JPH04191392A - Surface-treated steel sheet having superior corrosion resistance - Google Patents
Surface-treated steel sheet having superior corrosion resistanceInfo
- Publication number
- JPH04191392A JPH04191392A JP32378090A JP32378090A JPH04191392A JP H04191392 A JPH04191392 A JP H04191392A JP 32378090 A JP32378090 A JP 32378090A JP 32378090 A JP32378090 A JP 32378090A JP H04191392 A JPH04191392 A JP H04191392A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- corrosion resistance
- plating
- alloy
- plating layer
- 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 38
- 239000010959 steel Substances 0.000 title claims abstract description 38
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 238000005260 corrosion Methods 0.000 title claims abstract description 20
- 238000007747 plating Methods 0.000 claims abstract description 42
- 150000003839 salts Chemical class 0.000 claims abstract description 13
- 238000009713 electroplating Methods 0.000 claims abstract description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 9
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 9
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 9
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 9
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 229910000756 V alloy Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 229910018131 Al-Mn Inorganic materials 0.000 description 2
- 229910018461 Al—Mn Inorganic materials 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- 229910001257 Nb alloy Inorganic materials 0.000 description 2
- 229910001362 Ta alloys Inorganic materials 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- WIDQNNDDTXUPAN-UHFFFAOYSA-I tungsten(v) chloride Chemical compound Cl[W](Cl)(Cl)(Cl)Cl WIDQNNDDTXUPAN-UHFFFAOYSA-I 0.000 description 2
- LLQHSBBZNDXTIV-UHFFFAOYSA-N 6-[5-[[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]methyl]-4,5-dihydro-1,2-oxazol-3-yl]-3H-1,3-benzoxazol-2-one Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)CC1CC(=NO1)C1=CC2=C(NC(O2)=O)C=C1 LLQHSBBZNDXTIV-UHFFFAOYSA-N 0.000 description 1
- 229910018084 Al-Fe Inorganic materials 0.000 description 1
- 229910018192 Al—Fe Inorganic materials 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910015221 MoCl5 Inorganic materials 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 101100323029 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) alc-1 gene Proteins 0.000 description 1
- 229910021553 Vanadium(V) chloride Inorganic materials 0.000 description 1
- 229910000946 Y alloy Inorganic materials 0.000 description 1
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- GICWIDZXWJGTCI-UHFFFAOYSA-I molybdenum pentachloride Chemical compound Cl[Mo](Cl)(Cl)(Cl)Cl GICWIDZXWJGTCI-UHFFFAOYSA-I 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、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 a surface-treated steel sheet with excellent corrosion resistance.
〈従来の技術〉
溶融めっき法によるＡ１めっき鋼板、Ａ１合金めっき鋼
板は、耐食性、耐熱性に優れるため従来より自動車のマ
フラー、ストーブなどの暖房器具、オーブンなどの厨房
器具等、耐食性、耐熱性が要求される用途に広（適用さ
れている。<Conventional technology> A1-plated steel sheets and A1 alloy-plated steel sheets produced by hot-dip plating have excellent corrosion resistance and heat resistance, and have traditionally been used in automobile mufflers, heaters such as stoves, kitchen appliances such as ovens, etc. Widely applied to required applications.
ところが、溶融めっき法によるＡｌ系めっきは７００℃
程度の高温で行われるため、母材の性質を劣化させる欠
点があった。 さらに、めっき皮膜と下地鋼板の間に脆
いＡｌ−Ｆｅ合金層が生成し、このため加工性が低下し
重大な問題となっていた。However, Al-based plating by hot-dip plating is heated to 700°C.
Since it is carried out at relatively high temperatures, it has the disadvantage of degrading the properties of the base material. Furthermore, a brittle Al--Fe alloy layer is formed between the plating film and the underlying steel sheet, which reduces workability and poses a serious problem.
