JPH11264087A - Treating liquid for descaling stainless steel and its usage - Google Patents
Treating liquid for descaling stainless steel and its usageInfo
- Publication number
- JPH11264087A JPH11264087A JP6499598A JP6499598A JPH11264087A JP H11264087 A JPH11264087 A JP H11264087A JP 6499598 A JP6499598 A JP 6499598A JP 6499598 A JP6499598 A JP 6499598A JP H11264087 A JPH11264087 A JP H11264087A
- Authority
- JP
- Japan
- Prior art keywords
- descaling
- stainless steel
- acid
- present
- solution
- 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
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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/086—Iron or steel solutions containing HF
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱間加工の際に、
あるいは熱処理の際にステンレス鋼の表面にできたスケ
ールを除去するための処理液とその使用方法に関する。TECHNICAL FIELD The present invention relates to a method for hot working,
Alternatively, the present invention relates to a treatment liquid for removing scale formed on the surface of stainless steel during heat treatment and a method of using the treatment liquid.
【０００２】[0002]
【従来の技術】ステンレス鋼のスケールを除去するため
には、通常は硝酸−弗酸の酸洗液が用いられている。し
かし近年、廃棄された硝酸あるいは硝酸塩は環境汚染を
起こすために規制が強化される趨勢にある。2. Description of the Related Art In order to remove the scale of stainless steel, a pickling solution of nitric acid and hydrofluoric acid is usually used. However, in recent years, there has been a tendency that regulations on discarded nitric acid or nitrate cause environmental pollution, and the regulations have been tightened.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、硝酸、硝酸
塩の廃棄量を十分に低減する事ができ、かつ従来よりも
高能率でスケールを除去する事が可能な、ステンレス鋼
のデスケール処理液とその使用方法の提供を課題として
いる。DISCLOSURE OF THE INVENTION The present invention provides a descaling solution for stainless steel which can sufficiently reduce the amount of waste of nitric acid and nitrate and can remove scale more efficiently than before. And how to use it.
【０００４】[0004]
【課題を解決するための手段】本発明は（１）硫酸を２
５〜８０ｇ／Ｌ，塩酸を１〜１０ｇ／Ｌ，弗酸を１〜１
５ｇ／Ｌ含有し且つＦｅ3+を５ｇ／Ｌ以上含有する事を
特徴とする、フェライト系、マルテンサイト系ステンレ
ス鋼のデスケール用処理液である。The present invention provides (1) sulfuric acid with 2
5-80 g / L, hydrochloric acid 1-10 g / L, hydrofluoric acid 1-1
A descaling solution for ferritic and martensitic stainless steels, characterized in that it contains 5 g / L and contains Fe 3+ in an amount of 5 g / L or more.
【０００５】また（２）硫酸を６０〜２５０ｇ／Ｌ，塩
酸を１〜２５ｇ／Ｌ，弗酸を１０〜５０ｇ／Ｌ含有し且
つＦｅ3+を５ｇ／Ｌ以上含有する事を特徴とする、オー
ステナイト系ステンレス鋼のデスケール用処理液であ
る。(2) It is characterized by containing 60 to 250 g / L of sulfuric acid, 1 to 25 g / L of hydrochloric acid, 10 to 50 g / L of hydrofluoric acid, and containing 5 g / L or more of Fe 3+ . This is a descaling treatment solution for austenitic stainless steel.
【０００６】また（３）３０〜７０℃の前記（１）の処
理液を用いて、過酸化水素水を継続あるいは断続的に添
加し、同時に空気を１０ｍ3／ｈｒ／ｍ3以上継続吹き込
むことによりＦｅ3+を５ｇ／Ｌ以上に維持して、フェラ
イト系、マルテンサイト系ステンレス鋼のデスケーリン
グを行うことを特徴とする、前記（１）記載のデスケー
ル用処理液の使用方法である。[0006] (3) Hydrogen peroxide solution is continuously or intermittently added using the treatment liquid of the above (1) at 30 to 70 ° C., and air is continuously blown in at a rate of 10 m 3 / hr / m 3 or more. (1) The method for using a descaling treatment liquid according to the above (1), wherein the descaling of the ferritic or martensitic stainless steel is performed while maintaining Fe 3+ at 5 g / L or more.
