GB1109743A - Scale removal - Google Patents
Scale removalInfo
- Publication number
- GB1109743A GB1109743A GB358566A GB358566A GB1109743A GB 1109743 A GB1109743 A GB 1109743A GB 358566 A GB358566 A GB 358566A GB 358566 A GB358566 A GB 358566A GB 1109743 A GB1109743 A GB 1109743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- copper
- air
- nitrogen
- potassium
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- 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
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Scale containing iron oxides, copper and copper oxides is removed from e.g. boiler and heat exchanger tubes, and the cleaned surfaces passivated using a neutral solution of ammonium citrate. The process is then continued with a pH of at least 9 until the copper content of the solution is constant. The solution may be agitated with air or nitrogen. Oxidizing agents, e.g. air, oxygen or nitrogen tetraoxide or the sodium, potassium or ammonium salts of persulphates, perchlorates, bromates and nitrites, potassium permanganate, or the sodium salt of nitrophenylsulphoric acid, may be added to the solution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB358566A GB1109743A (en) | 1966-01-26 | 1966-01-26 | Scale removal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB358566A GB1109743A (en) | 1966-01-26 | 1966-01-26 | Scale removal |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1109743A true GB1109743A (en) | 1968-04-10 |
Family
ID=9761119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB358566A Expired GB1109743A (en) | 1966-01-26 | 1966-01-26 | Scale removal |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1109743A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0268361A1 (en) * | 1986-11-20 | 1988-05-25 | Rem Chemicals, Inc. | Solution, composition and process of refining metal surfaces |
WO1995030781A2 (en) * | 1994-05-05 | 1995-11-16 | Sjunnesson Sales Acc | Method of removing chloride ion or a compound thereof from a surface contaminated therewith |
WO1998039110A1 (en) * | 1997-03-06 | 1998-09-11 | H.E.R.C. Products Incorporated | Pipe system cleaning and in-line treatment of spent cleaning solution |
GB2384185A (en) * | 2001-12-06 | 2003-07-23 | Barrie Mellor | Cleaning method and apparatus comprising the use of dinitrogen tetraoxide |
CN103147086A (en) * | 2013-04-03 | 2013-06-12 | 济南瑞东实业有限公司 | Ethylene cracking and cleaning agent and preparation method thereof |
-
1966
- 1966-01-26 GB GB358566A patent/GB1109743A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0268361A1 (en) * | 1986-11-20 | 1988-05-25 | Rem Chemicals, Inc. | Solution, composition and process of refining metal surfaces |
AU582315B2 (en) * | 1986-11-20 | 1989-03-16 | Rem Chemicals, Inc. | Composition and method for metal surface refinement |
WO1995030781A2 (en) * | 1994-05-05 | 1995-11-16 | Sjunnesson Sales Acc | Method of removing chloride ion or a compound thereof from a surface contaminated therewith |
WO1995030781A3 (en) * | 1994-05-05 | 1996-03-07 | Sjunnesson Sales Acc | Method of removing chloride ion or a compound thereof from a surface contaminated therewith |
US5609692A (en) * | 1994-05-05 | 1997-03-11 | Chlor Rid International, Inc. | Method of removing chloride ion or a compound thereof from a surface contaminated therewith |
WO1998039110A1 (en) * | 1997-03-06 | 1998-09-11 | H.E.R.C. Products Incorporated | Pipe system cleaning and in-line treatment of spent cleaning solution |
GB2384185A (en) * | 2001-12-06 | 2003-07-23 | Barrie Mellor | Cleaning method and apparatus comprising the use of dinitrogen tetraoxide |
GB2384185B (en) * | 2001-12-06 | 2003-12-17 | Barrie Mellor | Cleaning process |
CN103147086A (en) * | 2013-04-03 | 2013-06-12 | 济南瑞东实业有限公司 | Ethylene cracking and cleaning agent and preparation method thereof |
CN103147086B (en) * | 2013-04-03 | 2015-04-08 | 济南瑞东实业有限公司 | Ethylene cracking and cleaning agent and preparation method thereof |
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