JPH03100183A - Surface-treated steel sheet having superior corrosion resistance, coatability and corrosion resistance after coating - Google Patents
Surface-treated steel sheet having superior corrosion resistance, coatability and corrosion resistance after coatingInfo
- Publication number
- JPH03100183A JPH03100183A JP23851089A JP23851089A JPH03100183A JP H03100183 A JPH03100183 A JP H03100183A JP 23851089 A JP23851089 A JP 23851089A JP 23851089 A JP23851089 A JP 23851089A JP H03100183 A JPH03100183 A JP H03100183A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion resistance
- steel sheet
- treated steel
- plating layer
- hydrophilic polymer
- 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
- 238000005260 corrosion Methods 0.000 title claims abstract description 38
- 230000007797 corrosion Effects 0.000 title claims abstract description 38
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 239000011248 coating agent Substances 0.000 title abstract description 19
- 238000000576 coating method Methods 0.000 title abstract description 19
- 238000007747 plating Methods 0.000 claims abstract description 25
- 229920001477 hydrophilic polymer Polymers 0.000 claims abstract description 23
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 125000000524 functional group Chemical group 0.000 claims abstract description 5
- 238000010422 painting Methods 0.000 claims description 22
- 125000003368 amide group Chemical group 0.000 abstract description 3
- 125000003700 epoxy group Chemical group 0.000 abstract description 2
- 125000000542 sulfonic acid group Chemical group 0.000 abstract description 2
- 239000004593 Epoxy Chemical group 0.000 abstract 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 description 11
- 238000011282 treatment Methods 0.000 description 11
- 239000002023 wood Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 2
- 238000006757 chemical reactions by type Methods 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000010828 elution Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 241001163841 Albugo ipomoeae-panduratae Species 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical group OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004083 survival effect 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
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
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)
- Electroplating Methods And Accessories (AREA)
- Chemical Treatment Of Metals (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は表面処理鋼板に関し、詳細には自動車、家庭用
電気製品及び建材等に使用される耐食性、塗装性及び塗
装後耐食性に優れた表面処理鋼板に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to surface-treated steel sheets, and in particular, surfaces with excellent corrosion resistance, paintability, and post-painting corrosion resistance used in automobiles, household electrical appliances, building materials, etc. This relates to treated steel sheets.
［従来の技術］
Ｚｎ系めっき鋼板はその優れた耐食性が評価され、自動
車等の各種車輛、家電製品、建材等の素材として汎用さ
れている。また近年の耐食性向上志向を受けて、反応型
、塗装型等の種々のクロメート処理技術が開発され、上
記Ｚｎ系めっき鋼板の表面にクロメート皮膜を形成した
クロメート処理鋼板が実用化されている。しかしこれら
のクロメート処理鋼板は塗装用鋼板としての要求品質を
総合的に満足させるものではなく、例えば耐食性が良好
なものは塗装性が十分でなく、逆に塗装性に優れるもの
は耐食性に劣るという欠点を有していた。その為現状で
はＺｎ系めっき鋼板に耐食性の良好なりロメート皮膜を
形成した上で、塗装前にリン酸塩処理等を行なうことに
よって塗装性および塗装後耐食性の向上を図っている。[Prior Art] Zn-based plated steel sheets have been praised for their excellent corrosion resistance and are widely used as materials for various vehicles such as automobiles, home appliances, building materials, and the like. In addition, in response to the recent desire to improve corrosion resistance, various chromate treatment techniques such as reaction type and painting type have been developed, and chromate treated steel sheets in which a chromate film is formed on the surface of the above-mentioned Zn-based plated steel sheets have been put into practical use. However, these chromate-treated steel sheets do not comprehensively satisfy the quality requirements for steel sheets for painting; for example, those with good corrosion resistance do not have sufficient paintability, and conversely, those with excellent paintability have poor corrosion resistance. It had drawbacks. Therefore, at present, after forming a romate film with good corrosion resistance on a Zn-based plated steel sheet, the coating is treated with a phosphate or the like before painting in order to improve the paintability and the corrosion resistance after painting.