一方、Ａｌは水溶液から電析しないため、塩化アルミニ
ウム（ＡｌＣ１，）等を主成分とする溶融塩からの電気
Ａｌめっきが従来より考案されている。 この方法によ
ると、２００℃程度の低温でＡｌめっきが可能であるた
め、母材の性質が劣化せず、またＡｌ−Ｆｅ合金層が生
成しないので加工性も劣化しない。 しかし、溶融塩電
気Ａ１めっきは１０ Ａ ／ ｄ ｍ ２以上の実用的
な電流密度でめっきを行うとめっき皮膜がパウダー状ま
たは樹脂状となり、このため耐食性が劣化する問題があ
った。On the other hand, since Al is not electrodeposited from an aqueous solution, electrolytic Al plating from a molten salt mainly composed of aluminum chloride (AlC1,) or the like has been devised. According to this method, Al plating is possible at a low temperature of about 200° C., so the properties of the base material do not deteriorate, and since an Al-Fe alloy layer is not generated, workability does not deteriorate. However, molten salt electroplating A1 has a problem in that when plating is performed at a practical current density of 10 A/dm2 or more, the plating film becomes powder-like or resin-like, resulting in deterioration of corrosion resistance.
このような溶融塩電気Ａ１めっきの欠点を改善するため
、溶融塩電気めっき法によるＡｌ−Ｍｎめっき鋼板（特
公昭４３−１８２４５号公報）、Ａ１−Ｃｒめっき鋼板
（特公昭５３−１２１２号公報）、Ａｌ−Ｍｎ−Ｃｒめ
っき鋼板（特開昭６１−２３８９９５号公報）、Ａｌ−
Ｐｂめっき鋼板（特開昭５６−６２９８６号公報）等が
提案されている。 また、蒸着めっき法によるＡｌ−Ｃ
ｒめっき鋼板（特開昭６４−２１０６０号公報）、Ａ１
−Ｔｊめっき鋼板（特開昭６４−２８３５９号公報）等
が提案されている。In order to improve the drawbacks of molten salt electroplating A1, Al-Mn plated steel sheets (Japanese Patent Publication No. 18245/1983) and A1-Cr plated steel sheets (Japanese Patent Publication No. 1212/1982) were developed using molten salt electroplating. , Al-Mn-Cr plated steel sheet (Japanese Unexamined Patent Publication No. 61-238995), Al-
Pb-plated steel sheets (Japanese Patent Laid-Open No. 56-62986) and the like have been proposed. In addition, Al-C by vapor deposition plating method
r-plated steel plate (Japanese Unexamined Patent Publication No. 64-21060), A1
-Tj plated steel sheets (Japanese Unexamined Patent Publication No. 64-28359) have been proposed.
これらのＡ１合金めっき鋼板の耐食性はＡ１めっき鋼板
よりも優れているが、例えば自動車のマフラーのような
厳しい腐食環境で使用した場合には耐食性が十分とはい
えず、さらに耐食性の優れたＡ１合金めっき鋼板の開発
が切望されていた。Although the corrosion resistance of these A1 alloy-plated steel sheets is superior to that of A1-plated steel sheets, the corrosion resistance is not sufficient when used in severe corrosive environments such as automobile mufflers. The development of galvanized steel sheets was desperately needed.
〈発明が解決しようとする課題〉
上述のように、これまでに知られているＡｌ−Ｍｎめっ
き鋼板、Ａｌ−Ｃｒめっき鋼板、Ａｌ−Ｍｎ−Ｃｒめっ
き鋼板、Ａ １−Ｐｂめっき鋼板、Ａｌ−Ｔｉめっき鋼
板等のＡ１合金めっき鋼板は、例えば自動車のマフラー
のような厳しい腐食環境下での耐食性が不十分である。<Problems to be Solved by the Invention> As mentioned above, hitherto known Al-Mn plated steel sheets, Al-Cr plated steel sheets, Al-Mn-Cr plated steel sheets, A1-Pb plated steel sheets, Al- A1 alloy-plated steel sheets such as Ti-plated steel sheets have insufficient corrosion resistance in severe corrosive environments such as, for example, automobile mufflers.
本発明の目的は、上記従来技術の問題点を解決した、耐
食性に優れた表面処理鋼板を提供することにある。An object of the present invention is to provide a surface-treated steel sheet with excellent corrosion resistance, which solves the problems of the prior art described above.
く課題を解決するための手段〉 すなわち、本発明は、鋼板上に、Ｖ、Ｎｂ。Means to solve problems〉 That is, the present invention provides V and Nb on a steel plate.
Ｔａ、Ｍｏ、およびＷよりなる群より選ばれた少なくと
も１種を合計で０．１〜５０重置％含有し、残部が実質
的にＡＩからなるめっき層を１〜４０ ｇ ／ ｍ ”
有することを特徴とする耐食性に優れた表面処理鋼板を
提供するものである。The plating layer contains at least one selected from the group consisting of Ta, Mo, and W at a total weight of 0.1 to 50%, and the remainder is substantially AI, at a density of 1 to 40 g/m.