【０００７】また（４）３０〜７０℃の前記（２）の処
理液を用いて、過酸化水素水を継続あるいは断続的に添
加し、同時に空気を１０ｍ3／ｈｒ／ｍ3以上継続吹き込
むことによりＦｅ3+を５ｇ／Ｌ以上に維持して、オース
テナイト系ステンレス鋼のデスケーリングを行うことを
特徴とする、前記（２）記載のデスケール用処理液の使
用方法である。(4) Hydrogen peroxide solution is continuously or intermittently added using the treatment solution of the above (2) at 30 to 70 ° C., and air is continuously blown in at a rate of 10 m 3 / hr / m 3 or more. The descaling of the austenitic stainless steel according to the above (2), wherein Fe 3+ is maintained at 5 g / L or more.
【０００８】本発明の処理液は、単一の処理槽を用いる
バッチ式デスケーリングに使用してもよいが、連続式デ
スケーリング装置において、２以上の処理槽のそれぞれ
に収納して使用してもよい。この場合、浸漬型、スプレ
イ型両方式に適用可能である。またソルトバスを有する
連続式デスケーリングにおいても使用する事ができる。
尚本発明の処理液によるデスケーリングの前段階に、必
要に応じて公知の予備洗浄を行い、また後段階で必要に
応じて公知のデスマット、中和、水洗等を行う事はいう
までもない。また、公知の安定化剤を用いた過酸化水素
を用いて添加する。The processing solution of the present invention may be used for batch-type descaling using a single processing tank. However, in a continuous-type descaling apparatus, the processing solution is stored and used in each of two or more processing tanks. Is also good. In this case, both the immersion type and the spray type can be applied. It can also be used in continuous descaling with a salt bath.
It is needless to say that prior to descaling with the treatment liquid of the present invention, a known preliminary washing is performed as necessary, and a known desmutting, neutralization, washing and the like are performed as necessary in a later stage. . In addition, it is added using hydrogen peroxide using a known stabilizer.
【０００９】[0009]
【発明の実施形態及び実施例】本発明者等は、JIS SUS4
30ステンレス鋼（フェライト系ステンレス鋼）の熱延線
材を焼鈍後、表１に示した各処理液に５分間浸漬し、デ
スケーリング状況を調査した。尚表１のＦｅ3+の濃度は
Ｆｅ2(ＳＯ4)3の添加により調整した。表１でデスケー
ルは目視観察の結果で、×：極めて不十分、△：不十
分、○：良好である。また過酸洗は酸洗肌荒れの程度を
拡大鏡を用いて観察した結果で、×：肌荒れ甚だしい、
△：稍肌荒れ、○：良好である。Embodiments and Examples of the Invention The present inventors have adopted JIS SUS4
After annealing a hot-rolled wire of 30 stainless steel (ferritic stainless steel), it was immersed in each of the treatment solutions shown in Table 1 for 5 minutes, and the state of descaling was investigated. The Fe 3+ concentration in Table 1 was adjusted by adding Fe 2 (SO 4 ) 3 . In Table 1, the descaling is the result of visual observation. ×: extremely insufficient, Δ: insufficient, ○: good. In addition, in the case of over-acid cleaning, the degree of roughness of the pickled skin was observed using a magnifying glass.
Δ: slightly rough skin, ○: good.
【００１０】[0010]
【表１】 [Table 1]
【００１１】表１で番号１および２はＨＣｌ、ＨＦを含
有していない比較例である。Ｆｅ３＋が２ｇ／Ｌの場合
も、７ｇ／Ｌの場合もデスケールは極めて不十分であ
る。In Table 1, Nos. 1 and 2 are comparative examples containing neither HCl nor HF. Descaling is extremely insufficient when Fe 3+ is 2 g / L or 7 g / L.
