期刊
CORROSION SCIENCE
卷 98, 期 -, 页码 318-326出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.05.027
关键词
stainless steel; Biofuel; Gasoline; Ethanol-containing fuel; pitting corrosion
Corrosion of stainless steel DIN 1.4035 (Fe-13%Cr) was studied in ethanol-containing gasoline mixtures as a function of H2O, chloride and acetic acid concentrations. H2O and Cl- are primary corrosion triggering factors in EtOH/gasoline mixtures. The critical water content depends on the EtOH/gasoline-ratio. Pitting corrosion occurred in EtOH/gasoline blends at extremely low chloride-concentrations, which did not lead to passivity breakdown in a purely aqueous solution. An increasing chloride-concentration accelerates pit propagation, with little influence on pit densities. On the other hand, higher concentrations of acetic acid lead to a larger attacked area, with minor influence on the pit propagation in depth. (C) 2015 Elsevier Ltd. All rights reserved.
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