The present invention provides a surface-treated steel sheet having excellent corrosion resistance.
また、前記めっき層が溶融塩電気めっき法により形成さ
れたものであるのが好ましい。Further, it is preferable that the plating layer is formed by molten salt electroplating.
以下、本発明について詳細に説明する。The present invention will be explained in detail below.
本発明者らは、耐食性に優れた表面処理鋼板を実現する
ために、種々のＡ１合金めっき鋼板について鋭意検討を
重ねた結果、Ｖ、Ｎｂ。In order to realize a surface-treated steel sheet with excellent corrosion resistance, the present inventors have conducted extensive studies on various A1 alloy plated steel sheets, and have found that V, Nb.
Ｔａ、Ｍｏ、およびＷよりなる群より選ばれた少なくと
も１種の元素を合計で０１１〜５０重量％含有し、残部
が実質的にＡｌからなるめっき層を１〜４０ ｇ ／
ｍ ”有するＡ１合金めっき鋼板が最も耐食性が優れて
いることを新規に見い出した。 これらのＡ１合金めっ
き鋼板の耐食性が優れている理由は、めっき皮膜が極め
て緻密な保護皮膜であるとともに、Ｖ、Ｎｂ。A plating layer containing a total of 0.11 to 50% by weight of at least one element selected from the group consisting of Ta, Mo, and W, with the remainder substantially consisting of Al, at a weight of 1 to 40 g/
It has been newly discovered that A1 alloy plated steel sheets with V, Nb.
Ｔａ、Ｍｏ、Ｗが腐食によるＡ１の溶出を抑制すること
によるものと考えられる。This is thought to be due to the fact that Ta, Mo, and W suppress the elution of A1 due to corrosion.
めっき層中（７）Ｖ、Ｎｂ、Ｔａ、Ｍｏ、Ｗ（７）１種
または２種以上の含有率の合計は０．１〜５０重量％で
ある。 含有率が０．１重量％未満では所望の耐食性を
得ることができず、５０重量％を越えるとめっき皮膜が
硬くなり、加工性の点で好ましくない。 含有率の合計
が５〜４０重量％であればより好ましい。The total content of one or more of (7) V, Nb, Ta, Mo, and W (7) in the plating layer is 0.1 to 50% by weight. If the content is less than 0.1% by weight, the desired corrosion resistance cannot be obtained, and if it exceeds 50% by weight, the plating film becomes hard, which is not preferable in terms of workability. It is more preferable that the total content is 5 to 40% by weight.
めっき層の付着量は１〜４０ ｇ ／ ｍ ２である。The amount of adhesion of the plating layer is 1 to 40 g/m2.
めっき付着量が１ｇ７ｍ２未満では所望の耐食性を得
ることができず、４０ｇ／ｍ”を越えると加工性の点で
好ましくない、 めっき付着量が５〜３０ｇ／ｍ”であ
ればより好ましい。If the coating weight is less than 1 g/m2, the desired corrosion resistance cannot be obtained, and if it exceeds 40 g/m'', it is unfavorable from the viewpoint of workability. It is more preferable if the coating weight is 5 to 30 g/m''.
めっき層の形成方法としては、溶融塩または非水溶媒か
らの電気めっき法、真空蒸着法等、公知の方法がいずれ
も適用可能であるが、操業コスト等の点より、溶融塩か
らの電気めっき法が特に好ましく適用される。 また、
溶融塩からの電気めっき法によってめっき層を形成する
際のめっき条件には特に限定はなく、通常行われている
溶融塩電気めっき法によればよい。As a method for forming the plating layer, any known method such as electroplating from molten salt or a non-aqueous solvent, vacuum evaporation method, etc. can be applied, but from the viewpoint of operating costs etc., electroplating from molten salt is preferable. The law is particularly preferably applied. Also,
There are no particular limitations on the plating conditions when forming a plating layer by electroplating from molten salt, and a commonly used molten salt electroplating method may be used.
〈実施例〉 以下、本発明を実施例により具体的に説明する。<Example> Hereinafter, the present invention will be specifically explained with reference to Examples.
