JPS63109188A - Production of blackened steel sheet - Google Patents
Production of blackened steel sheetInfo
- Publication number
- JPS63109188A JPS63109188A JP25374386A JP25374386A JPS63109188A JP S63109188 A JPS63109188 A JP S63109188A JP 25374386 A JP25374386 A JP 25374386A JP 25374386 A JP25374386 A JP 25374386A JP S63109188 A JPS63109188 A JP S63109188A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- blackened
- treatment
- bath
- ions
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 37
- 239000010959 steel Substances 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 150000002500 ions Chemical class 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 8
- 238000007747 plating Methods 0.000 abstract description 14
- 229910007567 Zn-Ni Inorganic materials 0.000 abstract description 7
- 229910007614 Zn—Ni Inorganic materials 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 7
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、黒色化処理鋼板の製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a blackened steel sheet.
めっきにより黒色化処理鋼板を製造する方法の従来技術
として特開昭６１−１１０７９８号公報が開示されてい
る。JP-A-61-110798 discloses a prior art method for producing blackened steel sheets by plating.
従来技術においては以下に述べるような問題がある。す
なわち、
（１）黒色化可能鋼板を、Ｎｔ≧５％含むＺｎ系合金め
っき層を有する鋼板に限定している。The conventional technology has the following problems. That is, (1) The steel sheet that can be blackened is limited to a steel sheet that has a Zn-based alloy plating layer containing Nt≧5%.
（２）製造工程が、めっき工程と黒色化工程の２工程と
なっている。(2) The manufacturing process consists of two steps: a plating process and a blackening process.
（３）めっき工程では電気量ｌＯ〜６００クーロン／
ｄ ｍ’の陽極処理をしているのでその専用設備が必要
となる。(3) In the plating process, the amount of electricity is 1O ~ 600 coulombs/
Since dm' is anodized, special equipment is required.
（４）黒色化工程では処理液が、ＮＯ３−イオン等を含
むものであり、別途専用処理液を必要とすると共に、管
理ファクターも多く、品質のばらつきも多い。(4) In the blackening process, the treatment liquid contains NO3- ions, etc., and a separate dedicated treatment liquid is required, there are many management factors, and there are many variations in quality.
本発明は上述の問題点を解決することを目的とし、既存
の陰極処理設備が使用でき、黒色可能鋼板を特定の鋼板
に限定することなく、かつ、品質の良好な黒色化処理鋼
板の製造方法を提供するものである。The present invention aims to solve the above-mentioned problems, and is a method for producing a blackened steel sheet of good quality, which allows use of existing cathode treatment equipment, does not limit the steel sheet that can be blackened to a specific steel sheet. It provides:
本発明は上述の問題点を解決そるもので次の技術Ｙ段を
採った。すなわち、
Ｚｎ及びＮｉイオンを含みｐＨが５．３〜５．８ （７
）浴中で４鋼板表面を電流密度０．５〜５Ａ／ｄｍ′で
陰極処理する。The present invention is intended to solve the above-mentioned problems, and employs the following technology stage Y. That is, it contains Zn and Ni ions and has a pH of 5.3 to 5.8 (7
) The surfaces of the four steel plates are cathodically treated in a bath at a current density of 0.5 to 5 A/dm'.
未発明の骨子は、鋼板表面に、ＺｎおよびＮｉイオンを
含む浴中で低電流密度の陰極処置を施して黒色化層を表
面に形成する点にある。The key point of the invention is that the surface of the steel plate is subjected to cathodic treatment at a low current density in a bath containing Zn and Ni ions to form a blackening layer on the surface.
本発明で黒色化処理を施される処理材は冷延鋼板でも、
Ｚｎめっき鋼板、Ｚｎ−Ｎｉめっき鋼板でもよく、特に
限定しないが、処理される鋼板の種類によって、その製
造順序はかわる０例えば、（１）冷延鋼板を黒くする場
合。The treated material that is subjected to blackening treatment in the present invention may be a cold-rolled steel plate,
A Zn-plated steel sheet or a Zn-Ni-plated steel sheet may be used. Although not particularly limited, the manufacturing order changes depending on the type of steel sheet to be processed. For example, (1) When a cold-rolled steel sheet is blackened.
