Journal
CORROSION SCIENCE
Volume 207, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2022.110563
Keywords
Corrosion; Passive film; Structural characteristics; Failure mechanism; Chloride invasion pathway; short growth time; the thickness be captured in the SEM image; applied an external electric the passive film after applying tential-0; 1 V for 10 min; film increases significantly; This indicates that the protection further designed and improved practical engineering; 6; Conclusion TEM; SECM; XRD and first characterize the nanostructure passive film formed on HRB400 concrete environment); The 1; A large continuous multilayer passive film; which can layers in the growth process; 2; There is a complex multi inner passive film and the into different layers in the multilayer and continuous difference of surface potential 3; The short-term existence formation of passive film
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This paper explores the fine structure and growth mode of passive film on an atomic scale, and identifies ion channels in the inner passive film, which explains the occurrence of defect zones and the concentrated attack of chloride ions in corrosion. This study aids in judging the initiation of corrosion from the perspective of micro damage of passive film.
Passive film is a natural barrier against corrosion, which forms spontaneously in alkaline solution. But as a key problem for corrosion resistance, the growth and failure process of passive film has not been clearly confirmed. In this paper, the fine structure of passive film is explored on the atomic scale, and the growth mode of crystals is demonstrated; ion channels are found in inner passive film, which explains the appearance of defect zones and concentrated attack of chloride ions in corrosion. This study will help to judge the corrosion initiation from the perspective of micro damage of passive film.
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