【００１２】番号３はＨＣｌを含有しない比較例であり
デスケールは不十分である。しかし番号３にＨＣｌを２
ｇ／Ｌ添加した番号４（本発明例）ではデスケール性は
顕著に改善されている。また番号４には過酸洗も発生し
ていない。尚番号４はＨＣｌが２ｇ／ＬでＨＦが５ｇ／
Ｌの例であるが、それぞれが１ｇ／Ｌ以上であれば、同
様に良好な結果が得られる。また番号４はＨ２ＳＯ4が
３０ｇ／Ｌの例であるが、２５ｇ／Ｌ以上であれば同様
に良好な結果が得られる。No. 3 is a comparative example containing no HCl, and the descaling is insufficient. However, add HCl to number 3
In the case of No. 4 (Example of the present invention) to which g / L was added, the descalability was remarkably improved. No. 4 also shows no peracid washing. No. 4 shows that HCl is 2 g / L and HF is 5 g / L.
L is an example, but if each is 1 g / L or more, similarly good results can be obtained. In addition, No. 4 is an example in which H 2 SO 4 is 30 g / L, but if it is 25 g / L or more, similarly good results can be obtained.
【００１３】番号５はＦｅ3+が少ない比較例である。デ
スケールは良好であるが、過酸洗に起因する肌荒れがみ
られる。No. 5 is a comparative example having a small amount of Fe 3+ . Descaling is good, but rough skin due to peracid washing is observed.
【００１４】番号６は比較例で、Ｈ2ＳＯ4及びＨＦは高
濃度に含有するが、ＨＣｌを含有していない。この際は
デスケールが不十分である。No. 6 is a comparative example, which contains H 2 SO 4 and HF in high concentration but does not contain HCl. In this case, the descaling is insufficient.
【００１５】番号７は番号６にＨＣｌを含有させた処理
液で、Ｈ2ＳＯ4，ＨＣｌ，ＨＦの何れもが高濃度の本発
明の処理液であるが、デスケールも良好で肌荒れもな
い。番号８はＦｅ3+濃度が低い比較例であるが、Ｆｅ3+
の濃度が５ｇ／Ｌ以下になると肌荒れが発生する。No. 7 is a treating solution containing HCl in No. 6 and all of H 2 SO 4 , HCl and HF are the treating solutions of the present invention having a high concentration, but have good descaling and no rough skin. Number 8 is the low comparative example Fe 3+ concentration but, Fe 3+
Is less than 5 g / L, rough skin occurs.
【００１６】番号９はＨＣｌの濃度が１０ｇ／Ｌ超の高
過ぎる比較例で、Ｎｏ１０はＨＦの濃度が１５ｇ／Ｌ超
の高過ぎる比較例である。何れもデスケール性は良好で
あるが、本発明よりも濃度が高い場合には過酸洗が発生
する。尚Ｈ2ＳＯ4の濃度が８０ｇ／Ｌを超えても格別の
支障はないが、格別の効果もない。このため８０ｇ／Ｌ
以下が経済的に好ましい。No. 9 is a comparative example in which the concentration of HCl is too high, exceeding 10 g / L, and No. 10 is a comparative example in which the concentration of HF is too high, exceeding 15 g / L. Both have good descaling properties, but when the concentration is higher than in the present invention, peracid washing occurs. Although there is no particular problem even if the concentration of H 2 SO 4 exceeds 80 g / L, there is no particular effect. For this reason 80g / L
The following are economically preferred.
【００１７】これ等の結果に基づいて、本発明では硫
酸：２５〜８０ｇ／Ｌ，塩酸：１〜１０ｇ／Ｌ，弗酸：
１０〜１５ｇ／Ｌ，Ｆｅ3+：５ｇ／Ｌ以上とする。本発
明の処理液を用いると、５分以内の短時間で、過酸洗を
発生させる事なく、フェライト系ステンレス鋼をデスケ
ール処理する事ができる。尚本発明者等は JIS 403ステ
ンレス鋼（マルテンサイト系ステンレス鋼）についても
同様のデスケール試験を行ったが、本発明の処理液を用
いると、この際にも、５分以内の短時間で、過酸洗を発
生させることなくデスケール処理することができた。Based on these results, in the present invention, sulfuric acid: 25 to 80 g / L, hydrochloric acid: 1 to 10 g / L, hydrofluoric acid:
10 to 15 g / L, Fe 3+ : 5 g / L or more. When the treatment liquid of the present invention is used, the descaling treatment of the ferritic stainless steel can be performed in a short time of 5 minutes or less without causing over-acid washing. In addition, the present inventors conducted a similar descaling test on JIS 403 stainless steel (martensitic stainless steel). However, when the treatment liquid of the present invention was used, in this case, in a short time of 5 minutes or less, The descaling process could be performed without generating over-acid washing.
