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Title: The atmospheric corrosion of zinc in the presence of NaCl: The influence of carbon dioxide and temperature

Abstract

The atmospheric corrosion of zinc has been studied at 4, 22, and 38 C. The samples were exposed to synthetic air with careful control of CO{sub 2} concentration, relative humidity, and flow conditions. The relative humidity was 95%, and the concentrations of CO{sub 2} were <1 and 350 ppm, respectively. Sodium chloride was added before the exposures (0, 14, and 70 {micro}g/cm{sup 2}). Mass gain and metal loss results are reported. As expected, NaCl is corrosive toward zinc, giving rise to heavy pitting. In the absence of CO{sub 2}, the corrosion rate of zinc is independent of temperature. In the absence of CO{sub 2}, zincite, ZnO, is the dominant corrosion product, while zinc hydroxy carbonates and simonkolleite, Zn{sub 5}(OH){sub 8}Cl{sub 2}{center_dot}H{sub 2}O, dominate in the presence of CO{sub 2}. A mechanism is presented that explains the observations.

Authors:
; ;
Publication Date:
Research Org.:
Goeteborg Univ. (SE)
OSTI Identifier:
20080574
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 147; Journal Issue: 5; Other Information: PBD: May 2000; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 54 ENVIRONMENTAL SCIENCES; ZINC; PITTING CORROSION; SODIUM CHLORIDES; CARBON DIOXIDE; AIR POLLUTION; TEMPERATURE DEPENDENCE; CORROSION PRODUCTS; CHEMICAL REACTION KINETICS

Citation Formats

Lindstroem, R., Svensson, J.E., and Johansson, L.G. The atmospheric corrosion of zinc in the presence of NaCl: The influence of carbon dioxide and temperature. United States: N. p., 2000. Web. doi:10.1149/1.1393429.
Lindstroem, R., Svensson, J.E., & Johansson, L.G. The atmospheric corrosion of zinc in the presence of NaCl: The influence of carbon dioxide and temperature. United States. doi:10.1149/1.1393429.
Lindstroem, R., Svensson, J.E., and Johansson, L.G. Mon . "The atmospheric corrosion of zinc in the presence of NaCl: The influence of carbon dioxide and temperature". United States. doi:10.1149/1.1393429.
@article{osti_20080574,
title = {The atmospheric corrosion of zinc in the presence of NaCl: The influence of carbon dioxide and temperature},
author = {Lindstroem, R. and Svensson, J.E. and Johansson, L.G.},
abstractNote = {The atmospheric corrosion of zinc has been studied at 4, 22, and 38 C. The samples were exposed to synthetic air with careful control of CO{sub 2} concentration, relative humidity, and flow conditions. The relative humidity was 95%, and the concentrations of CO{sub 2} were <1 and 350 ppm, respectively. Sodium chloride was added before the exposures (0, 14, and 70 {micro}g/cm{sup 2}). Mass gain and metal loss results are reported. As expected, NaCl is corrosive toward zinc, giving rise to heavy pitting. In the absence of CO{sub 2}, the corrosion rate of zinc is independent of temperature. In the absence of CO{sub 2}, zincite, ZnO, is the dominant corrosion product, while zinc hydroxy carbonates and simonkolleite, Zn{sub 5}(OH){sub 8}Cl{sub 2}{center_dot}H{sub 2}O, dominate in the presence of CO{sub 2}. A mechanism is presented that explains the observations.},
doi = {10.1149/1.1393429},
journal = {Journal of the Electrochemical Society},
issn = {0013-4651},
number = 5,
volume = 147,
place = {United States},
year = {2000},
month = {5}
}