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 solution

Info

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
Application number
JP8048081A
Other languages
Japanese (ja)
Inventor
Saburou Watanabe
Hiroyuki Inoi
Shuji Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Denko KK filed Critical Showa Denko KK
Priority to JP8048081A priority Critical patent/JPS57196721A/en
Publication of JPS57196721A publication Critical patent/JPS57196721A/en
Pending legal-status Critical Current

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
JP8048081A 1981-05-27 1981-05-27 Preventing method for corrosion of heat exchanger for heating aqueous salt solution Pending JPS57196721A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
KR830009272A (en) Surface removal method in electrolyte without acid using high current density
JPS57196721A (en) Preventing method for corrosion of heat exchanger for heating aqueous salt solution
JPS529963A (en) Method for removing arsenic and silicic acid contained in aqueous solu tion simultaneously
JPS5311343A (en) Heat accumulator tank
JPS5724634A (en) Deoxydizer composition
JPS54124009A (en) Suppression of heat browning of phospholipids
JPS52138489A (en) Treatment of cation exchanger
JPS5315277A (en) Applying method for polymer flocculating-dehydrating agent
JPS5249A (en) Temperature stratified heat storage tank
JPS55165944A (en) Curative solution for resol type phenol resin for hot box
JPS5331586A (en) Activation treating method for selective ion exchanger
JPS5294880A (en) Antifreezing solution composition
JPS5242470A (en) Method of treating waste containing heavy metal salts and making them insoluble
JPS5747881A (en) Preventing method for corrosion of copper or copper alloy pipe for hot water supply
Masui et al. Effects of Phosphorus Content and Heat Induced Structural Changes in Electrodeposited Nickel--Phosphorus Alloys on[Their] Resistance to Acid Corrosion
JPS57200221A (en) Method for preventing hydrolysis of tin salt in acidic solution of tin salt
JPS53147200A (en) Treating method of radioactive waste liquid
SU1093354A1 (en) Method of preparing fatty acid reagent for ore flotation
JPS55100896A (en) Flux for soldering
JPS5250A (en) Temperature stratified heat storage tank
JPS57101697A (en) Passivation of steel
JPS56131695A (en) Agent which is corrosion-resistant and inhibits lowering of boiling point
JPS5336534A (en) Electrolytic coating
JPS5696061A (en) Cobalt-nickel alloy magnetic thin film
JPS5289799A (en) Treating method of radioactive waste liquid