【００１８】硝酸−弗酸系の従来の処理液を用いた場合
は、フェライト系ステンレス鋼マルテンサイト系ステン
レス鋼のデスケールは、５分の浸漬では不十分であり、
このため、操業としては１０分間の浸漬が行われてい
た。本発明によると上記の如くこの浸漬時間を５分間に
短縮する事ができた。When a conventional nitric acid-hydrofluoric acid-based treatment liquid is used, the descaling of ferritic stainless steel martensitic stainless steel is not sufficient if it is immersed for 5 minutes.
For this reason, immersion for 10 minutes was performed as an operation. According to the present invention, the immersion time can be reduced to 5 minutes as described above.
【００１９】本発明の処理液は、３０〜７０℃にして用
いる事が好ましい。３０℃未満では作業条件によりデス
ケール結果に変動が発生し易い。しかし７０℃以下で十
分であり、これ以上の高温加熱は、熱経済的に好ましく
ない。The treatment liquid of the present invention is preferably used at 30 to 70 ° C. If the temperature is lower than 30 ° C., the result of the descaling tends to vary depending on the working conditions. However, a temperature of 70 ° C. or less is sufficient, and heating at a higher temperature than this is not economically preferable.
【００２０】本発明でＦｅ3+は、ステンレス鋼のマトリ
ックスと反応しＦｅ2+となるために、処理中にその濃度
が低減する。過酸化水素水を継続添加すると、Ｆｅ2+は
酸化されてＦｅ3+の濃度を維持する事ができる。この際
には処理液の酸化還元電位を＋２５０ｍＶ以上とする量
添加する事が好ましい。また処理液に空気を吹き込む
と、Ｆｅ2+は酸化されてＦｅ3+の濃度を維持する事がで
きる。この際には継続して１０ｍ3／ｈｒ／ｍ3以上の割
合で吹き込む事が好ましい。In the present invention, since Fe 3+ reacts with the stainless steel matrix to form Fe 2+ , its concentration is reduced during the treatment. When the hydrogen peroxide solution is continuously added, Fe 2+ is oxidized and the concentration of Fe 3+ can be maintained. In this case, it is preferable to add an amount to make the oxidation-reduction potential of the processing solution +250 mV or more. Further, when air is blown into the processing liquid, Fe 2+ is oxidized and the concentration of Fe 3+ can be maintained. In this case, it is preferable to continuously blow at a rate of 10 m 3 / hr / m 3 or more.
【００２１】本発明者等はまた、JIS SUS 304 ステンレ
ス鋼（オーステナイト系ステンレス鋼）の熱延線材を溶
体化熱処理後、表２に示した各処理液に５分間浸漬し、
デスケーリング状況を調査した。尚Ｆｅ3+の濃度の調
整、デスケールの評価基準、過酸洗の評価基準は表１と
同じである。The present inventors also conducted a solution heat treatment of a hot-rolled wire made of JIS SUS 304 stainless steel (austenitic stainless steel) and then immersed in each of the treatment solutions shown in Table 2 for 5 minutes.
The descaling situation was investigated. Adjustment of Fe 3+ concentration, evaluation criteria for descaling, and evaluation criteria for peracid washing are the same as those in Table 1.
【００２２】[0022]
【表２】 [Table 2]
【００２３】番号１１はＨＣｌを含有しない比較例でデ
スケールが極めて不十分である。ＨＣｌを５％含有する
番号１２はデスケールは十分であるが、Ｆｅ3+が少ない
ために過酸洗となる。No. 11 is a comparative example containing no HCl, and the descaling is extremely insufficient. No. 12 containing 5% HCl has sufficient descaling, but is peracid-washed due to the small amount of Fe 3+ .