しかしリン酸塩処理等の塗装前処理は生産工程を複雑に
し、年々高まる生産性向上要求に逆行するものであるか
ら、該塗装前処理に代わる技術の開発が要望されている
。However, pre-painting treatments such as phosphate treatment complicate the production process and go against the ever-increasing demand for improved productivity, so there is a demand for the development of a technology that can replace the pre-painting treatments.
［発明が解決しようとする課題］
本発明はこのような事情に着目してなされたものであっ
てリン酸塩処理等の塗装前処理を行なうことなく耐食性
、塗装性及び塗装後耐食性に優れた表面処理鋼板を提供
することを目的とするものである。[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned circumstances, and provides a method for achieving excellent corrosion resistance, paintability, and post-painting corrosion resistance without performing pre-painting treatments such as phosphate treatment. The purpose is to provide a surface-treated steel sheet.
［課題を解決するための手段］
上記課題を解決した本発明の表面処理鋼板とは、Ｚｎ系
めっき上にクロメート皮膜を有する表面処理鋼板におい
て、１分子当りｌｏＸＩＯｌ％以上が親水性の官能基で
ある親水性ポリマーを、Ｚｎ系めっき層にＣ換算で０．
１〜５ｗｔ％含有させていることを要旨とするものであ
る。[Means for Solving the Problems] The surface-treated steel sheet of the present invention that has solved the above problems is a surface-treated steel sheet having a chromate film on Zn-based plating, in which loXIOl% or more per molecule is a hydrophilic functional group. A certain hydrophilic polymer is added to the Zn-based plating layer at a concentration of 0.0% in terms of C.
The gist is that the content is 1 to 5 wt%.
［作用］
かねてより本発明者らはＺｎ系めフき層と塗膜との密着
性を向上させるという観点から種々検討を行なっており
、めっき層表面側に極性基を存在させればめっき層表面
と塗膜との親和性が高まり、塗装前処理なしでも優れた
塗膜密着性が得られることを見出している。特にＺｎ系
めっき層中に、Ｎ−メチロールアクリルアミド単位を有
するアクリルアミド系ポリマーを含有させることによっ
て塗膜密着性の格段に優れたＺｎ系めっき鋼板を開発し
、先に特許出願を済ませた（特願昭６３−２５８１１５
号：未公開）。[Function] The present inventors have been conducting various studies from the viewpoint of improving the adhesion between the Zn-based plating layer and the coating film, and found that if a polar group is present on the surface side of the plating layer, the plating layer It has been found that the affinity between the surface and the paint film is increased, and excellent paint film adhesion can be obtained without any pre-painting treatment. In particular, by incorporating an acrylamide polymer having N-methylol acrylamide units into the Zn-based plating layer, we have developed a Zn-based plated steel sheet with significantly superior coating adhesion, and have previously filed a patent application (patent application). Showa 63-258115
Issue: unpublished).
そしてその後の研究の結果、上記アミド系ポリマーのみ
ならず親水性の官能基（以下親木基という）を一定量以
上含有する親水性ポリマーであれば、該親木基が塗装成
分の官能基と結合することによって優れた塗膜密着性が
得られることを見い出した。As a result of subsequent research, it was found that in addition to the above-mentioned amide-based polymer, if the hydrophilic polymer contains a certain amount or more of a hydrophilic functional group (hereinafter referred to as a parent group), the parent group is the functional group of the coating component. It has been found that excellent coating film adhesion can be obtained by bonding.
またこの様な効果は、上記ポリマーを含有したＺｎ系め
っき材料上にクロメート皮膜を形成することによっても
変わらず、さらにはクロメート皮膜の性能を十分に発揮
させる上で必要な皮膜中のＨ２Ｏを保持する効果やクロ
メート皮膜の溶出を抑制する効果も前記の親木性ポリマ
ーに基づくものであるとの知見を得て、本発明を開発す
るに至った。In addition, this effect remains even when a chromate film is formed on a Zn-based plating material containing the above-mentioned polymer, and furthermore, it retains H2O in the film, which is necessary for the chromate film to fully demonstrate its performance. The present invention was developed based on the knowledge that the effect of suppressing the elution of the chromate film and the effect of suppressing the elution of the chromate film are also based on the above-mentioned wood-philic polymer.
