Hot corrosion behavior of a NiCoCrAlY coating fabricated by laser cladding on 17-4PH stainless steel

被引：8

作者：

Li, Yuxin ^{[1
]}

Yang, Yixin ^{[1
]}

Nie, Jinhao ^{[1
]}

Bai, Peikang ^{[1
]}

Liang, Zhiguo ^{[2
]}

Wei, Shouzheng ^{[1
]}

Cai, Jie ^{[3
,4
]}

Guan, Qingfeng ^{[5
]}

机构：

[1] North Univ China, Sch Mat Sci & Engn, Taiyuan 030051, Peoples R China

[2] Shanxi North Machine Bldg Co Ltd, Taiyuan 030009, Peoples R China

[3] Jiangsu Univ, Inst Adv Mfg & Modern Equipment Technol, Zhenjiang 212013, Jiangsu, Peoples R China

[4] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[5] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China

来源：

ENGINEERING FAILURE ANALYSIS | 2022年 / 133卷

关键词：

Hot corrosion behavior; NiCoCrAlY coating; Laser cladding; Molten salt; Oxide; HIGH-TEMPERATURE CORROSION; OXIDATION BEHAVIOR; MCRALY COATINGS; BASE SUPERALLOY; PREOXIDATION; RESISTANCE;

D O I：

10.1016/j.engfailanal.2021.105962

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

NiCoCrAlY coatings were prepared using laser cladding technology and subjected to a continuous hot corrosion test in a eutectic Na2SO4/NaCl (75:25, wt. %/wt. %) salt at 800 degrees C in air. The corrosion kinetics curves of the NiCoCrAlY coating and the untreated substrate over 100 h of hot corrosion were compared and analyzed. The results show that in the early stage of hot corrosion, a chemical reaction that produces alkaline fusion near the oxide scale takes place at the molten salt/coating interface, causing Al2O3/Cr2O3 to form and dissolve continuously. In the late stage, a new continuous Al2O3 film is formed.

引用

页数：12

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