JPH01279792A - Black steel sheet - Google Patents
Black steel sheetInfo
- Publication number
- JPH01279792A JPH01279792A JP11112488A JP11112488A JPH01279792A JP H01279792 A JPH01279792 A JP H01279792A JP 11112488 A JP11112488 A JP 11112488A JP 11112488 A JP11112488 A JP 11112488A JP H01279792 A JPH01279792 A JP H01279792A
- Authority
- JP
- Japan
- Prior art keywords
- black
- steel sheet
- layer
- phase
- resin
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 238000007747 plating Methods 0.000 claims abstract description 17
- 229910007567 Zn-Ni Inorganic materials 0.000 claims abstract description 13
- 229910007614 Zn—Ni Inorganic materials 0.000 claims abstract description 13
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000000956 alloy Substances 0.000 claims abstract description 6
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011651 chromium Substances 0.000 claims description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims 1
- 229920013716 polyethylene resin Polymers 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- -1 nitrate ions Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/567—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of platinum group metals
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- 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、家電、複写機、情報通信機、自動車部品、内
装建材等に利用される黒色鋼板に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a black steel sheet used for home appliances, copying machines, information communication devices, automobile parts, interior building materials, etc.
〈従来の技術〉
現在、表面を黒化処理した鋼板が家電、複写機、情報通
信機メーカー等でひろく利用されている。 この黒色鋼
板の製造法としては、（１）、黒色塗装法、（２）化学
処理法（特開昭５２−７６２３７、特開昭５２−７６２
３８．６Ｏ−１２１２７５）、（３）加熱処理法（特開
昭５５−９１９９３、特開昭５６−２９３）、（４）黒
色クロメート法等がある。<Conventional Technology> Currently, steel sheets with blackened surfaces are widely used by manufacturers of home appliances, copying machines, information communication equipment, and the like. The manufacturing methods for this black steel plate include (1) black coating method, (2) chemical treatment method (JP-A-52-76237, JP-A-52-762).
38.6O-121275), (3) heat treatment method (JP-A-55-91993, JP-A-56-293), and (4) black chromate method.
〈発明が解決しようとする課題〉
しかし、これら公知法による黒色鋼板は、スチールメー
カーの設備で製造する場合、下記のような問題点がある
。<Problems to be Solved by the Invention> However, when producing black steel plates by these known methods using the equipment of a steel manufacturer, there are the following problems.
（１）塗装設備の増設のために、コストが高くなる。(1) Costs will increase due to the addition of painting equipment.
（２）置換析出のため十分な皮膜強度かえられず、ライ
ン製造は難しい。(2) Due to displacement precipitation, sufficient film strength cannot be achieved, making line production difficult.
（３）均一な加熱コントロールが難しく、着色コントロ
ールが難しい。(3) It is difficult to control uniform heating, and it is difficult to control coloring.
（４）処理時間が長く、高速製造にはむかない。(4) Processing time is long, making it unsuitable for high-speed manufacturing.
そこで、近年、Ｚｎ系合金めっき鋼板を陽極酸化処理等
して黒色化した黒色鋼板（例えば特開昭６ｌ−１４３５
９４）が開発されている。Therefore, in recent years, black steel sheets (for example, Japanese Patent Application Laid-Open No. 6L-1435
94) has been developed.
しかしながら、家電メーカー等において、高い意匠性を
有する素材鋼板の需要が高まり、従来の黒色鋼板に比べ
て、さらに著しい黒色度を有する鋼板、具体的には黒色
度の指数でＬ値く１５を満たすものが求められるように
なってきた。However, demand for material steel sheets with high design quality is increasing among home appliance manufacturers, etc., and steel sheets with even more significant blackness than conventional black steel sheets, specifically, satisfy the L value of 15 on the blackness index. Things have come to be sought after.
