Journal
CORROSION SCIENCE
Volume 102, Issue -, Pages 455-468Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2015.10.038
Keywords
Steel; SEM; Electrochemical calculation; Anodic films
Funding
- National Natural Science Foundation of China [51271099]
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The corrosion products and electrochemical corrosion behavior of X80 pipeline steel in saline solution with saturated H2S at 50 degrees C were evaluated. The results showed that mackinawite and cubic FeS were the primary and secondary crystalline phases observed and that a series of changes in the size, shape, thickness, and chemical composition occurred as the immersion stages developed. Electrochemical results showed that the sulfide film hindered pitting and enhanced the corrosion resistance definitely. Zero-resistance ammeter measurements showed that the sulfide film repaired itself when local failure occurred. (C) 2015 Elsevier Ltd. All rights reserved.
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