（実施例１）
通常の方法で脱脂、酸洗した冷延鋼板を非酸化性雰囲気
中で乾燥し、めっき温度まで予熱した後、下記の溶融塩
Ａｌ−Ｖ合金めっき浴からＡｌ−Ｖ合金めっきを行った
。(Example 1) A cold-rolled steel sheet that has been degreased and pickled in a conventional manner is dried in a non-oxidizing atmosphere, preheated to the plating temperature, and then Al-V alloy plated from the following molten salt Al-V alloy plating bath. I did it.
浴組成： ＡｌＣ１ｚ ６０ｍｏ １％ＮａＣ１２６
ｍ ｏ １％
ＫＣＩ １４ ｍ ｏ １％
ＶＣｌ５ １００〜３００．０００ｐｐｍ添加浴温度
＝２００℃
電流密度： １〜１００Ａ／ｄｍ２
なお、ｖｃｔｓの添加量および電流密度を変化させるこ
とによりＡｔ−Ｖ合金めつき層における■含有率をコン
トロールした。Bath composition: AlC1z 60mo 1% NaC126
m o 1% KCI 14 m o 1% VCl5 100 to 300.000 ppm Addition bath temperature = 200°C Current density: 1 to 100 A/dm2 At-V alloy plating can be achieved by changing the amount of vcts added and current density. The ■ content in the layer was controlled.
形成したＡｌ−Ｖ合金めつき層中の■含有率およびめっ
き付着量を表１に示す。Table 1 shows the ■ content and amount of plating in the formed Al-V alloy plating layer.
（実施例２）
実施例１のｖｃｉ、の代わりにＮｂＣ１，を用い、その
他は実施例１と同様の方法でＡｌ−Ｎｂ合金めっきを行
った。(Example 2) Al-Nb alloy plating was performed in the same manner as in Example 1 except that NbC1 was used instead of vci in Example 1.
形成したＡｌ−Ｎｂ合金めつき層中のＮｂ含有率および
めっき付着量を表２に示す。Table 2 shows the Nb content and amount of plating in the formed Al-Nb alloy plating layer.
（実施例３）
実施例１のｖｃｉ、の代わりにＴａＣ１ｇを用い、その
他は実施例１と同様の方法でＡｌ−Ｔａ合金めっきを行
った。(Example 3) Al-Ta alloy plating was performed in the same manner as in Example 1 except that 1 g of TaC was used instead of vci in Example 1.
形成したＡｌ−Ｔａ合金めつき層中のＴａ含有率および
めっき付着量を表３に示す。Table 3 shows the Ta content and amount of plating in the formed Al-Ta alloy plating layer.
（実施例４）
実施例１のＶＣｌ、の代わりにＭｏＣｌ５を用い、その
他は実施例１と同様の方法でＡｌ −Ｍｏ合金めっきを
行った。(Example 4) Al--Mo alloy plating was performed in the same manner as in Example 1 except that MoCl5 was used instead of VCl in Example 1.
形成したＡ ｌ−Ｍｏ合金めっき層中のＭｏ含有率およ
びめっき付着量を表４に示す。Table 4 shows the Mo content and amount of plating in the formed Al-Mo alloy plating layer.
（実施例５）
実施例１のＶＣＩｇの代わりにＷＣｌ５を用い、その他
は実施例１と同様の方法でＡｌ−Ｗ合金めっきを行った
。(Example 5) Al-W alloy plating was performed in the same manner as in Example 1 except that WCl5 was used instead of VCIg in Example 1.
形成し°たＡｌ−Ｗ合金めっき層中のＷ含有率およびめ
っき付着量を表５に示す。Table 5 shows the W content and amount of plating in the formed Al-W alloy plating layer.
（実施例６）
実施例１ （７）ＶＣｌｍ（７）代わりにＶＣｌ、、
ＮｂＣ１，。(Example 6) Example 1 (7) VClm(7) Instead of VCl,
NbC1,.
ＴａＣ１１，ＭｏＣ１ｇ、 ＷＣｌ５のうちの２種を用
い、その他は実施例１と同様の方法でＡ １−Ｘ−Ｙ
（Ｘ、Ｙ＝Ｖ、Ｎｂ、Ｔａ、Ｍｏ、Ｗ、Ｘ≠Ｙ）合金め
っきを行った。A1-X-Y was prepared in the same manner as in Example 1 except for using two of TaC11, MoC1g, and WCl5.
