盐浴渗氮对P110钢耐硫腐蚀性能的影响  

Effect of salt bath nitriding on sulfur corrosion resistance of P110 steel

作　　者：毛汀 吴贵阳 李珊 曹军 何益杉 闫静 Mao Ting;Wu Guiyang;Li Shan;Cao Jun;He Yishan;Yan Jing(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;National Energy R&D Center of High Sulfur Gas Exploitation,Chengdu,Sichuan,China;High Sulfur Gas Exploitation Pilot Test Center,CNPC,Chengdu,Sichuan,China)

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]国家能源高含硫气藏开采研发中心 [3]中国石油集团公司高含硫气藏开采先导试验基地

出　　处：《石油与天然气化工》2020年第6期76-81,共6页Chemical engineering of oil & gas

基　　金：中国石油天然气股份有限公司“油气地面工程关键技术研究与应用-油气田集输管道内腐蚀完整性评价关键技术研究”(2019D-1613)。

摘　　要：对P110钢在490℃下进行了4 h的盐浴渗氮,通过光学显微镜、X射线衍射仪、扫描电镜研究了渗氮对P110钢组织的影响。利用4种不同的硫腐蚀介质,研究了元素硫对渗氮及未渗氮试样腐蚀行为的影响。结果显示:P110钢经渗氮处理后,渗层组织由表及里依次为氧化物层、化合物层、扩散层,化合物层主要由Fe 2C、Fe 2N和Mn组成;化合物层结构致密,能对钢基体起到良好的保护作用,显著提高了P110钢耐硫腐蚀性能。P110 steel was nitrided in salt bath at 490°C for 4 h.The effect of nitriding on micro-structure of P110 steel was studied by optical microscope,X-ray diffractometer and scanning electron microscope.The influence of elemental sulfur on the corrosion behaviors of nitrided and non-nitrided samples were studied by using four different sulfur corrosion media.The results showed that the structure of percolating layers of P110 steel were oxide layer,compound layer and diffusion layer from the surface to the inside after nitriding treatment,and the compound layer was mainly composed of Fe 2C,Fe 2N and Mn.The compound layer is dense in structure,which can protect the steel substrate well and improve the sulfur corrosion resistance of P110 steel.

关 键 词：P110钢 盐浴渗氮 硫腐蚀 

分 类 号：TE983[石油与天然气工程—石油机械设备]