Synergistic effect of different Zn salts with sodium octanoate on the corrosion inhibition of carbon steel in cooling water
- 1. Metallurgy Department, Atomic Energy Authority, Cairo (Egypt)
Description
The corrosion inhibition of carbon steel was investigated in cooling water containing sodium octanoate (Oct), Zn-salts or blends of Oct-Zn salts. The weight loss and the potentiodynamic polarization methods were applied. ZnCl2, ZnSO4 and Zn (NO3)2 were studied. The results showed that Oct-Zn salt blends exhibited higher corrosion inhibition efficiency than either Oct or Zn Salts added separately to the cooling water suggesting a synergistic interaction between Oct and the Zn-salts. The polarization results revealed that these blends act as mixed-type inhibitors with three dominant anodic inhibition. The inhibition efficiency of Zn-salts in the absence and presence of Oct was found to decrease in the order Zn (NO3)2 > ZnSO4 > ZnCl2. Optical microscopy and infrared spectroscopy were used to study the protective action of the films formed on carbon steel in Oct-Zn salt blends. The role of Zn anions and the synergism behavior were discussed
Additional details
Publishing Information
- Journal Title
- Journal of Radiation Research and Applied Sciences
- Journal Volume
- 13
- Journal Issue
- 1
- Journal Page Range
- p. 276-287
- ISSN
- 1687-8507
INIS
- Country of Publication
- Egypt
- Country of Input or Organization
- Egypt
- INIS RN
- 52100947
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CARBON STEELS; CORROSION; OPTICAL MICROSCOPY; POLARIZATION; SYNERGISM; ZINC CHLORIDES; ZINC NITRATES; ZINC SULFATES
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; CHLORIDES; CHLORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; IRON ALLOYS; IRON BASE ALLOYS; MICROSCOPY; NITRATES; NITROGEN COMPOUNDS; OXYGEN COMPOUNDS; STEELS; SULFATES; SULFUR COMPOUNDS; TRANSITION ELEMENT ALLOYS; ZINC COMPOUNDS; ZINC HALIDES