く課題を解決するための手段〉
本発明者らは、上述した従来技術の問題点を解決すべく
鋭意研究した結果、スチールメーカーが所有する設備で
製造でき、かつ、黒色鋼板に要求される性能、すなわち
、黒色度、干渉色のない色調、均一外観に優れた鋼板と
して、黒色層の上層の相形態がγ相であることを特徴と
する黒色鋼板を開発した。Means for Solving the Problems〉 As a result of intensive research to solve the problems of the conventional technology described above, the present inventors have found a method that can be manufactured using equipment owned by steel manufacturers and that has the performance required for black steel sheets. That is, we have developed a black steel sheet characterized by the upper layer of the black layer having a γ phase as a steel sheet with excellent blackness, color tone free of interference colors, and uniform appearance.
すなわち、本発明の目的は、スチールメーカーが所有す
る設備で製造でき、黒色度、色調、均一外観に優れた黒
色鋼板を提供することにある。That is, an object of the present invention is to provide a black steel sheet that can be manufactured using equipment owned by a steel manufacturer and has excellent blackness, color tone, and uniform appearance.
本発明は、鋼板表面にＺｎ−Ｎｉ合金めっきの黒色層を
有する黒色鋼板において、前記Ｚｎ−Ｎｉ合金めっきは
平均組成で５〜２０ｗｔ％のＮｉを含有し、かつ、めっ
き層の上層の相形態がγ相である黒色層を有することを
特徴とする黒色鋼板を提供するものである。The present invention provides a black steel sheet having a black layer of Zn-Ni alloy plating on the surface of the steel sheet, wherein the Zn-Ni alloy plating contains 5 to 20 wt% Ni in average composition, and the phase morphology of the upper layer of the plating layer is The present invention provides a black steel sheet characterized by having a black layer having a γ phase.
この黒色鋼板において、黒色層を保護するために、黒色
層上にＣｒ換算で５〜１５０ｍ ｇ ／ ｍ ’のクロ
メート皮膜、あるいは、乾燥重量で０．３〜３．０ｇ／
ｍ’の樹脂およびケイ酸ゾルを主成分とする皮膜を形成
するのが好ましい。In this black steel sheet, in order to protect the black layer, a chromate film of 5 to 150 mg/m' in terms of Cr or 0.3 to 3.0 g/m' in dry weight is applied on the black layer.
It is preferable to form a film containing resin m' and silicic acid sol as main components.
また、黒色層上には、上記クロメート層を設けた上に、
樹脂−ケイ酸ゾル皮膜を設けてもよい。Furthermore, on top of the above chromate layer provided on the black layer,
A resin-silicate sol film may also be provided.
さらに、黒色層上には、乾燥重量で０．３〜３．０ｇ／
ｍ”の樹脂とクロムの混合皮膜を設けるのが好ましい。Furthermore, on the black layer, 0.3 to 3.0 g/dry weight is added.
It is preferable to provide a mixed coating of resin and chromium.
〈発明の具体的構成〉 以下、本発明について詳細に説明する。<Specific structure of the invention> The present invention will be explained in detail below.
本発明で対象となる素材は、Ｚｎ−Ｎｉめつき鋼板であ
る。 めっき法にはよらず、Ｎｉ含有率が５〜２０％、
付着量が７ｇ／ｍ２以上であればよい、 また、上記め
っき層の下層に各種めっき層があってもよい。 この範
囲であればＺｎ−Ｎｉめつき層の黒化に問題は生じない
。The material targeted by the present invention is a Zn-Ni plated steel plate. Regardless of the plating method, the Ni content is 5 to 20%,
It is sufficient that the adhesion amount is 7 g/m2 or more, and various plating layers may be provided below the above-mentioned plating layer. Within this range, there will be no problem with blackening of the Zn--Ni plated layer.
黒化法は、交番電解法、陽極酸化法などが好適に使用で
きる。As the blackening method, alternating electrolysis method, anodic oxidation method, etc. can be suitably used.
本発明の目的は、安定した黒色度、色調、均一外観を有
する鋼板を提供することである。An object of the present invention is to provide a steel sheet with stable blackness, color tone, and uniform appearance.