尚本発明に適用できるポリマーはめっき液中での安定性
や十分な塗膜密着性を得るためにも親水性ポリマーであ
ることが必須であるが、特にその種類によって限定され
るものではなく、炭素−炭素結合あるいは炭素−炭素結
合の二重結合を主鎖とし、側鎖が親木基であるかもしく
は一部に親木基を有するものであればよい。親木基とし
ては、アミノ基、アミド基、エポキシ基、スルホン酸基
、水酸基、カルボキシル基、リン酸基等が挙げられる。The polymer applicable to the present invention must be a hydrophilic polymer in order to obtain stability in the plating solution and sufficient coating film adhesion, but is not particularly limited by its type. The main chain may be a carbon-carbon bond or a carbon-carbon double bond, and the side chain may be a parent wood group or partially have a parent wood group. Examples of the parent group include an amino group, an amide group, an epoxy group, a sulfonic acid group, a hydroxyl group, a carboxyl group, a phosphoric acid group, and the like.
但し親水性ポリマーが塗膜密着性を十分発揮するために
は、親木基をポリマーの１分子当りに１０ｉｏ１％以上
含有していることが必要である。However, in order for the hydrophilic polymer to exhibit sufficient coating film adhesion, it is necessary that the parent wood group be contained in an amount of 10io1% or more per molecule of the polymer.
まためっき層のポリマー含有量が０．１＋ｙｔ％未満で
は十分な塗膜密着性が得られず、□５ｗｔ％を超えると
耐食性の劣化をひきおこすので、Ｃ量換算で０．１〜５
ｗｔ％とする必要がある。Furthermore, if the polymer content of the plating layer is less than 0.1+yt%, sufficient coating film adhesion cannot be obtained, and if it exceeds □5wt%, corrosion resistance will deteriorate.
It is necessary to set it as wt%.
親水性ポリマーを含有させるめっき層としてはＺｎ系め
っきであれば良く、純Ｚｎめっきの他にも例えばＮｉ、
Ｆｅ、Ｃｏ、Ｃｒ、Ｍｇ、Ｍｎ等を添加したＺｎ合金め
っきが適用できる。さらにはポリマー含有めっきの下層
に上記Ｚｎ合金めっきを施した多層めっきであっても同
等の効果が得られる。The plating layer containing the hydrophilic polymer may be Zn-based plating, and in addition to pure Zn plating, for example, Ni,
Zn alloy plating to which Fe, Co, Cr, Mg, Mn, etc. are added can be applied. Furthermore, the same effect can be obtained even with multilayer plating in which the Zn alloy plating is applied to the lower layer of the polymer-containing plating.
次にクロメート皮膜について言及すると本発明はクロメ
ート処理の方法を限定するものではなく、塗布型、反応
型、電解型などのいずれであってもよい。但し、耐食性
を向上させる上で、クロメート皮膜中の六価Ｃｒ量は全
クロム量に対して１０％以上とすることが望ましい、ク
ロメート皮膜の膜厚は特に限定されないが耐食性向上の
観点からも親水性ポリマーの機能を発揮させるという観
点からも２０ Ａ （４ｍｇ／ｍ” ）以上が望ましく
、塗装性も重視する場合には上限が１ｏｏｏＡ（２００
ｏ＋ｇ／ａ” ）であることが好ましい。Next, referring to the chromate film, the present invention does not limit the method of chromate treatment, and any of the coating type, reaction type, electrolytic type, etc. may be used. However, in order to improve corrosion resistance, it is desirable that the amount of hexavalent Cr in the chromate film is 10% or more based on the total amount of chromium.The thickness of the chromate film is not particularly limited, but from the viewpoint of improving corrosion resistance, it is desirable to make it hydrophilic. 20 A (4 mg/m") or more is desirable from the viewpoint of demonstrating the function of the polymer, and if paintability is also important, the upper limit is 100 A (200 A).
o+g/a'') is preferable.
［実施例］
脱脂、酸洗した冷延鋼板に、親水性ポリマーを含有する
種々のＺｎ系めっき液を用いて電気めっきを行った後、
その上にクロメート皮膜をＣｒ付着量で５０ ｍｇ／ｍ
２となる様に塗布し、試験片を得た。[Example] After electroplating a degreased and pickled cold-rolled steel sheet using various Zn-based plating solutions containing hydrophilic polymers,
On top of that, apply a chromate film with a Cr coating amount of 50 mg/m
2, and a test piece was obtained.
