JPH0680190B2 - Method for improving rust resistance of brightly annealed ferrite stainless steel - Google Patents
Method for improving rust resistance of brightly annealed ferrite stainless steelInfo
- Publication number
- JPH0680190B2 JPH0680190B2 JP61303230A JP30323086A JPH0680190B2 JP H0680190 B2 JPH0680190 B2 JP H0680190B2 JP 61303230 A JP61303230 A JP 61303230A JP 30323086 A JP30323086 A JP 30323086A JP H0680190 B2 JPH0680190 B2 JP H0680190B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- rust resistance
- oxide
- bright
- improving
- 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 - Fee Related
Links
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims description 29
- 229910001220 stainless steel Inorganic materials 0.000 title claims description 25
- 238000000034 method Methods 0.000 title claims description 17
- 239000010935 stainless steel Substances 0.000 title description 9
- 229910000859 α-Fe Inorganic materials 0.000 title 1
- 239000000463 material Substances 0.000 claims description 28
- 238000011282 treatment Methods 0.000 claims description 17
- 239000004115 Sodium Silicate Substances 0.000 claims description 14
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 14
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 14
- 238000000137 annealing Methods 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000007654 immersion Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002585 base Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Description
【発明の詳細な説明】 本発明は、自動車、家庭電化製品、厨房設備、建築材等
の各種内外装材に用いられるフェライト系ステンレス鋼
光輝焼鈍材の耐銹性を改善する方法に関する。The present invention relates to a method for improving the rust resistance of ferritic stainless steel bright annealed materials used for various interior and exterior materials such as automobiles, home appliances, kitchen equipment, and building materials.
〈先行技術とその問題点〉 フェライト系ステンレス鋼による光輝焼鈍（以下「BA」
と略称する）材は、黒光りのする美麗な表面光沢を有す
るため、自動車、家庭電化製品、建築材等の各種内外装
材として用いられているが、海岸地帯での外装や、塩分
を含む食品を入れるショーケース等Cl-イオンの存在す
る環境で使用された場合、発銹し易いという問題が生じ
ている。特にBA材は、通常の不動態被膜に保護されたス
テンレス鋼材と異なり、光輝焼鈍時の極く薄い酸化被膜
に覆われているため耐銹性が劣化し易い傾向にあった。<Prior art and its problems> Bright annealing with ferritic stainless steel (hereinafter "BA")
Is used as various interior and exterior materials for automobiles, home appliances, building materials, etc. because it has a beautiful surface luster that shines black. When used in an environment where Cl - ions are present, such as in a showcase, there is a problem that rusting is easy. In particular, the BA material, unlike a stainless steel material protected by a normal passivation film, was covered with an extremely thin oxide film at the time of bright annealing, and thus the rust resistance tended to deteriorate.
そこで、近年、フェライト系ステンレス鋼BA材の耐銹性
を改善する方法が種々検討されている。Therefore, in recent years, various methods for improving the rust resistance of the ferritic stainless steel BA material have been investigated.
従来、光輝焼鈍ステンレス鋼の耐銹性改善方法に関する
技術としては、特開昭59-23882号公報、特開昭54-14214
0号公報、特開昭54-142142号公報等に開示されている
が、これらはいずれも光輝焼鈍後のステンレス鋼を電解
処理することにより行われるものである。Conventionally, as a technique relating to the method of improving the rust resistance of bright annealed stainless steel, JP-A-59-23882 and JP-A-54-14214 are known.
No. 0, JP-A-54-142142, etc., all of which are carried out by electrolytically treating the stainless steel after bright annealing.
このような電解処理を行う場合、製造ライン中に新たな
電解処理設備の設置が必要となり、コストアップを招
く。また、電解処理によって、光輝焼鈍による酸化被膜
のみならずステンレス素地も溶解され、その結果表面光
沢を損うという欠点もある。When such electrolytic treatment is performed, it is necessary to install new electrolytic treatment equipment in the production line, which causes an increase in cost. Further, the electrolytic treatment has a drawback that not only the oxide film formed by bright annealing but also the stainless steel substrate is dissolved, and as a result, the surface gloss is impaired.
〈発明の目的〉 本発明の目的は、上述した従来技術の欠点を解消し、ス
テンレス鋼BA材に電解処理を施こすことなくその耐銹性
を改善することができるフェライト系ステンレス鋼光輝
焼鈍材の耐銹性改善方法を提供することにある。<Object of the Invention> The object of the present invention is to eliminate the drawbacks of the prior art described above, and to improve the rust resistance of stainless steel BA material without subjecting it to electrolytic treatment, a ferritic stainless steel bright annealed material. It is to provide a method of improving rust resistance.
