Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 266, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.120937
Keywords
Nickel; Chloride; Weathering steel; Tropical marine atmosphere; Product film
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Funding
- National Key R&D Program of China [2016YFE0203600]
- National Natural Science Foundation of China [51571027]
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The study investigated the effect of chloride ion on the corrosion resistance of Ni-advanced weathering steel in simulated tropical marine atmosphere. The results showed that the concentration of chloride ion had a primary impact on the corrosion resistance of the steel, affecting the formation of NiFe2O4 and the composition of the product film. Increasing chloride ion concentration led to reduced corrosion resistance and changes in the composition and distribution of nickel in the film.
The effect of chloride ion on corrosion resistance of Ni-advanced weathering steel in simulated tropical marine atmosphere was investigated by surface analysis and electrochemical methods. The results showed that the effect of chloride ion on corrosion resistance of steel was primarily related to chloride ion concentration. As the chloride ion concentration increased, the inhibition of chloride ion on the formation of NiFe2O4 was gradually enhanced and the corrosion resistance of steel was reduced. Meanwhile, the main composition phase of inner product film changed from alpha-FeOOH to gamma-FeOOH, whereas that of outer film changed from gamma-FeOOH to beta-FeOOH. Moreover, Ni was mainly concentrated in the inner film instead of being distributed in the whole product film. (C) 2020 Elsevier Ltd. All rights reserved.
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