期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 22, 期 3, 页码 815-822出版社
SPRINGER
DOI: 10.1007/s11665-012-0335-8
关键词
corrosion; SKP; ultrahigh strength stainless steel
资金
- Fundamental Research Funds for the Central Universities [FRF-TP-11-006B]
- National Natural Science Foundation of China [51171023]
Electrochemical behavior of ultrahigh strength (UHS) steel (1#) after salt spray test (SST) was studied by means of electrochemical techniques and scanning Kelvin probe, Raman spectroscopy, and scanning electron microscope. The results show that pitting occurs to the samples of 1# steel in SST with 5% NaCl. The corrosion products are mainly gamma-FeOOH and oxide/hydroxide of chromium. Within 4 days, corrosion reaction is resisted by the completed corrosion products, and thereafter corrosion rate of 1# steel with corrosion products is accelerated as the SST continues, since the corrosion potential shifts to negative direction and corrosion current density becomes larger. Kelvin potentials of 1# steel after the SST are 0.3-0.4 V higher in magnitude and distributes more unevenly than that before the SST, because the oxide films grow thicker and affect the anodic reaction of corrosion process.
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