親水性ポリマー１分子当りの親木基量及び親木性ポリマ
ー含有量の異なる上記試験片について、以下の方法で耐
食性、塗装性及び塗装後耐食性を評価した。Corrosion resistance, paintability, and post-painting corrosion resistance were evaluated using the following methods for the above test pieces having different amounts of woody groups and woody polymer contents per molecule of hydrophilic polymer.
耐食性：塩水噴霧試験による白錆発生時間Ｑ：１００時
間以上
Δ：５０時間以上１００時間未満
Ｘ：５０時間未満
塗装性：環水試験１時間後基盤目テープ剥離試験
Ｏ：剥離なし
×：剥離あり
塗装後耐食性：クロスカット塩水噴露試験２４時間後テ
ープ剥離による塗膜剥離幅
Ｑ：１ｍｍ未満
６８１１１１１１以上２１未満
Ｘ：２ｍｍ以上
評価結果は第１表に示す。Corrosion resistance: White rust generation time by salt spray test Q: 100 hours or more Δ: 50 hours or more and less than 100 hours Corrosion resistance after painting: Cross-cut salt water spray test 24 hours later, tape peeling width Q: less than 1 mm 68111111 or more and less than 21 X: 2 mm or more The evaluation results are shown in Table 1.
第１表により次の様に考えることができる。Based on Table 1, it can be considered as follows.
実験Ｎｏ、１〜８は本発明の規定要件を満足する実施例
であり、親木性ポリマー１分子当りの親木基量及び親木
性ポリマー含有量が適正である。その為耐食性、塗装性
及び塗装後耐食性を総合的に満足させる表面処理鋼板が
得られている。Experiment Nos. 1 to 8 are examples that satisfy the specified requirements of the present invention, and the amount of woody groups and woody polymer content per molecule of woody polymer are appropriate. Therefore, a surface-treated steel sheet is obtained that comprehensively satisfies corrosion resistance, paintability, and post-painting corrosion resistance.
これに対し実験Ｎｏ、９〜１３は以下に述べる様に本発
明で定める要件のいずれかを欠く比較例であり、耐食性
、塗装性及び塗装後耐食性のいずれかが不十分である
Ｎｏ、 ９は親水性ポリマー１分子当りの親木基量が少
ない場合の比較例であり、塗装性が悪く塗装後耐食性も
不十分である。 Ｎｏ、 １０はクロメート処理を施し
ていない場合の比較例であり、耐食性が劣悪で塗装後耐
食性も悪い、 Ｎｏ、 １１は親水性ポリマー含有量が
多過ぎる場合の比較例であり、塗装性が悪く塗装後耐食
性も不十分である。Ｎｏ。On the other hand, Experiment Nos. 9 to 13 are comparative examples that lack any of the requirements specified by the present invention, as described below, and No. 9 is insufficient in either corrosion resistance, paintability, or post-painting corrosion resistance. This is a comparative example in which the amount of parent wood groups per molecule of the hydrophilic polymer is small, and the paintability is poor and the corrosion resistance after painting is also insufficient. No. 10 is a comparative example without chromate treatment, and has poor corrosion resistance and poor corrosion resistance after painting. No. 11 is a comparative example with too much hydrophilic polymer content, and has poor paintability. Corrosion resistance after painting is also insufficient. No.
１２は親水性ポリマーを含有していない場合の比較例で
あり、塗装後耐食性が劣悪であり、塗装性も悪く、また
耐食性も不十分である。Ｎｏ、１３は親水性ポリマー１
分子当りの親木基量が少なく且つ親水性ポリマー含有量
が多過ぎる場合の比較例であり、塗装性が悪く塗装後耐
食性も低い。No. 12 is a comparative example in which no hydrophilic polymer is contained, and the corrosion resistance after painting is poor, the paintability is also poor, and the corrosion resistance is also insufficient. No. 13 is hydrophilic polymer 1
This is a comparative example in which the amount of parent wood group per molecule is small and the content of hydrophilic polymer is too large, and the paintability is poor and the corrosion resistance after painting is also low.
