Investigation of the Corrosion and Passive Behavior of HP-13Cr Stainless Steel in Formate Annulus Protection Fluid  

作　　者：Jidong Wang Tengfei Yin Wenlong Qi Xuanpeng Li Yang Zhao Tao Zhang Fuhui Wang 

机构地区：[1]Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang,110819,China [2]State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials,Tubular Goods Research Institute,CNPC,Xi’an,710077,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2024年第6期1087-1103,共17页金属学报（英文版）

基　　金：supported by the Youth Program of the National Natural Science Foundation of China(No.52001061);the Young Elite Scientist Sponsorship Program Cast(No.YESS20200139);the Fundamental Research Funds for the Central Universities(No.N2202016).

摘　　要：The corrosion and passive behavior of HP-13Cr stainless steel(HP-13Cr SS)in formate annulus protection fluid was investigated.HP-13Cr SS exhibited good passive behavior in clean formate annulus protection fluid,which was attributed to a thinner and more dense passive film mainly composed of Cr_(2)O_(3).In the formation water solution,the passive film was composed of metastable Cr(OH)3,which was explained by the isoelectric point theory,resulting in the deterioration of the passive behavior of HP-13Cr SS.When the formation water penetrated the formate annulus protection fluid,a large number of loose FeCO_(3)particles formed in the corrosion scales,thus HP-13Cr SS suffered severe corrosion.Therefore,avoiding formation water penetrating the formate annulus protection fluid is conducive to improving the service life of HP-13Cr SS oil tubes in extremely aggressive environment.

关 键 词：HP-13Cr SS Passive behavior Formate annulus protection fluid Isoelectric point 

分 类 号：TG172.3[金属学及工艺—金属表面处理]