〈発明の構成〉 このような目的を達成するために、本発明者らはBA材の
酸化被膜について詳細に調査研究した結果、耐銹性を劣
化させる原因は、BA被膜の最表面に存在するMn酸化物層
にあり、このMn酸化物層を除去または薄くすることによ
り著しく耐銹性が向上することを見い出した。<Structure of the Invention> In order to achieve such an object, the present inventors conducted a detailed investigation and research on the oxide film of the BA material, and as a result, the cause of deteriorating the rust resistance exists on the outermost surface of the BA film. It was found in the Mn oxide layer that the rust resistance was remarkably improved by removing or thinning the Mn oxide layer.
そこで、本発明者らは更に研究を進め、BA被膜中に存在
するSi酸化物（SiO2であると考えられる）がアルカリに
溶解し易いことを利用し、Si酸化物と共にMn酸化物も同
時に溶解除去するアルカリ浸漬法を開発し、本願と同日
付で特許出願した。Therefore, the present inventors have conducted further research, utilizing the fact that the Si oxide (which is considered to be SiO 2 ) existing in the BA film is easily dissolved in alkali, and at the same time, the Si oxide and the Mn oxide are simultaneously dissolved. We developed an alkaline dipping method for dissolution and removal, and filed a patent application on the same date as this application.
即ち、この出願に係る発明は、フェライト系ステンレス
鋼光輝焼鈍材を製造するに際し、光輝焼鈍処理後に、光
輝焼鈍材を１〜20wt％のNaOHを含有し、室温〜100℃の
水溶液に１分以上浸漬することを特徴とするフェライト
系ステンレス鋼光輝焼鈍材の耐銹性改善方法である。That is, the invention according to this application, when producing a ferritic stainless steel bright annealed material, after the bright annealing treatment, the bright annealed material contains 1 to 20 wt% of NaOH, room temperature ~ 100 ℃ 1 minute or more in an aqueous solution A method for improving the rust resistance of a bright annealed material of a ferritic stainless steel, which is characterized by dipping.
しかるに、更に研究を進めた結果、BA被膜中に存在する
Si酸化物は耐銹性向上にとって有効であり、その含有率
が高いほど耐銹性に優れることが判明した。However, as a result of further research, it is present in the BA film.
It was found that Si oxide is effective for improving rust resistance, and the higher the content, the better the rust resistance.
ここで、上記特許出願に係る発明では、アルカリ浸漬液
としてNaOHの水溶液を用いるため、Mn酸化物と共にSi酸
化物も溶解除去されてしまう。Here, in the invention according to the above-mentioned patent application, since the aqueous solution of NaOH is used as the alkali immersion liquid, the Si oxide is dissolved and removed together with the Mn oxide.
そこで、BA被膜中にて耐銹性向上に有効なSi酸化物を減
少させることなく、耐銹性を劣化させる要因となるMn酸
化物のみを除去することができるアルカリ浸漬液を調
査、研究した結果、所定濃度および温度のケイ酸ナトリ
ウム水溶液を用いるとBA被膜中のSi酸化物を減少させる
ことなく、Mn酸化物を除去することができることを見い
出し、本発明に至った。Therefore, we investigated and studied an alkaline immersion liquid that can remove only Mn oxide that is a factor that deteriorates rust resistance without reducing Si oxide that is effective in improving rust resistance in the BA film. As a result, they have found that the Mn oxide can be removed without reducing the Si oxide in the BA coating by using an aqueous sodium silicate solution having a predetermined concentration and temperature, and the present invention has been completed.
即ち、本発明は、フェライト系ステンレス鋼光輝焼鈍材
を製造するに際し、光輝焼鈍処理後に、光輝焼鈍材を、
0.5〜10wt％のケイ酸ナトリウムを含有し、室温〜100℃
の水溶液に30秒以上浸漬することを特徴とするフェライ
ト系ステンレス鋼光輝焼鈍材の耐銹性改善方法を提供す
るものである。That is, the present invention, when producing a ferritic stainless steel bright annealing material, after the bright annealing treatment, the bright annealing material,
Contains 0.5-10wt% sodium silicate, room temperature-100 ° C
And a method for improving the rust resistance of a bright annealed material of a ferritic stainless steel, which is characterized by immersing in the aqueous solution for 30 seconds or more.