ＺｎおよびＮｉを含む浴中で、陰極処理する。Cathodic treatment is carried out in a bath containing Zn and Ni.
（２）Ｚｎめっき鋼板を黒くする場合。(2) When making Zn-plated steel plate black.
Ｚｎめっき浴中でＺｎめっきした後、ＺｎおよびＮｉを
含む浴中で、陰極処理する。After Zn plating in a Zn plating bath, cathode treatment is performed in a bath containing Zn and Ni.
（３）Ｚｎ−Ｎｉ合金めっき鋼板を黒くする場合。(3) When making Zn-Ni alloy plated steel sheet black.
Ｚｎ−Ｎｉめっき浴中でＺｎ−Ｎｉめっきした後、Ｚｎ
およびＮｉを含む浴中で、陰極処理する。After Zn-Ni plating in a Zn-Ni plating bath, Zn
and cathodic treatment in a bath containing Ni.
等の処理を施せばよい。What is necessary is to perform processing such as the following.
以下本発明をさらに具体的に説明する。黒色化するため
に用いる処理液は、Ｎｉイオンを５０ ｇ ／ １以上
含む、通常［７）Ｚｎ−Ｎｉ合金めっきに用いている液
が望ましく、この濃度以下であると、通常の合金めっき
に使用できなくなるため、別途貯蔵する等の手段をとる
必要が゛あり、経済的でない。The present invention will be explained in more detail below. The treatment solution used for blackening is preferably a solution that contains Ni ions of 50 g/1 or more and is normally used for [7] Zn-Ni alloy plating, and if the concentration is below this concentration, it cannot be used for normal alloy plating. Therefore, it is necessary to take measures such as storing it separately, which is not economical.
この処理液のｐＨは５．３未満または５．８を越えると
、黒色度が低下するので５．３〜５．８とする。If the pH of this treatment liquid is less than 5.3 or more than 5.8, the degree of blackness will decrease, so the pH is set at 5.3 to 5.8.
また、電流密度については、０．５〜５Ａ／ｄｒｎ’が
望ましく、０．５Ａ未満では処理時間が長くなるため製
造能率が低下して実用的でなく、また、５Ａ／ｄｒｎ’
を越えると黒色度が低下する。In addition, the current density is preferably 0.5 to 5 A/drn'; if it is less than 0.5 A, the processing time becomes longer and manufacturing efficiency decreases, making it impractical;
If it exceeds this, the degree of blackness will decrease.
処理温度は５０〜６０℃が望ましく、処置時間は目的の
黒色層の厚さによる。The treatment temperature is preferably 50 to 60°C, and the treatment time depends on the desired thickness of the black layer.
以上の処理により容易に黒色鋼板を得゛ることができる
。A black steel plate can be easily obtained by the above treatment.
浴組成が、
Ｎ ｉ Ｓ Ｏ４・６Ｈ２０・・・３００ ｇ／立Ｚｎ
ＳＯ４１１７Ｈ２０・・１７０ｇ／ｌＮａ２ ＳＯ４−
３０ｇ／ｌ
を含む溶液でｐＨを１．８〜６．０に調整した処理液を
用い、′上流密度１〜５．５Ａ／ｄｒｒｒ’で第１図に
示すようにＺｎ−Ｎｉ合金めっき鋼板に陰極処理を施し
た。The bath composition is NiSO4・6H20...300 g/vertical Zn
SO4117H20...170g/lNa2 SO4-
Using a treatment solution whose pH was adjusted to 1.8 to 6.0 with a solution containing 30 g/l, a Zn-Ni alloy plated steel sheet was coated at an upstream density of 1 to 5.5 A/drrr as shown in Figure 1. Cathode treatment was applied.
