GB228278A - Improved process for cleaning and de-scaling of metals - Google Patents
Improved process for cleaning and de-scaling of metalsInfo
- Publication number
- GB228278A GB228278A GB2790623A GB2790623A GB228278A GB 228278 A GB228278 A GB 228278A GB 2790623 A GB2790623 A GB 2790623A GB 2790623 A GB2790623 A GB 2790623A GB 228278 A GB228278 A GB 228278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- articles
- temperature
- mav
- anodes
- immersed
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/22—Polishing of heavy metals
- C25F3/24—Polishing of heavy metals of iron or steel
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
228,278. Rondelli, T. Nov. 6, 1923. Pickling. - Articles of " stainless " iron and steel and other iron steel. nickel, and cobalt alloys with chromium and other metals are cleaned by immersion as anodes in a solution containing 15 per cent or more of caustic alkali at a high temperature below its boiling-point until the scale is removed or converted into easily soluble compounds. The temperature mav be from 110‹ C. to 150‹ C., and is preferably 140‹ C. The current density may be from 1 to 20 and is preferably from 4 to 5 amperes per sq. dem. After the above treatment the articles may be immersed in dilute hydrochloric or sulphuric acid until a bright white metal surface appears. The two operations may be repeated if necessary. The articles are then rinsed in water and dried. To obtain extra bright surfaces the articles mav after the first alkaline treatment be immersed as anodes in a dense solution of caustic soda at a temperature between ordinary temperature and 95‹ C., preferably at 70‹ C. A light yellowish stain is formed which is dissolved easily in a very weak acid solution. The stain left by the first alkaline bath or the second alkaline bath, if used, may alternatively be removed by making the articles cathodes for a short time. The articles are held in a carrier frame. The tank may form the cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2790623A GB228278A (en) | 1923-11-06 | 1923-11-06 | Improved process for cleaning and de-scaling of metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2790623A GB228278A (en) | 1923-11-06 | 1923-11-06 | Improved process for cleaning and de-scaling of metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB228278A true GB228278A (en) | 1925-02-05 |
Family
ID=10267187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2790623A Expired GB228278A (en) | 1923-11-06 | 1923-11-06 | Improved process for cleaning and de-scaling of metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB228278A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368424A (en) * | 2018-06-15 | 2021-02-12 | 阿尔贝托·托德斯卡 | Electrolytic treatment method for coating stainless steel objects |
-
1923
- 1923-11-06 GB GB2790623A patent/GB228278A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112368424A (en) * | 2018-06-15 | 2021-02-12 | 阿尔贝托·托德斯卡 | Electrolytic treatment method for coating stainless steel objects |
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