Wang Bei, Wang Yun, Li Qingping, Li Huixin, Zhang Lei, Lu Minxu
University of Science and Technology Beijing Beijing 100083 China
CNOOC Research Institute Beijing 100028 China.
RSC Adv. 2020 Sep 24;10(58):35302-35309. doi: 10.1039/d0ra04334f. eCollection 2020 Sep 21.
The effect of chromium on the corrosion behavior of low Cr-bearing alloy steel in a wet gas pipeline with a high flow rate was studied using a rotating cylinder electrode (RCE) and self-built wet gas flow loop device. The results show that the addition of chromium in the steel can increase the flow accelerated corrosion (FAC) resistance of steel effectively. It was hard for pure FeCO to deposit onto the carbon steel surface to form an intact corrosion film when the flow rate or wall shear stress was high. However, a mixture of Cr(OH) and FeCO can still be deposited onto the 3Cr steel surface and form an intact and protective corrosion film even under conditions with a 212 Pa wall shear stress in the wet gas pipeline.
采用旋转圆柱电极（RCE）和自行搭建的湿气流动回路装置，研究了铬对高流速湿气管道中低铬合金钢腐蚀行为的影响。结果表明，在钢中添加铬可有效提高钢的流动加速腐蚀（FAC）抗性。当流速或壁面剪应力较高时，纯FeCO很难沉积在碳钢表面形成完整的腐蚀膜。然而，即使在湿气管道壁面剪应力为212 Pa的条件下，Cr(OH)和FeCO的混合物仍可沉积在3Cr钢表面并形成完整的保护性腐蚀膜。