一般に、Ｚｎ−Ｎｉめつき鋼板のＺｎ−Ｎｉめっきの相
構造はＮｉの含有率によって異なることが知られている
。 そこで、本発明者らは、Ｎｉ含有率の異なるＺｎ−
Ｎｉめつき鋼板とそれらの黒化板に、アノード溶解を行
い、アノード溶解時のめつき層の電位からめっきの相形
態を調査した。 その結果、素材のＺｎ−Ｎｉめっき鋼
板のＺｎ−Ｎｉめっきがいかなる相形態であフても、黒
化後の相形態をγ相にすることにより、黒色度、色調、
均一性がすべて良好な黒色鋼板が得られることがわかっ
た。Generally, it is known that the phase structure of the Zn-Ni plating of a Zn-Ni plated steel sheet differs depending on the Ni content. Therefore, the present inventors investigated Zn-
Ni-plated steel sheets and their blackened plates were subjected to anodic melting, and the phase morphology of the plating was investigated from the potential of the plating layer during anode melting. As a result, no matter what phase form the Zn-Ni plating of the raw material Zn-Ni plated steel sheet has, the blackness, color tone,
It was found that a black steel plate with good uniformity could be obtained.
すなわち、本発明で対象となるＮｉ含有率＝５〜２０％
のＺｎ−Ｎｉめフき鋼板のＺｎ−Ｎｉめっきの相形態は
、γ相単相、または、γ相とより卑な相との複合相であ
るが、前者の場合には、黒化後もγ相を保持し、後者の
場合には、卑な相を溶解させγ相にすることによって、
上記の優れた黒色鋼板を製造できる。That is, the Ni content targeted by the present invention = 5 to 20%
The phase morphology of the Zn-Ni plating on the Zn-Ni-plated steel sheet is either a single γ phase or a composite phase of the γ phase and a more base phase, but in the former case, even after blackening, By retaining the γ phase and, in the latter case, dissolving the base phase to form the γ phase,
The above-mentioned excellent black steel plate can be manufactured.
その−例を第１図につき説明する。 Ｌ値が１３のも
のは第１図からγ単相であることがわかる。 Ｌ値が２
０および３４のものは斜線部で示すところがγ相より卑
な相となっている。 この部分を溶解させてやれば、γ
単相となって本発明の優れた黒色度の黒色鋼板が得られ
る。An example thereof will be explained with reference to FIG. It can be seen from FIG. 1 that the L value of 13 is γ single phase. L value is 2
In the case of Nos. 0 and 34, the shaded area is a phase less noble than the γ phase. If this part is dissolved, γ
It becomes a single phase, and the black steel sheet of the present invention with excellent blackness can be obtained.
以上の黒色鋼板は、そのままでも使用できるが耐食性を
上げるためにＺｎ−Ｎｉめっきの黒色層上にクロメート
皮膜を付着させるのがよい。 付着量は、Ｃｒ換算で、
５〜１５０ｍ ｇ ／ ｍ ’程度がよい。 ５ ｍ
ｇ ／ ｍ ’未満ではクロメート処理効果がなく、
耐食性が向上しない、 １５０ｍｇ／ｍ”を超える
と耐食性が飽和になるからである。The above black steel plate can be used as is, but in order to improve corrosion resistance, it is preferable to attach a chromate film on the black layer of Zn-Ni plating. The amount of adhesion is in terms of Cr,
Approximately 5 to 150 mg/m' is preferable. 5 m
Below g/m', there is no chromate treatment effect;
Corrosion resistance does not improve, and corrosion resistance becomes saturated when it exceeds 150 mg/m''.
