Corrosion behaviour of {Q235B} carbon steel in sediment water from crude oil
By Cheng, Qingli; Tao, Bin; Song, Liying; Zhang, Weihua; Liu, Xiuyun; Li, Weihua; Hou, Baorong; Liu, Quanzhen
Published in Corrosion Science
NULL
2016
Abstract
Abstract The effects of sediment water from crude oil on {Q235B} carbon steel corrosion were investigated through electrochemical measurements, surface characterization, mass loss, and mass gain techniques for 11 weeks of immersion. Results showed that the steel surfaces were covered by scale deposits consisting mainly of CaCO3. Corrosion pits were initiated under the scale deposits. Moreover, a galvanic corrosion cell was generated under the scale deposits, resulting in localized dissolution. However, the scale deposits blocked the transport of corrosion products into the bulk solution, thereby causing the accumulation of corrosion products under the scale deposits.
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