BA材を上記ケイ酸ナトリウムの水溶液に浸漬すると、BA
被膜中から一旦Si酸化物とMn酸化物が溶解されるが、そ
の後浸漬液の成分であるSiO2が再付着するため、結果的
にBA被膜中のSi酸化物は減少しない。When the BA material is immersed in the above aqueous solution of sodium silicate, BA
The Si oxide and the Mn oxide are once dissolved from the film, but the SiO 2 which is a component of the immersion liquid is redeposited after that, so that the Si oxide in the BA film is not reduced as a result.
なお、前述した従来技術である各種電解処理を施す方法
でもMn酸化物層を除去することができるが、この場合に
はステンレス素地まで溶解されてしまうために表面光沢
が劣化する。これに対し、本発明法ではMn酸化物とBA被
膜のみを溶解し、ステンレス素地は溶解されないため、
表面光沢の劣化がほとんどない。Although the Mn oxide layer can be removed by the above-described method of performing various electrolytic treatments, which is the conventional technique, in this case, the surface luster is deteriorated because the stainless steel body is also dissolved. On the other hand, in the method of the present invention, only the Mn oxide and the BA coating are dissolved, and the stainless steel base is not dissolved,
Almost no deterioration of surface gloss.
以下、本発明のフェライト系ステンレス鋼光輝焼鈍材の
耐銹性改善方法について詳細に説明する。Hereinafter, the method for improving the rust resistance of the brightly annealed ferritic stainless steel of the present invention will be described in detail.
本発明は、BA処理後のフェライト系ステンレス鋼を、ア
ルカリのケイ酸ナトリウム水溶液に浸漬することによ
り、BA被膜中の耐銹性向上にとって有効なSi酸化物を減
少させることなく、耐銹性を劣化させる要因となるMn酸
化物のみを溶解除去（または減少）するものである。The present invention, the ferritic stainless steel after BA treatment, by immersing in an alkaline sodium silicate aqueous solution, without reducing the Si oxide effective for rust resistance improvement in the BA coating, rust resistance This is to remove (or reduce) only Mn oxide that causes deterioration.
対象材は、フェライト系のステンレス鋼（鋼板、条鋼、
鋼管等）である。フェライト系以外のステンレス鋼材に
対しては、BA被膜中にMn酸化物があまり生成しないた
め、それほど有効とはならない。The target material is ferritic stainless steel (steel plate, bar steel,
Steel pipe). It is not so effective for stainless steel materials other than ferritic steel because Mn oxides are not formed much in the BA film.
光輝焼鈍処理としては、例えばフェライト系ステンレス
鋼の冷延板をアンモニア分解ガスまたはN2＋H2混合ガス
の雰囲気中で800〜1000℃程度で0.5〜３分間光輝焼鈍す
る。ただし、BA処理の条件は、これらに限定されるもの
ではない。As the bright annealing treatment, for example, a cold rolled sheet of ferritic stainless steel is bright annealed at about 800 to 1000 ° C. for 0.5 to 3 minutes in an atmosphere of ammonia decomposition gas or N 2 + H 2 mixed gas. However, the BA processing conditions are not limited to these.
BA処理後のアルカリ浸漬に用いる溶液は0.5〜10wt％の
ケイ酸ナトリウム水溶液である。溶液濃度を0.5〜10wt
％の範囲に限定する理由は、0.5wt％未満ではアルカリ
性が不足し、Mn酸化物を十分に除去することができず、
また10wt％を超えてもMn酸化物を除去する能力が飽和
し、耐銹性向上の効果に伸びがないからである。The solution used for alkali immersion after the BA treatment is a 0.5 to 10 wt% sodium silicate aqueous solution. Solution concentration 0.5 ~ 10wt
The reason for limiting the content to the range of 0.5% is that if it is less than 0.5% by weight, the alkalinity is insufficient and the Mn oxide cannot be sufficiently removed.
Further, even if it exceeds 10 wt%, the ability to remove Mn oxide is saturated and the effect of improving rust resistance does not extend.
前記ケイ酸ナトリウム水溶液の液温は、室温（20℃前
後）〜100℃の範囲、好ましくは60〜90℃の範囲とす
る。その理由は、液温が室温未満であると反応に時間が
かかるため不経済であり、また液温が100℃を超えても
反応速度が速まらず、時間短縮にならないからである。The liquid temperature of the aqueous sodium silicate solution is in the range of room temperature (around 20 ° C) to 100 ° C, preferably 60 to 90 ° C. The reason is that if the liquid temperature is lower than room temperature, the reaction takes time, which is uneconomical, and even if the liquid temperature exceeds 100 ° C., the reaction speed does not increase and the time is not shortened.