【００２４】番号１３は、本発明例でデスケールも十分
で過酸洗もない。尚Ｈ2ＳＯ4は６０ｇ／Ｌ以上であれ
ば、またＨＣｌは１ｇ／Ｌ以上であれば、またＨＦは１
０ｇ／Ｌ以上であれば、またＦｅ3+は５ｇ／Ｌ以上であ
れば、番号１３と同様の好ましい結果が得られる。Numeral 13 is an example of the present invention in which the descaling is sufficient and there is no peracid washing. Note that H 2 SO 4 is 60 g / L or more, HCl is 1 g / L or more, and HF is 1 g / L or more.
If it is 0 g / L or more, and if Fe 3+ is 5 g / L or more, the same preferable result as that of No. 13 can be obtained.
【００２５】番号１４は比較例で、Ｈ2ＳＯ4及びＨＦは
高濃度に含有するが、ＨＣｌを含有していない。この際
はデスケールが不十分となる。No. 14 is a comparative example, which contains H 2 SO 4 and HF at high concentrations but does not contain HCl. In this case, the descaling becomes insufficient.
【００２６】番号１５は番号１４にＨＣｌを含有させた
処理液で、Ｈ2ＳＯ4，ＨＣｌ，ＨＦの何れもが高濃度の
本発明の処理液であるが、デスケールも良好で肌荒れも
ない。番号１６はＦｅ3+が少ない比較例であるが、Ｆｅ
3+が５ｇ／Ｌ未満となると過酸洗が発生する。No. 15 is a treating solution containing HCl in No. 14 and is a treating solution of the present invention in which all of H 2 SO 4 , HCl and HF are high in concentration, but has good descaling and no rough skin. No. 16 is a comparative example having a small amount of Fe 3+ ,
When 3+ is less than 5 g / L, peracid washing occurs.
【００２７】番号１７はＨＦが過剰な比較例で、番号１
８はＨＣｌが過剰な比較例であるが、何れの場合にも顕
著な肌荒れが観察された。No. 17 is a comparative example in which HF is excessive.
8 is a comparative example in which HCl is excessive, but in each case, remarkable skin roughness was observed.
【００２８】尚Ｈ2ＳＯ4の濃度が２５０ｇ／Ｌを超えて
も格別の支障はないが、格別の効果もない。このため２
５０ｇ／Ｌ以下が経済的に好ましい。Although the concentration of H 2 SO 4 exceeds 250 g / L, there is no particular problem, but there is no particular effect. Therefore 2
50 g / L or less is economically preferable.
【００２９】これ等の結果に基づいて、本発明では、硫
酸：６０〜２５０ｇ／Ｌ，塩酸：１〜２５ｇ／Ｌ，弗
酸：１０〜１５ｇ／Ｌ，Ｆｅ3+：５ｇ／Ｌ以上とする。
本発明の処理液を用いると、５分以内の短時間内で、過
酸洗を発生させることなく、オーステナイト系ステンレ
ス鋼をデスケール処理する事ができる。Based on these results, in the present invention, sulfuric acid: 60 to 250 g / L, hydrochloric acid: 1 to 25 g / L, hydrofluoric acid: 10 to 15 g / L, Fe 3+ : 5 g / L or more .
When the treatment liquid of the present invention is used, the austenitic stainless steel can be descaled within a short time of 5 minutes or less without causing over-acid washing.
【００３０】硝酸−弗酸系の従来の処理液を用いた場合
は、オーステナイト系ステンレス鋼のデスケールは、５
分間の浸漬では不十分であり、このため操業としては１
０分間の浸漬が行われていた。本発明によると、上記の
如く、この浸漬時間を５分間に短縮する事ができた。When a conventional nitric acid-hydrofluoric acid treatment solution is used, the descaling of austenitic stainless steel is 5%.
Minutes of immersion is not enough, and the
A 0 minute immersion was performed. According to the present invention, as described above, the immersion time could be reduced to 5 minutes.