第１図は、被黒色化処理鋼板（Ｚｎ−Ｎｉ合金めっき鋼
板）１を処理浴３中で陰極処理して黒色化処理する黒色
化処理鋼板の製造方法の説明図であり、その結果を第１
表に示した。FIG. 1 is an explanatory diagram of a method for manufacturing a blackened steel sheet in which a steel sheet to be blackened (Zn-Ni alloy plated steel sheet) 1 is subjected to cathodic treatment in a treatment bath 3 for blackening treatment. 1
Shown in the table.
本発明の処理方法で処理した鋼板すなわち、処理液中の
Ｎｉイオンが５０ ｇ ／ １以上でｐＨが５．３〜５
．８の浴中で、電流密度が０．５〜５Ａ／ｄｒｎ’の場
合には優または良の黒色化鋼板が得られることが分った
。上記範囲を外れた比較例ではいずれも不良の黒色化鋼
板しか得られなかった。Steel plate treated by the treatment method of the present invention, that is, Ni ions in the treatment solution are 50 g / 1 or more and the pH is 5.3 to 5.
．． It was found that excellent or good blackened steel sheets could be obtained in bath No. 8 when the current density was 0.5 to 5 A/drn'. In all comparative examples outside the above range, only defective blackened steel sheets were obtained.
また耐食性をさらに付加するため、この黒色層トにクロ
メート皮膜を施すことも可能である。It is also possible to apply a chromate coating to this black layer to further add corrosion resistance.
本発明によれば特定の陽極処理設備なしで、既存の陰極
処理設備で、処理液のＰＨおよび電流密度や処理時間を
コントロールして黒色化処理鋼板を容易に得ることがで
きるので、次のような優れた効果を奏する。According to the present invention, a blackened steel sheet can be easily obtained by controlling the pH of the treatment solution, current density, and treatment time using existing cathode treatment equipment without the need for specific anodic treatment equipment. It has excellent effects.
（ａ）新たに陽極設備の投資が不要である。(a) There is no need to invest in new anode equipment.
（ｂ）めっき→黒色化処理の過程で同−液を使用するこ
とが出来るのでめっき液の管理も容易で品質も安定する
。(b) Since the same solution can be used in the process of plating and blackening, the plating solution can be easily managed and its quality is stable.
（ｃ）黒色可能鋼板を特定の鋼板に限定することなく、
範囲も広く、用途にあった黒色化鋼板が得られる。(c) Without limiting the steel plate that can be blackened to a specific steel plate,
The range is wide, and blackened steel sheets suitable for various uses can be obtained.
第１図は本発明の製造方法を示す説明図である。 ｌ・・・被黒色化処理鋼板 ２・・・黒色めっき層 ３・・・処理浴 ４・・・陽極 FIG. 1 is an explanatory diagram showing the manufacturing method of the present invention. l... Steel plate to be blackened 2...Black plating layer 3... Processing bath 4...Anode
Claims (1)
浴中で、鋼板表面を電流密度０．５〜５Ａ／ｄｍ＾２で
陰極処理することを特徴とする黒色化処理鋼板の製造方
法。1. Production of a blackened steel sheet characterized by cathodically treating the surface of the steel sheet at a current density of 0.5 to 5 A/dm^2 in a bath containing Zn and Ni ions and having a pH of 5.3 to 5.8. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25374386A JPS63109188A (en) | 1986-10-27 | 1986-10-27 | Production of blackened steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25374386A JPS63109188A (en) | 1986-10-27 | 1986-10-27 | Production of blackened steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63109188A true JPS63109188A (en) | 1988-05-13 |
Family
ID=17255520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25374386A Pending JPS63109188A (en) | 1986-10-27 | 1986-10-27 | Production of blackened steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63109188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007319300A (en) * | 2006-05-31 | 2007-12-13 | Aruze Corp | Game machine |
-
1986
- 1986-10-27 JP JP25374386A patent/JPS63109188A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007319300A (en) * | 2006-05-31 | 2007-12-13 | Aruze Corp | Game machine |
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