(X, Y=V, Nb, Ta, Mo, W, X≠Y) Alloy plating was performed.
形成したＡ １−Ｘ−Ｙ合金めっき層中のＸ含有率、Ｙ
含有率およびめっき付着量を表６に示す。X content in the formed A1-X-Y alloy plating layer, Y
Table 6 shows the content and coating amount.
表７に、従来より行われている本発明の範囲外の各種の
Ａ１合金めっき鋼板を比較のために示す。Table 7 shows various conventional A1 alloy plated steel sheets outside the scope of the present invention for comparison.
このようにして作製した各種のＡ１合金めっき鋼板の耐
食性をＳ Ｓ Ｔ （ＪＩＳ Ｚ ２３７１）により評
価した。 評価方法は下記のとおりである。The corrosion resistance of the various A1 alloy plated steel sheets produced in this way was evaluated by SST (JIS Z 2371). The evaluation method is as follows.
× １００日以内に赤錆発生
△ 赤錆発生まで１００日以上
Ｏ赤錆発生まで２００日以上
表１〜６に示すように、本発明の表面処理鋼板は優れた
耐食性を示す。× Red rust occurs within 100 days Δ 100 days or more until red rust occurs O 200 days or more until red rust occurs As shown in Tables 1 to 6, the surface-treated steel sheet of the present invention exhibits excellent corrosion resistance.
上記の結果より本発明の効果は明らかである。The effects of the present invention are clear from the above results.
表 １ 実施例１の結果
表 ２ 実施例２の結果
表 ３ 実施例３の結果
表 ４ 実施例４の結果
表 ５ 実施例５の結果
表 ６ 実施例６の結果
表 ７
〈発明の効果〉
以上詳細に説明したとおり、本発明の表面処理鋼板は、
鋼板上に、Ｖ、Ｎｂ、Ｔａ、Ｍｏ。Table 1 Results table of Example 1 2 Results table of Example 2 3 Results table of Example 3 4 Results table of Example 4 5 Results table of Example 5 6 Results table of Example 6 7 <Effects of the invention> Above As explained in detail, the surface-treated steel sheet of the present invention is
V, Nb, Ta, Mo on the steel plate.
Ｗの１種または２種以上を含有するＡ１合金めっき層を
有することにより、耐食性に極めて優れた表面処理鋼板
を実現したものであり、その工業的価値は非常に高いも
のである。By having an A1 alloy plating layer containing one or more types of W, a surface-treated steel sheet with extremely excellent corrosion resistance has been realized, and its industrial value is extremely high.
Claims (2)
なる群より選ばれた少なくとも１種を合計で０．１〜５
０重量％含有し、残部が実質的にＡｌからなるめっき層
を１〜４０ｇ／ｍ＾２有することを特徴とする耐食性に
優れた表面処理鋼板。(1) At least one selected from the group consisting of V, Nb, Ta, Mo, and W is applied on the steel plate in a total of 0.1 to 5
A surface-treated steel sheet with excellent corrosion resistance, characterized by having a plating layer of 1 to 40 g/m^2 containing 0% by weight and the remainder substantially consisting of Al.
れたものである請求項１に記載の耐食性に優れた表面処
理鋼板。(2) The surface-treated steel sheet with excellent corrosion resistance according to claim 1, wherein the plating layer is formed by molten salt electroplating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32378090A JPH04191392A (en) | 1990-11-27 | 1990-11-27 | Surface-treated steel sheet having superior corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32378090A JPH04191392A (en) | 1990-11-27 | 1990-11-27 | Surface-treated steel sheet having superior corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04191392A true JPH04191392A (en) | 1992-07-09 |
Family
ID=18158540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32378090A Pending JPH04191392A (en) | 1990-11-27 | 1990-11-27 | Surface-treated steel sheet having superior corrosion resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04191392A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486224A (en) * | 1993-12-28 | 1996-01-23 | Sumitomo Metal Industries, Ltd. | Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets |
-
1990
- 1990-11-27 JP JP32378090A patent/JPH04191392A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486224A (en) * | 1993-12-28 | 1996-01-23 | Sumitomo Metal Industries, Ltd. | Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets |
| US5527504A (en) * | 1993-12-28 | 1996-06-18 | Sumitomo Metal Industries, Ltd. | Powder mixture for use in compaction to produce rare earth iron sintered permanent magnets |
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