BA材の前記ケイ酸ナトリウム水溶液への浸漬時間は、30
秒以上である。その理由は、浸漬時間が30秒未満である
と、前記濃度のケイ酸ナトリウム水溶液ではMn酸化物を
十分に除去することができないからである。The immersion time of the BA material in the aqueous solution of sodium silicate is 30
More than a second. The reason is that if the immersion time is less than 30 seconds, the Mn oxide cannot be sufficiently removed with the sodium silicate aqueous solution having the above concentration.
〈実施例〉 代表的フェライト系ステンレス鋼であるSUS430を1.0mm
厚まで冷間圧延し、露点−48℃のアンモニア分解ガス中
にて830℃、１分間の光輝焼鈍を行い、次いでスキンパ
ス圧延を行った（上記工程はすべて商用生産の設備を用
いて行われた）。<Example> 1.0 mm of typical ferritic stainless steel SUS430
Cold-rolled to thickness, bright-annealed at 830 ° C. for 1 minute in ammonia decomposition gas with dew point of −48 ° C., and then skin pass rolling (all the above steps were performed using commercial production equipment) ).
このようにして製造されたSUS430BA材のBA被膜の構造を
グロー放電分光法により分析した。その結果を第１図の
グラフに示す。同図に示すように、BA被膜の最表面には
耐銹性を劣化させる原因となるMn酸化物層が存在するこ
とがわかる。The structure of the BA coating film of the SUS430BA material thus manufactured was analyzed by glow discharge spectroscopy. The results are shown in the graph of FIG. As shown in the figure, it can be seen that there is an Mn oxide layer that causes deterioration of rust resistance on the outermost surface of the BA coating.
次に、このSUS430BA材を表１に示す種々の条件のケイ酸
ナトリウム水溶液に浸漬し、水洗して試料Ａ〜Ｎを得
た。Next, this SUS430BA material was immersed in an aqueous sodium silicate solution under various conditions shown in Table 1 and washed with water to obtain samples A to N.
また、ケイ酸ナトリウム水溶液に浸漬していないSUS430
BA材（前記と同様の方法により製造）の試料ＯおよびSU
S430BA材（前記と同様の方法により製造）に電解処理
（60℃、10％HNO3、15C/dm2）を施した試料Ｐを作製し
た。In addition, SUS430 not immersed in sodium silicate solution
Samples O and SU of BA material (manufactured by the same method as above)
A sample P was prepared by subjecting S430BA material (manufactured by the same method as above) to electrolytic treatment (60 ° C., 10% HNO 3 , 15 C / dm 2 ).
かくして得られた各試料Ａ〜Ｐについて耐銹性評価試験
および表面の白色度の測定を行った。その結果を表１に
示す。For each of the samples A to P thus obtained, the rust resistance evaluation test and the whiteness of the surface were measured. The results are shown in Table 1.
なお、耐銹性評価試験としてはJIS Z 2371に規定される
塩水噴霧試験に基づき、50℃にて16時間塩水噴霧した
後、噴霧を休止した状態で８時間保持した。これを１サ
イクルとし、３サイクル試験した後の試験片の単位面積
当りの発銹個数により耐銹性を評価した。As the rust resistance evaluation test, based on the salt spray test specified in JIS Z 2371, after spraying salt water for 16 hours at 50 ° C., the spray was held for 8 hours in a suspended state. This was defined as one cycle, and the rust resistance was evaluated by the number of rusting per unit area of the test piece after three cycles of testing.
また、白色度は、デジタル測色色差計ND-101DC型（日本
電色工業（株））によって測定した。この白色度の数値
が大きいほど表面光沢が劣ることを示す。The whiteness was measured with a digital colorimetric color difference meter ND-101DC type (Nippon Denshoku Industries Co., Ltd.). The larger the whiteness value, the poorer the surface gloss.
下記表１の結果からわかるように、本発明法により得ら
れた試料Ａ〜Ｉは、それ以外の試料Ｊ〜Ｐに比べ、白色
度の増加を伴うことなく、即ち表面光沢を損うことな
く、耐銹性が著しく向上している。As can be seen from the results in Table 1 below, Samples A to I obtained by the method of the present invention did not cause an increase in whiteness, that is, did not impair the surface gloss, as compared with the other samples J to P. , The rust resistance is remarkably improved.
次に、本発明法によるケイ酸ナトリウム水溶液浸漬処理
後のBA被膜の構造を調べるために、表１中の試料Ｅにつ
いてそのBA被膜の構造をグロー放電分光法により分析し
た。その結果を第２図のグラフに示す。同図に示すよう
に、BA被膜中のSi酸化物が減少することなく、Mn酸化物
層のみが、除去され、薄くなっていることがわかる。Next, in order to investigate the structure of the BA film after the immersion treatment with the aqueous sodium silicate solution according to the method of the present invention, the structure of the BA film of Sample E in Table 1 was analyzed by glow discharge spectroscopy. The results are shown in the graph of FIG. As shown in the figure, it can be seen that only the Mn oxide layer is removed and thinned without reducing the Si oxide in the BA film.
