Corrosion Behavior of Pre-oxidized GH4169 Alloy with Solid NaCI Deposited in a Wet Oxygen Flow at 600 ℃  

作　　者：Weidong Zhang Yu Cui Li Liu Wenquan Wang Wenzheng Chen Rui Li Fuhui Wang 

机构地区：[1]Shenyang National Laboratory for Materials Science,Northeastern University,Shenyang,110819,China [2]Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang,110016,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2024年第7期1249-1264,共16页金属学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.U22A20111).

摘　　要：The corrosion behavior of the pre-oxidized GH4169 alloy was studied after 20 h of exposure under a solid NaCl deposit film in a wet O_(2) environment at 600℃ by mass-gain measurements,X-ray diffraction,scanning electron microscopy,transmission electron microscopy methods.The results indicate that the pre-oxidized GH4169 alloy undergoes serious corrosion in the corrosive condition.The preformed Cr_(2)O_(3) layer is gradually destroyed by deposit NaCl,and the inner Nb2O5 layer beneath the complete outer Cr_(2)O_(3) layer also reacts with NaCl to form NaNbO_(3).The electrochemical test results testified the existence of electrochemical reactions during this corrosion process.The corrosion behavior of pre-oxidized GH4169 under a solid NaCl deposit film in a wet O_(2) environment at 600℃has been discussed in detail.

关 键 词：PRE-OXIDATION Solid NaCl Wet O2 Electrochemical corrosion 

分 类 号：TG172[金属学及工艺—金属表面处理]