JPS57134566A - Preventing method for corrosion of inside of condensing pipe made of copper alloy - Google Patents
Preventing method for corrosion of inside of condensing pipe made of copper alloyInfo
- Publication number
- JPS57134566A JPS57134566A JP2033481A JP2033481A JPS57134566A JP S57134566 A JPS57134566 A JP S57134566A JP 2033481 A JP2033481 A JP 2033481A JP 2033481 A JP2033481 A JP 2033481A JP S57134566 A JPS57134566 A JP S57134566A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- iron
- grain size
- pipe
- iron powder
- 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.)
- Pending
Links
Abstract
PURPOSE: To form a uniform thin anticorrosive iron oxide film with high adhesion on the inside of a condensing pipe by using an acidic soln. contg. iron powder having a small grain size and a water soluble org. solvent.
CONSTITUTION: To an acidic soln. such as about 0.1W2.0N hydrochloric acid is added about 100W5,000g/l iron powder. The grain size of the iron powder is <400mesh, and iron carbonyl powder having about 5μm average grain size is most suitable. It is effective to make the iron powder fine beforehand by blowing air or the like into the acidic soln. contg. the powder. To the soln. is further added 20W70wt% of ≥1 kind of water soluble org. solvent having smaller surface tension than water, e.g., methanol, ethanol or acetone, and the inside of a condensing pipe is coated with the prepared coating liq. Wet air is then blown into the pipe at ordinary temp. or a slightly elevated temp. to form a thin anticorrosive iron oxide film with superior adhesion and uniformity on the inside of the pipe in a short time.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2033481A JPS57134566A (en) | 1981-02-13 | 1981-02-13 | Preventing method for corrosion of inside of condensing pipe made of copper alloy |
US06/256,121 US4369073A (en) | 1980-04-25 | 1981-04-21 | Method for protecting the inner surface of a copper alloy condenser tube from corrosion |
DE8181301837T DE3166557D1 (en) | 1980-04-25 | 1981-04-27 | Method for protecting the inner surface of a copper alloy condenser tube from corrosion and a copper alloy condenser tube protected thereby |
EP81301837A EP0039228B1 (en) | 1980-04-25 | 1981-04-27 | Method for protecting the inner surface of a copper alloy condenser tube from corrosion and a copper alloy condenser tube protected thereby |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2033481A JPS57134566A (en) | 1981-02-13 | 1981-02-13 | Preventing method for corrosion of inside of condensing pipe made of copper alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57134566A true JPS57134566A (en) | 1982-08-19 |
Family
ID=12024231
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2033481A Pending JPS57134566A (en) | 1980-04-25 | 1981-02-13 | Preventing method for corrosion of inside of condensing pipe made of copper alloy |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57134566A (en) |
-
1981
- 1981-02-13 JP JP2033481A patent/JPS57134566A/en active Pending
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