摘要
模拟庆深汽田井下的腐蚀环境，通过静态高温高压釜进行了Ni-Fe-P镀层与25．6Mo不锈钢高温高压CO2腐蚀实验，采用SEM、EDS和XRD测试手段，对Ni-Fe-P镀层及25．6Mo不锈钢进行分析。结果显示，在25MPa、60～120℃温度下，Ni-Fe-P镀层较25．6Mo不锈钢有更好的耐蚀能力，在25MPa、150℃时，Ni-Fe-P镀层有较25．6Mo不锈钢高的腐蚀速率；从SEM可知，在此腐蚀条件下25．6Mo不锈钢的腐蚀产物膜表面腐蚀较浅且分布均匀，属均匀腐蚀，而Ni-Fe-P镀层腐蚀后表面出现局部腐蚀，并分析了Ni-Fe-P镀层高抗CO2腐蚀机理。
The environment of CO2 corrosion in oilfield was simulated, the high temperature and pressure corrosion experiment of electroless Ni-Fe-P plating and 25-6Mo stainless steel were carried out in the static high temperature and pressure kettle. The surface of the electroless Ni-Fe-P plating and 25-6Mo stainless steel was analyzed by SEM, EDS and XRD. The results show that the electroless Ni-Fe-P plating has better corrosion resistance than 25-6Mo stainless steel under the condition of 25MPa, 60 ～120℃. While electroless Ni-Fe-P plating has higher corrosion rate than 25-6Mo stainless steel under the condition of 25 MPa, 150℃. The SEM analysis result shows that, under the CO2 corrosion condition of 25 MPa, 150℃, 96 h, 25-6Mo stainless steel is general corrosion, the electroless Ni-Fe-P plating is localized corrosion. The anti-corrosion mechanism of the electroless Ni-Fe-P plating was analyzed.
出处
《热加工工艺》
CSCD
北大核心
2009年第6期103-106,共4页
Hot Working Technology
基金
油气藏地质及开发工程国家重点实验室(西南石油大学)资助项目(PLN0609)
