Failure analysis of the water-wall tube in KIVCET waste heat boiler

被引：5

作者：

Li, Jiadong ^{[1
]}

Zhou, Ping ^{[1
]}

Yu, Gang ^{[2
]}

Yan, Hongjie ^{[1
]}

Chen, Zhuo ^{[1
]}

Song, Guomeng ^{[1
]}

Liao, Zhou ^{[3
]}

机构：

[1] Cent South Univ, Sch Energy Sci & Engn, Changsha 410083, Peoples R China

[2] Shenzhen Zhongjin Lingnan Nonferrous Met Co Ltd, Shenzhen 518000, Peoples R China

[3] Zhuzhou Smelter Grp Co Ltd, Zhuzhou 412004, Peoples R China

来源：

ENGINEERING FAILURE ANALYSIS | 2021年 / 121卷

基金：

中国国家自然科学基金;

关键词：

KIVCET furnace; Waste heat boiler; Water-wall tube; High temperature corrosion; Caustic corrosion; HIGH-TEMPERATURE CORROSION; STRESS-ASSISTED CORROSION; CAUSTIC CORROSION; ROOT CAUSE; BEHAVIOR; DEFECTS; STEELS;

D O I：

10.1016/j.engfailanal.2020.105155

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The corrosion mechanism of the water-wall tube in KIVCET waste heat boiler was investigated. A short length of water-wall tube with a 'fish-mouth' crevasse was obtained from the boiler, and tested by visual inspection, microstructural examination, and SEM/EDS analysis. The results showed that high temperature sulfide corrosion on the fireside of the tube was attributed to the formation of H2S and free S; while on the waterside, inappropriate caustic treatment led to the caustic corrosion. Hydrogen attack observed on both sides of the failed tube should be responsible for the formation of cracking and decarburization. The root cause of the tube failure was the localized wall thinning on the fireside where high temperature corrosion occurred.

引用

页数：12

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