Published June 2010 | Version v1
Journal article Metadata-only

Study on the Corrosion Inhibition Characteristics of Carbon Steel by Sodium Phosphate and Sodium Nitrite

Creators

  • 1. Green Growth Laboratory, Korea Electric Power Research Institute, Daejeon (Korea, Republic of)

Description

Sodium nitrite is widely used as one of the popular corrosion inhibitors for the protection of ferrous metal in closed cooling water system, such as a diesel engine and a chiller. The optimum treatment conditions are studied through laboratory tests using linear polarization resistance (LPR) technique. Corrosion rate of the carbon steel electrode could be maintained less than 2.5x10-3 mmpy in the test condition of 500 ppm as NO2-, 200 ppm as CT, 70 .deg. C and pH 6.8. The pH control is confirmed not to be an important factor in the protection of carbon steel by sodium nitrite inhibitor. The addition of tolyltriazole was needed for the protection of the copper alloy in the sodium nitrite treatment system

Additional details

Publishing Information

Journal Title
Corrosion Science and Technology
Journal Volume
9
Journal Issue
3
Series
5 refs, 10 figs
Journal Page Range
p. 137-141
ISSN
1598-6462

INIS

Country of Publication
Korea, Republic of
Country of Input or Organization
Korea, Republic of
INIS RN
43125283
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
CARBON STEELS; COOLING; COPPER ALLOYS; CORROSION; POLARIZATION; SAFETY; SODIUM NITRATES; SODIUM PHOSPHATES
Descriptors DEC
ALKALI METAL COMPOUNDS; ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; IRON ALLOYS; IRON BASE ALLOYS; NITRATES; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHATES; PHOSPHORUS COMPOUNDS; SODIUM COMPOUNDS; STEELS; TRANSITION ELEMENT ALLOYS