海上环境Q345R钢保温层下腐蚀成因分析及改进对策  

Cause analysis and improvement measures of corrosion under insulation of Q345R steel in marine environment

作　　者：肖玉龙 邓肇福 郭小强 白民宇 李燕姣 胡言峰 XIAO Yulong;DENG Zhaofu;GUO Xiaoqiang;BAI Minyu;LI Yanjiao;HU Yanfeng(Southwest Supervision Station of Petrochemical Engineering Quality Supervision Station,Chongqing 401122,China;College of Chemical Engineering,Northwest University,Xi’an 710069,China;Institute of Gathering and Transportation Engineering Technology,CNPC Southwest Oil&Gas Field Company,Chengdu 610041,China;Xi’an Chishine Optoelectronics Technology Co.,Ltd.,Xi’an 710075,China;Machinery Industry Shanghai Lanya Petrochemical Equipment Testing Co.,Ltd.,Shanghai 201613,China;Sichuan Lineng Gas Engineering Design Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]石油化工工程质量监督总站西南监督站,重庆401122 [2]西北大学化工学院,陕西西安710069 [3]中国石油西南油气田分公司集输工程技术研究所,四川成都610041 [4]西安知象光电科技有限公司,陕西西安710075 [5]机械工业上海蓝亚石化设备检测所有限公司,上海201613 [6]四川利能燃气工程设计有限公司,四川成都610041

出　　处：《石油化工腐蚀与防护》2024年第6期60-64,共5页Corrosion & Protection In Petrochemical Industry

摘　　要：在海上环境中服役的工程设备的材料腐蚀问题是海洋石油采集与运输中面临的巨大挑战之一。当前针对保温层的研究一般只关注保温层材料的选择与保温效果,很少关注保温层内部渗水给海上设备带来的腐蚀问题。该文针对海上工程设备三相分离器保温层下的腐蚀进行研究,对样品进行了化学成分分析、金相组织分析、扫描电镜观察和能谱分析,发现保温层下的腐蚀属于电化学腐蚀,水和无机盐是腐蚀的主要影响因素,保温层下的水主要来源于渗透水和冷凝水,无机盐主要来自于海上盐雾环境和设备中保温层所使用的材料,并且针对三相分离器保温层下的腐蚀现象提出多条合理有效的改进建议。Corrosion of engineering equipment in the marine environment is one of the great challenges faced in offshore oil production and transportation.Currently,research on insulation layers generally only focuses on the selection of insulation materials and the effect of insulation,with little attention paid to the corrosion problems caused by water seepage inside the insulation layer.In this paper,corrosion under insulation of the three-phase separator of offshore engineering equipment was studied.Chemical composition analysis,metallographic structure examination,scanning electron microscope observation and energy spectrum evaluation were carried out on the samples.It was found that the corrosion under insulation belonged to electrochemical corrosion.Water and inorganic salts were the main influencing factors of corrosion.The water under the insulation layer mainly came from infiltration water and condensed water,while the inorganic salts mainly came from the marine salt-spray environment and the materials used in the insulation layer of the equipment.Furthermore,several reasonable and effective suggestions were proposed for the corrosion under insulation of the three-phase separator.

关 键 词：保温层 腐蚀 分离器 海洋 集输 

分 类 号：TE985[石油与天然气工程—石油机械设备]