臨氫超臨界水中鎳基合金的腐蝕機理研究
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關鍵詞：臨氫環(huán)境；超臨界水；鎳基合金；腐蝕機理
中圖分類號：TB37文獻標志碼：A
DOI：10.7652/xjtuxb202507018 文章編號：0253-987X（2025）07-0182-11
Study on the Corrosion Mechanisms of Nickel-Based Alloys in Hydrogen-Containing Supercritical Water
WANG Hao1，WANG Danqing1'2，XI Kenan1，3，LU Youjun1 （1.State KeyLaboratoryof MultiphaseFlowinPower Engineering，Xi'an Jiaotong University，Xi'an71o049，China; 2.BYDAutomotive Limited Company，Xi'an，71o119，China；3.Northwest Institute of Nuclear Technology，Xi'an，710024，China）
Abstract： To address the corrosion issues of nickel-based alloys in a hydrogen-containing supercritical water environment，this study explores the corrosion processes of Inconel 60o and Inconel 625 alloys through systematic experimentation，revealing their corrosion mechanisms. A systematic comparison is made of the corrosion processes of the two allys under different temperatures （575，600 ，and 625°C ），different hydrogen partial pressures（1，2，and 3MPa ）， and different corrosion durations（72，120，and 168h ）. The corrosion mass gain patterns， surface elemental valence state distributions （XPS），and surface morphology characteristics （SEM） of the experimental samples are analyzed. The experimental results indicate that Inconel
625 alloy shows changes in mass after 120h and 168h of corrosion;both Inconel 6oo and Inconel 625 alloys，due to their lower Fe/Ni ratio and approximately 20% （204號 Cr content，easily form dense Fe-Cr and Ni-Cr spinel oxide structures， which provide good protection against corrosion，thus exhibiting excellent hydrogen corrosion resistance;when a certain amount of Cr （ 20% by mass） is present，a higher Fe/Ni ratio facilitates the formation of stable FexCr（3-x）O4 and FemNi（3-m）O4 ， which exhibit better hydrogen embrittlement resistance； among the two materials， Inconel 625 has superior hydrogen corrosion resistance compared to Inconel 6Oo. The findings provide support for material selection in containers used in hydrogen-containing supercritical water environments.
Keywords： hydrogen-containing environment； supercritical water； Ni-based aloy; corrosionmechanism
超臨界水氣化（SCWG）制氫技術，是利用超臨界水的獨特理化性質，在超臨界水環(huán)境下對有機物進行低溫催化、氣化反應，生成氫氣和二氧化碳。（剩余14980字）