【００３１】表２の本発明の処理液も、表１で述べたと
同様に、３０〜７０℃にして用いる事が好ましく、また
表１で述べたと同じ理由で処理中には過酸化水素水を処
理液の酸化還元電位が＋２５０ｍＶとなる量継続添加
し、あるいは空気を１０ｍ3／ｈｒ／ｍ3以上継続して吹
き込む事が好ましい。The treating solution of the present invention shown in Table 2 is preferably used at a temperature of 30 to 70 ° C. as described in Table 1, and for the same reason as described in Table 1, hydrogen peroxide solution is used during the treatment. It is preferable to continuously add the treatment solution in such an amount that the oxidation-reduction potential becomes +250 mV, or to blow air continuously at 10 m 3 / hr / m 3 or more.
【００３２】本発明では短時間内にデスケールができる
が、これは本発明の処理液中の塩酸が、高温時にステン
レス鋼の表面に形成されたクロム欠乏層の優先的な溶失
に大きく寄与したことによるものと想考される。また本
発明では過酸洗が発生しないが、これは、本発明の処理
液中のＦｅ3+が、クロム欠乏層が溶失した後のステンレ
ス鋼の表面の溶失の防止に寄与したことによるものと想
考される。In the present invention, descaling can be performed within a short period of time. This is because hydrochloric acid in the processing solution of the present invention greatly contributed to preferential loss of a chromium-depleted layer formed on the surface of stainless steel at high temperatures. It is thought to be due to this. Further, in the present invention, no peracid washing occurs, but this is because Fe 3+ in the treatment liquid of the present invention contributed to the prevention of the loss of the stainless steel surface after the chromium-depleted layer was lost. It is thought to be a thing.
【００３３】[0033]
【発明の効果】本発明では、硝酸を使用しないために、
硝酸あるいは硝酸塩の廃棄による環境汚染を防止する事
ができる。本発明によると従来よりも高能率でスケール
を除去する事ができる。According to the present invention, since nitric acid is not used,
Environmental pollution due to disposal of nitric acid or nitrate can be prevented. According to the present invention, scale can be removed with higher efficiency than before.
Claims (4)
ｇ／Ｌ，弗酸を１〜１５ｇ／Ｌ含有しかつＦｅ3+を５ｇ
／Ｌ以上含有する事を特徴とする、フェライト系、マル
テンサイト系ステンレス鋼のデスケール用処理液。(1) 25 to 80 g / L of sulfuric acid and 1 to 10 g of hydrochloric acid.
g / L, containing 1 to 15 g / L of hydrofluoric acid and 5 g of Fe 3+
/ L or more, which is a desalting treatment solution for ferritic and martensitic stainless steels.
５ｇ／Ｌ，弗酸を１０〜５０ｇ／Ｌ含有し且つＦｅ3+を
５ｇ／Ｌ以上含有する事を特徴とする、オーステナイト
系ステンレス鋼のデスケール用処理液。2. A mixture of sulfuric acid of 60 to 250 g / L and hydrochloric acid of 1 to 2 g.
An austenitic stainless steel descaling solution comprising 5 g / L, 10 to 50 g / L hydrofluoric acid and 5 g / L or more Fe 3+ .
て、過酸化水素水を継続あるいは断続的に添加し、同時
に空気を１０ｍ3／ｈｒ／ｍ3以上継続吹き込むことによ
りＦｅ3+を５ｇ／Ｌ以上に維持して、フェライト系、マ
ルテンサイト系ステンレス鋼のデスケーリングを行うこ
とを特徴とする、請求項１記載のデスケール用処理液の
使用方法。3. using the processing liquid according to claim 1 of 30 to 70 ° C., continuously or intermittently adding aqueous hydrogen peroxide, Fe 3 by blowing simultaneously continuing the air 10 m 3 / hr / m 3 or more The method for using a treatment solution for descaling according to claim 1, wherein the descaling of the ferritic or martensitic stainless steel is performed while maintaining + at 5 g / L or more.
