JPS5547387A - Concentration-controlling method for mixed pickling fluid of nitric acid and hydrofluoric acid - Google Patents
Concentration-controlling method for mixed pickling fluid of nitric acid and hydrofluoric acidInfo
- Publication number
- JPS5547387A JPS5547387A JP12043478A JP12043478A JPS5547387A JP S5547387 A JPS5547387 A JP S5547387A JP 12043478 A JP12043478 A JP 12043478A JP 12043478 A JP12043478 A JP 12043478A JP S5547387 A JPS5547387 A JP S5547387A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- pickling
- acid
- soln
- contained
- 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
- C23G1/36—Regeneration of waste pickling liquors
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
PURPOSE:To conduct pickling of stainless steel etc. efficiently so as to reduce the cost for pickling, by maintaining the concns. of Fe<3+> and F<-> contained in a nitric acid-hydrofluoric acid pickling fluid in the limit no FeF3 deposits while being used for pickling stainless steel etc., either by discharging suitably the pickling soln. or by ion exchange of the soln. when the concns. are increased to not lower than a set concns. CONSTITUTION:Quantity of Fe<3+> and total quantity of F<-> are monitored by the analyzer 5 of the pickling soln., which is contained in a nitric acid-hydrofluoric acid pickling tank 1, for pickling iron or steel material. When the concns. are in the ranges Fe<3+>>30g/l, F<->>60g/l, the pickling soln. contained in the tank 1 is introduced into a reservoir 2. Acids from a recovered acid tank 4 and a fresh acid tank 6, and water are added to the tank 1 to adjust the soln. contained in the tank 1 to a concn. suitable for pickling. The waste acid contained in the tank 2 is led to a diffusing and dialyzing tank 3, where HF and HNO3 are recovered with an ionexchange membrane. The recovered acid is transferred to the tank 4, and dialyzed soln. F contg. metallic ions such as Fe<3+> as a principal component to a waste acid treating unit. The recovered soln. contained in the tank 4 is analyzed to determine the concns. of HNO3 and HF and is prepared for being introduced to the pickling tank 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12043478A JPS6035995B2 (en) | 1978-10-02 | 1978-10-02 | Concentration control method for nitric acid pickling bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12043478A JPS6035995B2 (en) | 1978-10-02 | 1978-10-02 | Concentration control method for nitric acid pickling bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5547387A true JPS5547387A (en) | 1980-04-03 |
| JPS6035995B2 JPS6035995B2 (en) | 1985-08-17 |
Family
ID=14786107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12043478A Expired JPS6035995B2 (en) | 1978-10-02 | 1978-10-02 | Concentration control method for nitric acid pickling bath |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6035995B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5953687A (en) * | 1982-05-21 | 1984-03-28 | Tokuyama Soda Co Ltd | Preparation of pickling solution |
| AT374508B (en) * | 1982-07-01 | 1984-05-10 | Ruthner Industrieanlagen Ag | METHOD FOR PROCESSING USED BEIZER OR CORROSIVE SOLUTIONS BASED ON SALPETER FLUORIC ACID |
| CN106048626A (en) * | 2016-07-06 | 2016-10-26 | 浙江久德不锈钢型材有限公司 | Acid pickling process of stainless steel resistant to salt fog |
-
1978
- 1978-10-02 JP JP12043478A patent/JPS6035995B2/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5953687A (en) * | 1982-05-21 | 1984-03-28 | Tokuyama Soda Co Ltd | Preparation of pickling solution |
| JPS6054394B2 (en) * | 1982-05-21 | 1985-11-29 | 株式会社トクヤマ | How to prepare pickling solution |
| AT374508B (en) * | 1982-07-01 | 1984-05-10 | Ruthner Industrieanlagen Ag | METHOD FOR PROCESSING USED BEIZER OR CORROSIVE SOLUTIONS BASED ON SALPETER FLUORIC ACID |
| CN106048626A (en) * | 2016-07-06 | 2016-10-26 | 浙江久德不锈钢型材有限公司 | Acid pickling process of stainless steel resistant to salt fog |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6035995B2 (en) | 1985-08-17 |
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