また、黒色層の保護のために、カルボキシル化ポリエチ
レン樹脂、アクリル系樹脂、エポキシ系樹脂、ポリウレ
タン系樹脂、メラミン系樹脂などの樹脂、ケイ酸ゾル等
を塗布することもできる。 塗布量は、乾燥重量で０．
３〜３．０ｇ／ｍ２がよいｅ ０ 、３ ｇ ／ ｍ
”未満では効果がなく、３．０ｇ／ｍ２を超えると外
観には問題ないが、溶接性が低下するからである。Further, in order to protect the black layer, resin such as carboxylated polyethylene resin, acrylic resin, epoxy resin, polyurethane resin, melamine resin, silicic acid sol, etc. can be applied. The coating amount is 0.00% by dry weight.
3 to 3.0 g/m2 is good e 0 , 3 g/m
If it is less than 3.0 g/m2, there will be no effect, and if it exceeds 3.0 g/m2, there will be no problem with the appearance, but weldability will deteriorate.
上記範囲内で黒色層上に形成したクロメート皮膜の上層
に樹脂、シリカゾル層を重ねると、黒色の深みが増し、
かつ、耐食性も著しく向上させることができる。If a resin or silica sol layer is layered on top of the chromate film formed on the black layer within the above range, the depth of the black color will increase,
Moreover, corrosion resistance can also be significantly improved.
また、同じく上記範囲内でクロムと樹脂の混合タイプ液
で黒色層を処理しても同様な効果が得られる。Furthermore, similar effects can be obtained by treating the black layer with a mixed type liquid of chromium and resin within the above range.
〈実施例〉 以下に本発明を実施例につき具体的に説明する。<Example> The present invention will be specifically explained below using examples.
以下の条件で黒化処理し、試料の黒色度とアノード溶解
時の電位による相の同定結果との関係を調べた。The blackening treatment was performed under the following conditions, and the relationship between the blackness of the sample and the phase identification results based on the potential during anode dissolution was investigated.
浴組成 硫酸塩および硝酸イオンを含有する処理浴
電解条件 交番電解法
アノード溶解条件
電流密度 ２０ ｍＡ／ｃｍ２
黒色度（Ｌ値）は、黒さを増す指標として、スガ試験機
■製ＳＭカラーコンピューターを利用した。 Ｌ値は、
０から１００段階に分れ、一般にＬ値が高いものが白く
、低いものが黒い、 ここでは、目標り値を１５とした
。Bath composition Treatment bath containing sulfate and nitrate ions Electrolysis conditions Alternating electrolysis anode dissolution conditions Current density 20 mA/cm2 Blackness (L value) is an indicator of increasing blackness using an SM color computer manufactured by Suga Test Instruments ■. used. The L value is
Divided into 100 levels from 0, generally the higher the L value is white and the lower is black.Here, the target L value was set to 15.
第１図に素材とその黒化板のアノード溶解結果と黒色度
（Ｌ値）を示した。Figure 1 shows the anode dissolution results and blackness (L value) of the material and its blackened plate.
素材の相形態にはよらず、黒化後の相形態なγ相に黒化
処理したものは、すべて、Ｌ値が１５以下であることが
わかる。It can be seen that regardless of the phase form of the material, all the materials subjected to the blackening treatment to the γ phase, which is the phase form after blackening, have an L value of 15 or less.
〈発明の効果〉
本発明の黒色鋼板は、黒色層をγ相にすることによって
、黒色鋼板に要求される性能、すなわち、黒色度、色調
、均一外観に優れた鋼板を提供できる。<Effects of the Invention> By forming the black layer into the γ phase, the black steel sheet of the present invention can provide a steel sheet with excellent performance required for a black steel sheet, that is, excellent blackness, color tone, and uniform appearance.
第１図は、実施例で得られた試料のアノード溶解結果と
Ｌ値との関係を示すグラフである。FIG. 1 is a graph showing the relationship between the anodic dissolution results and the L value of the samples obtained in Examples.
Claims (5)
る黒色鋼板において、前記Ｚｎ−Ｎｉ合金めっきは平均
組成で５〜２０ｗｔ％のＮｉを含有し、かつ、めっき層
の上層の相形態がγ相である黒色層を有することを特徴
とする黒色鋼板。(1) In a black steel sheet having a black layer of Zn-Ni alloy plating on the surface of the steel sheet, the Zn-Ni alloy plating contains 5 to 20 wt% of Ni in average composition, and the phase morphology of the upper layer of the plating layer is A black steel sheet characterized by having a black layer that is a γ phase.
