 | Nippon Kinzoku Co Ltd | Continuous pigmentation process for stainless steel strip |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55134177A (en) | 1980-10-18 |
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