〈発明の効果〉 本発明のフェライト系ステンレス鋼光輝焼鈍材の耐銹性
改善方法によれば、光輝焼鈍処理後に、光輝焼鈍材を、
0.5〜10wt％のケイ酸ナトリウムを含有し、室温〜100℃
の水溶性液に30秒以上浸漬することにより、電解処理を
行った場合に生じる表面光沢の劣化がなく、しかも光輝
焼鈍被膜中の耐銹性向上にとって有効なSi酸化物を減少
することなく、耐銹性を損う要因となるMn酸化物のみを
溶解除去するので、極めて優れた耐銹性を得ることがで
きる。 <Effects of the Invention> According to the method for improving the rust resistance of the ferritic stainless steel bright annealed material of the present invention, after the bright annealing treatment, the bright annealed material is
Contains 0.5-10wt% sodium silicate, room temperature-100 ° C
By immersing in an aqueous solution for 30 seconds or more, there is no deterioration of surface gloss that occurs when electrolytic treatment is performed, and without reducing the Si oxide effective for improving rust resistance in the bright annealing coating, Since only the Mn oxide, which is a factor that impairs rust resistance, is dissolved and removed, extremely excellent rust resistance can be obtained.
また、本発明は電解処理設備等の付設を必要としないた
め、コストの面で有利である。In addition, the present invention is advantageous in terms of cost because it does not require additional equipment such as electrolytic treatment equipment.
第１図は、実施例におけるSUS430BA材のBA被膜の構造を
示すグラフである。 第２図は、実施例におけるケイ酸ナトリウム水溶液浸漬
処理後のSUS430BA材（試料Ｅ）のBA被膜の構造を示すグ
ラフである。FIG. 1 is a graph showing the structure of the BA coating of the SUS430BA material in the examples. FIG. 2 is a graph showing the structure of the BA coating of the SUS430BA material (Sample E) after the immersion treatment with the sodium silicate aqueous solution in the example.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭55−60081（ＪＰ，Ａ) 特開 昭59−1685（ＪＰ，Ａ) 特開 昭63−7387（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-55-60081 (JP, A) JP-A-59-1685 (JP, A) JP-A-63-7387 (JP, A)
Claims (1)
造するに際し、 光輝焼鈍処理後に、光輝焼鈍材を、0.5〜10wt％のケイ
酸ナトリウムを含有し、室温〜100℃の水溶液に30秒以
上浸漬することを特徴とするフェライト系ステンレス鋼
光輝焼鈍材の耐銹性改善方法。1. When manufacturing a bright annealed material of ferritic stainless steel, after the bright annealing treatment, the bright annealed material is immersed in an aqueous solution containing 0.5 to 10 wt% of sodium silicate at room temperature to 100 ° C. for 30 seconds or more. A method for improving rust resistance of bright annealed ferritic stainless steel, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61303230A JPH0680190B2 (en) | 1986-12-19 | 1986-12-19 | Method for improving rust resistance of brightly annealed ferrite stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61303230A JPH0680190B2 (en) | 1986-12-19 | 1986-12-19 | Method for improving rust resistance of brightly annealed ferrite stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63157885A JPS63157885A (en) | 1988-06-30 |
| JPH0680190B2 true JPH0680190B2 (en) | 1994-10-12 |
Family
ID=17918444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61303230A Expired - Fee Related JPH0680190B2 (en) | 1986-12-19 | 1986-12-19 | Method for improving rust resistance of brightly annealed ferrite stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0680190B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS531733A (en) * | 1976-06-28 | 1978-01-10 | San Toreedeingu Kk | Noise preventing apparatus for ignition energy augument apparatus |
| JPS5334167A (en) * | 1976-09-10 | 1978-03-30 | Ishikawatoki Tekkosho Kk | Apparatus for removing stuck material in roller crusher |
| JPH0718016B2 (en) * | 1982-06-29 | 1995-03-01 | 新日本製鐵株式會社 | Method for producing stainless steel with excellent rust resistance |
| JPS637387A (en) * | 1986-06-25 | 1988-01-13 | Kawasaki Steel Corp | Manufacture of stainless steel having superior corrosion resistance at weld zone |
-
1986
- 1986-12-19 JP JP61303230A patent/JPH0680190B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63157885A (en) | 1988-06-30 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |