Investigation of the effects of the magnetic field on the anodic dissolution of alloy 690 in SO42-+ SCN- solution using digital holography

被引：3

作者：

Xu, Dongling ^{[1
]}

Sang, Chen ^{[2
]}

Yuan, Boyu ^{[2
]}

Li, Liang ^{[1
]}

机构：

[1] Jiangsu Normal Univ, Sch Chem & Mat Sci, Jiangsu Key Lab Green Synthet Chem Funct Mat, Xuzhou 221116, Peoples R China

[2] Jiangsu Normal Univ, Sch Phys & Elect Engn, Jiangsu Key Lab Adv Laser Mat & Devices, Xuzhou 221116, Peoples R China

来源：

HELIYON | 2023年 / 9卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Alloy; 690; Magnetic field; Digital holography; Anodic dissolution; SO42-+ SCN-; NICKEL-BASED ALLOYS; CORROSION; BEHAVIOR; SULFATE; COPPER;

D O I：

10.1016/j.heliyon.2023.e13566

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Digital holography has been employed for in situ observation of dynamic processes occurring at the electrode|electrolyte interface during the anodic dissolution of Alloy 690 in solutions con-taining SO42-+ SCN- with or without magnetic field (MF). It was found that MF increased the anodic current of Alloy 690 in 0.5 M Na2SO4 + 5 mM KSCN solution but showed a decreased value when evaluated in 0.5 M H2SO4 + 5 mM KSCN solution. For each solution, as a result of the stirring effect due to Lorentz force, MF showed a decreased localized damage further preventing pitting corrosion. The content of nickel and iron at grain boundaries is higher than that on the grain body, in accordance with the Cr-depletion theory. MF increased the anodic dissolution of nickel and iron, which in turn increased the anodic dissolution at grain boundaries. In situ inline digital holography revealed that IGC begins at one grain boundary and progresses to adjacent grain boundaries with or without MF.

引用

页数：15

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