て、過酸化水素水を継続あるいは断続的に添加し、同時
に空気を１０ｍ3／ｈｒ／ｍ3以上継続吹き込むことによ
りＦｅ3+を５ｇ／Ｌ以上に維持して、オーステナイト系
ステンレス鋼のデスケーリングを行うことを特徴とす
る、請求項２記載のデスケール用処理液の使用方法。4. using the processing liquid according to claim 2 of 30 to 70 ° C., continuously or intermittently adding aqueous hydrogen peroxide, Fe 3 by blowing simultaneously continuing the air 10m 3 / hr / m 3 or more The method according to claim 2, wherein the austenitic stainless steel is descaled while maintaining + at 5 g / L or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06499598A JP4045006B2 (en) | 1998-03-16 | 1998-03-16 | Stainless steel descaling solution and method of use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06499598A JP4045006B2 (en) | 1998-03-16 | 1998-03-16 | Stainless steel descaling solution and method of use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11264087A true JPH11264087A (en) | 1999-09-28 |
| JP4045006B2 JP4045006B2 (en) | 2008-02-13 |
Family
ID=13274166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06499598A Expired - Lifetime JP4045006B2 (en) | 1998-03-16 | 1998-03-16 | Stainless steel descaling solution and method of use |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4045006B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089900A (en) * | 2001-09-17 | 2003-03-28 | Daido Steel Co Ltd | Method of descaling metallic strip |
| WO2003048418A3 (en) * | 2001-12-07 | 2004-08-26 | Henkel Kgaa | Method for pickling martensitic or ferritic high-grade steel |
| JP2005350734A (en) * | 2004-06-10 | 2005-12-22 | Nippon Steel & Sumikin Stainless Steel Corp | Method for manufacturing ferritic stainless steel strip having good coating adhesion |
| JP2006503182A (en) * | 2002-10-15 | 2006-01-26 | ヘンケル・コマンディットゲゼルシャフト・アウフ・アクチエン | Solutions and methods for pickling or brightening / passivating steel and stainless steel |
| EP1980650A1 (en) * | 2007-04-05 | 2008-10-15 | Kerma S.A. | Pickling composition free from nitrates and peroxides, and method using such a composition |
| US7699936B2 (en) | 2003-08-11 | 2010-04-20 | Gm Global Technology Operations, Inc. | Composition and method for surface treatment of oxidized metal |
| CN102912369A (en) * | 2012-11-08 | 2013-02-06 | 安徽昌泰特钢有限公司 | Automatic acid-washing process for steel tubes |
| CN103820777A (en) * | 2013-12-16 | 2014-05-28 | 攀钢集团江油长城特殊钢有限公司 | Stainless steel passivating method and used mixed solution |
| CN104018166A (en) * | 2014-06-13 | 2014-09-03 | 中国船舶重工集团公司第七二五研究所 | In-service austenitic stainless steel cleaning passivator in marine environment |
-
1998
- 1998-03-16 JP JP06499598A patent/JP4045006B2/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003089900A (en) * | 2001-09-17 | 2003-03-28 | Daido Steel Co Ltd | Method of descaling metallic strip |
| WO2003048418A3 (en) * | 2001-12-07 | 2004-08-26 | Henkel Kgaa | Method for pickling martensitic or ferritic high-grade steel |
| JP2006503182A (en) * | 2002-10-15 | 2006-01-26 | ヘンケル・コマンディットゲゼルシャフト・アウフ・アクチエン | Solutions and methods for pickling or brightening / passivating steel and stainless steel |
| US7699936B2 (en) | 2003-08-11 | 2010-04-20 | Gm Global Technology Operations, Inc. | Composition and method for surface treatment of oxidized metal |
| JP2005350734A (en) * | 2004-06-10 | 2005-12-22 | Nippon Steel & Sumikin Stainless Steel Corp | Method for manufacturing ferritic stainless steel strip having good coating adhesion |
| EP1980650A1 (en) * | 2007-04-05 | 2008-10-15 | Kerma S.A. | Pickling composition free from nitrates and peroxides, and method using such a composition |
| CN102912369A (en) * | 2012-11-08 | 2013-02-06 | 安徽昌泰特钢有限公司 | Automatic acid-washing process for steel tubes |
| CN103820777A (en) * | 2013-12-16 | 2014-05-28 | 攀钢集团江油长城特殊钢有限公司 | Stainless steel passivating method and used mixed solution |
| CN104018166A (en) * | 2014-06-13 | 2014-09-03 | 中国船舶重工集团公司第七二五研究所 | In-service austenitic stainless steel cleaning passivator in marine environment |
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|---|---|
| JP4045006B2 (en) | 2008-02-13 |
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