次にＺｎめフき液を用いて親水性ポリマー含有量を２ｗ
ｔ％にしたまま、親水性ポリマー１分子当りの親木基量
を順次変更して該親木基量の異なる試験片を得、塗膜残
存率を測定した。結果は第１図に示す、この図からも明
らかである様に、十分な塗膜密着性を発揮する為には、
１分子当り１０ｉｘｏ１％以上の親木基が必要であるこ
とがわかる。Next, the hydrophilic polymer content was reduced to 2w using Zn cleaning solution.
The amount of parent wood groups per molecule of the hydrophilic polymer was sequentially changed while keeping the amount of parent wood groups at t% to obtain test pieces having different amounts of parent wood groups, and the coating film survival rate was measured. The results are shown in Figure 1.As is clear from this figure, in order to exhibit sufficient paint film adhesion,
It can be seen that 10ixo1% or more of parent wood groups are required per molecule.
さらにＺｎめっき液と１分子当りのアミド基が４０＋＋
＋ｏ１％である親水性ポリマーとを用いて親水性ポリマ
ー含有量の異なる試験片を得、塗膜残存率を測定した。Furthermore, Zn plating solution and amide group per molecule are 40++
+o1% of the hydrophilic polymer was used to obtain test pieces with different hydrophilic polymer contents, and the coating film residual rate was measured.
結果は第２図に示す。この図から親水性ポリマー含有Ｚ
ｎめっき材料に優れた塗膜密着性を持たせるには、めっ
き層中の親水性ポリマー含有率をＣ換算で０．１ｗｔ％
以上５ｗｔ％以下にすべきことがわかる。The results are shown in Figure 2. From this figure, hydrophilic polymer-containing Z
In order to provide excellent coating film adhesion to n-plated materials, the hydrophilic polymer content in the plating layer should be 0.1 wt% in terms of C.
It can be seen that the content should be 5 wt% or less.
［発明の効果］
本発明は以上の様に構成されているので、リン酸塩処理
等の塗装前処理を行なうことなく、耐食性、塗装性、塗
装後耐食性に優れた表面処理鋼板を提供できることとな
った。[Effects of the Invention] Since the present invention is configured as described above, it is possible to provide a surface-treated steel sheet with excellent corrosion resistance, paintability, and post-painting corrosion resistance without performing pre-painting treatment such as phosphate treatment. became.
第１図は親水性ポリマー中の親木基量と塗装性の関係を
表わすグラフ、第２図はめフき層中の親水性ポリマー含
有量と塗装性との関係を表わすグラフである。
第１図FIG. 1 is a graph showing the relationship between the amount of parent wood groups in the hydrophilic polymer and paintability, and FIG. 2 is a graph showing the relationship between the content of the hydrophilic polymer in the peeling layer and paintability. Figure 1
Claims (1)
板において、１分子当り１０ｍｏｌ％以上が親水性の官
能基である親水性ポリマーを、Ｚｎ系めっき層にＣ換算
で０．１〜５ｗｔ％含有させてなることを特徴とする耐
食性、塗装性及び塗装後耐食性に優れた表面処理鋼板。In a surface-treated steel sheet having a chromate film on Zn-based plating, the Zn-based plating layer contains 0.1 to 5 wt% in terms of C of a hydrophilic polymer in which 10 mol% or more per molecule is a hydrophilic functional group. A surface-treated steel sheet with excellent corrosion resistance, paintability, and post-painting corrosion resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23851089A JPH03100183A (en) | 1989-09-13 | 1989-09-13 | Surface-treated steel sheet having superior corrosion resistance, coatability and corrosion resistance after coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23851089A JPH03100183A (en) | 1989-09-13 | 1989-09-13 | Surface-treated steel sheet having superior corrosion resistance, coatability and corrosion resistance after coating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03100183A true JPH03100183A (en) | 1991-04-25 |
Family
ID=17031323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23851089A Pending JPH03100183A (en) | 1989-09-13 | 1989-09-13 | Surface-treated steel sheet having superior corrosion resistance, coatability and corrosion resistance after coating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03100183A (en) |
-
1989
- 1989-09-13 JP JP23851089A patent/JPH03100183A/en active Pending
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