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FANG Jianbo, XUE Yan, MA Youlong, LUO Sheji, ZHOU Shili, ZHAO Guoxian, SONG Yang. Analysis of Corrosion Reasons of 825 Nickel-Based Alloy Hydraulic Control Pipe in a Thermal Recovery Well[J]. Corrosion & Protection, 2020, 41(8): 65-69. DOI: 10.11973/fsyfh-202008013
Citation: FANG Jianbo, XUE Yan, MA Youlong, LUO Sheji, ZHOU Shili, ZHAO Guoxian, SONG Yang. Analysis of Corrosion Reasons of 825 Nickel-Based Alloy Hydraulic Control Pipe in a Thermal Recovery Well[J]. Corrosion & Protection, 2020, 41(8): 65-69. DOI: 10.11973/fsyfh-202008013

Analysis of Corrosion Reasons of 825 Nickel-Based Alloy Hydraulic Control Pipe in a Thermal Recovery Well

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  • Received Date: December 12, 2018
  • An 825 nickel-based alloy hydraulic control pipe of a thermal recovery well experienced corrosion failure after 3 months of operation. The corrosion reasons and mechanism of the failed pipe were studied by analyzing the chemical composition, mechanical properties and microstructure of the pipe and the morphology and composition of the corrosion products. The results show that the outer wall of the 825 nickel-based alloy hydraulic control pipe suffered severe pitting, the corrosion failure was caused by oxygen corrosion and sulfur corrosion, and sulfur was generated by the reaction of downhole H2S with O2 in steam injection.
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    蔡晓文,戈磊,于浩波,等. 镍基合金825在元素硫环境中的局部腐蚀特征[J]. 材料科学与工程学报,2010,28(2):227-250.

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