／ｍ＾２のクロメート皮膜を有することを特徴とする請
求項１に記載の黒色鋼板。(2) 5 to 150 mg in terms of Cr is added to the upper layer of the black layer.
The black steel sheet according to claim 1, having a chromate film of /m^2.
ｇ／ｍ＾２の樹脂およびケイ酸ゾルを主成分とする皮膜
を有することを特徴とする請求項１に記載の黒色鋼板。(3) Add 0.3 to 3.0 in dry weight to the upper layer of the black layer.
The black steel sheet according to claim 1, characterized in that it has a coating mainly composed of resin and silicic acid sol of g/m^2.
ト層と、その上層に請求項３に記載の皮膜を有すること
を特徴とする請求項１に記載の黒色鋼板。(4) The black steel sheet according to claim 1, further comprising the chromate layer according to claim 2 above the black layer and the coating according to claim 3 above the chromate layer.
ｇ／ｍ＾２の樹脂とクロムの混合皮膜を有することを特
徴とする請求項１に記載の黒色鋼板。(5) Add 0.3 to 3.0 in dry weight to the upper layer of the black layer.
The black steel sheet according to claim 1, characterized in that it has a mixed coating of resin and chromium of g/m^2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63111124A JP2577043B2 (en) | 1988-05-07 | 1988-05-07 | Black steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63111124A JP2577043B2 (en) | 1988-05-07 | 1988-05-07 | Black steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01279792A true JPH01279792A (en) | 1989-11-10 |
| JP2577043B2 JP2577043B2 (en) | 1997-01-29 |
Family
ID=14553045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63111124A Expired - Fee Related JP2577043B2 (en) | 1988-05-07 | 1988-05-07 | Black steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2577043B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1809790B1 (en) * | 2004-11-10 | 2016-04-27 | ATOTECH Deutschland GmbH | Process for improving the corrosion resistance of metal surfaces and metal pieces having improved corrsion resistance |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5348431B2 (en) * | 2009-10-28 | 2013-11-20 | Ｊｆｅスチール株式会社 | Hot press member |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61110798A (en) * | 1984-11-01 | 1986-05-29 | Sumitomo Metal Ind Ltd | Manufacture of steel sheet blackening treatment |
| JPS61143594A (en) * | 1984-12-14 | 1986-07-01 | Sumitomo Metal Ind Ltd | Manufacture of blackened steel sheet |
| JPS61227181A (en) * | 1985-03-30 | 1986-10-09 | Sumitomo Metal Ind Ltd | Highly corrosion resistant surface treated steel material |
| JPS6270583A (en) * | 1986-09-16 | 1987-04-01 | Nippon Steel Corp | Production of black zinc alloy plated steel sheet |
-
1988
- 1988-05-07 JP JP63111124A patent/JP2577043B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61110798A (en) * | 1984-11-01 | 1986-05-29 | Sumitomo Metal Ind Ltd | Manufacture of steel sheet blackening treatment |
| JPS61143594A (en) * | 1984-12-14 | 1986-07-01 | Sumitomo Metal Ind Ltd | Manufacture of blackened steel sheet |
| JPS61227181A (en) * | 1985-03-30 | 1986-10-09 | Sumitomo Metal Ind Ltd | Highly corrosion resistant surface treated steel material |
| JPS6270583A (en) * | 1986-09-16 | 1987-04-01 | Nippon Steel Corp | Production of black zinc alloy plated steel sheet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1809790B1 (en) * | 2004-11-10 | 2016-04-27 | ATOTECH Deutschland GmbH | Process for improving the corrosion resistance of metal surfaces and metal pieces having improved corrsion resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2577043B2 (en) | 1997-01-29 |
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