JPS57196721A - Preventing method for corrosion of heat exchanger for heating aqueous salt solution - Google Patents
Preventing method for corrosion of heat exchanger for heating aqueous salt solutionInfo
- Publication number
- JPS57196721A JPS57196721A JP8048081A JP8048081A JPS57196721A JP S57196721 A JPS57196721 A JP S57196721A JP 8048081 A JP8048081 A JP 8048081A JP 8048081 A JP8048081 A JP 8048081A JP S57196721 A JPS57196721 A JP S57196721A
- Authority
- JP
- Japan
- Prior art keywords
- corrosion
- reducing agent
- heat exchanger
- soln
- salt 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.)
- Pending
Links
Abstract
PURPOSE: To improve the corrosion resistance of a heat exchanger and to enable the use of an inexpensive SS material as a material of the exchanger by charging an aqueous NaCl soln. into an electrolytic cell after adding a reducing agent and by heating the soln. through the heat exchanger.
CONSTITUTION: In a heating method for an aqueous NaCl soln. charged into an electrolytic cell through a heat exchanger, to the soln. to be heated is added a reducing agent beforehand. The preferably used reducing agent includes Na2SO3. By adding a very small amount of CoCl2.6H2O as a reduction accelerator together with Na2SO3 as the reducing agent, the corrosion of the exchanger is preventd almost thoroughly. The reason why the corrosion is inhibited by adding the reducing agent is estimated to be that a trace of O2 dissolved in the soln. takes part in the corrosion and the dissolved O2 is removed by adding the reducing agent or further adding the reduction accelerator.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8048081A JPS57196721A (en) | 1981-05-27 | 1981-05-27 | Preventing method for corrosion of heat exchanger for heating aqueous salt solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8048081A JPS57196721A (en) | 1981-05-27 | 1981-05-27 | Preventing method for corrosion of heat exchanger for heating aqueous salt solution |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57196721A true JPS57196721A (en) | 1982-12-02 |
Family
ID=13719432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8048081A Pending JPS57196721A (en) | 1981-05-27 | 1981-05-27 | Preventing method for corrosion of heat exchanger for heating aqueous salt solution |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57196721A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102718299A (en) * | 2012-07-09 | 2012-10-10 | 青岛理工大学 | Preparation method of coagulation phosphorus removal agent |
-
1981
- 1981-05-27 JP JP8048081A patent/JPS57196721A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102718299A (en) * | 2012-07-09 | 2012-10-10 | 青岛理工大学 | Preparation method of coagulation phosphorus removal agent |
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