Effect of Ferrous Ion on the Corrosion Behaviour of 410 Stainless Steel in Wet H₂S Environment

Abstract:

In this paper, the effect of ferrous ion on the corrosion behavior of 410 martensitic stainless (410SS) steel was investigated by corrosion tests, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The corrosion tests were conducted in brine solution saturated with H₂S and two type of iron compounds (FeS and FeSO₄). The reults revealed that there exists apparent difference between piting resistence of FeSO₄ and FeS addition for 410SS. The corrosion rates of specimens in FeSO₄ solution was much higher than that of FeS, and the corrosion rate reached a maximum of 1.299 mm/year when the concentration was about 0.15 mol/L. The SEM results showed that without FeS (indissolvable) and FeSO₄, steel suffered slight corrosion, meanwhile several pittings appeared after 42 h. Compared with that of FeS, much more pittings grew on the specimens with FeSO₄. The corrosion product was mainly mackinawite.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 1016-1021
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.1016
• Online since: March 2016
• Authors: Jie Zhou, Peng Peng Bai, Tian Qi Wang, Shu Qi Zheng*
• Keywords: Corrosion, H₂S, Martensitic Stainless Steel

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