Study on Seawater Corrosion Resistant Ferrite Matrix High-Ti Steel

doi:10.12068/j.issn.1005-3026.2019.11.009

Abstract

Abstract: Two new types of seawater corrosion resistant steels have been developed， which contain different Ti contents. The ferrite matrix was obtained by rolling- and cooling-controlled processing. The corrosion rate of the tested steel was measured from the experiment of simulated seawater drying-wetting cycles corrosion. The corrosion morphology， composition of corrosion products and element distribution in the cross section were studied by SEM， XRD and electron probe microanalysis (EPMA). The results show that both seawater corrosion resistant steels are covered with uniform and defect-free corrosion products after the test of simulated accelerated seawater corrosion. There are a large number of the continuous Ti-rich areas formed in the inner rust layer， which can hinder the further corrosion and improve the corrosion resistance. Furthermore， the synergistic effect of Ti and P elements in the steels can also increases the ability of corrosion resistance to seawater.

Key words: low carbon high-Ti steel, drying-wetting cycles, micro-morphology, corrosion rate, seawater corrosion resistance

CLC Number:

TG172.5

WENG Lei， WU Hong-yan， LAN Liang-yun， DU Lin-xiu. Study on Seawater Corrosion Resistant Ferrite Matrix High-Ti Steel[J]. Journal of Northeastern University Natural Science, 2019, 40(11): 1568-1573.

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