Corrosion behavior of low alloy steel used for new pipeline exposed to H2S-saturated solution
Corrosion behavior of low alloy steel used for new pipeline exposed to H2S-saturated solution
复制标题
DOI：
10.1016/j.ijhydene.2022.07.203
复制
发表时间：
2022-09-29
影响因子：
7.2
通讯作者：
Liu, Chuan
中科院分区：
文献类型：
--
作者：
Liu, Zhenguang;Wang, Yiming;Liu, Chuan
本文通过浸泡实验，从微观形貌、腐蚀动力学、表面形貌、截面形貌、晶体特征和元素分布等方面系统研究了低合金钢在饱和H2S溶液中的腐蚀行为。实验结果表明，随着腐蚀时间的延长，腐蚀速率逐渐降低。钢在腐蚀液中浸泡后立即形成腐蚀产物，组织和厚度变得致密和增厚，提高了钢的耐蚀性。腐蚀产物由镁钠石、英石和辉钼矿转变为镁钠石、英石、磁黄铁矿和辉钼矿。对于合金元素，Cr和Mo倾向于积累在腐蚀产物中相比，钢基体。根据实验结果提出了腐蚀过程的模型。(c)2022年氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
In this paper, the corrosion behavior of low alloy steel in H2S-saturated solution is sys-tematically studied through immersion experiment in terms of microstructure morphology, corrosion kinetics, surface morphology, cross-sectional morphology, crystal characteristic and elemental distribution. The experimental results suggest that the corrosion rate decreased gradually with corrosion time. The corrosion products were immediately formed after the steel was immersed in corrosion solution and the structure and thickness became denser and thicker, which improved corrosion resistance. The corrosion products transformed from mackinawite, greigite and molybdenite to mack-inawite, greigite, pyrrhotite and molybdenite. For the alloying elements, Cr and Mo tended to be accumulated in corrosion products compared with the steel substrate. A schematic model of corrosion process was proposed according to experimental results.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.