Comprehensive analysis of corrosion failure of blast furnace gas pipeline in a steel plant

被引：14
|
作者：
Chen, Tianqi [1 ,2 ]
Sun, Liang [1 ,2 ]
Li, Qing [1 ,2 ]
Liu, Chao [1 ,2 ]
Liu, Zhiyong [1 ,2 ,3 ]
Cheng, Xuequn [1 ,2 ]
Li, Xiaogang [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Key Lab Corros & Protect, Minist Educ, Beijing, Peoples R China
[2] Univ Sci & Technol Beijing, Natl Mat Corros & Protect Data Ctr, Beijing, Peoples R China
[3] Hebei Special Equipment Supervis & Inspect Inst, Key Lab Safety Evaluat Steel Pipes & Fittings Stat, Shijiazhuang 050061, Hebei, Peoples R China
来源：
ENGINEERING FAILURE ANALYSIS | 2023年 / 154卷
基金：
中国国家自然科学基金;
关键词：
Corrosion failure; Carbon steel; Blast furnace gas; Pitting corrosion; STAINLESS-STEEL; RUST PARTICLES; BEHAVIOR; FEOOH; ZONE;
D O I：
10.1016/j.engfailanal.2023.107651
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The corrosion failure of blast furnace gas pipeline made of Q235 carbon steel in a steel plant was investigated. Macro and micro morphology, thickness loss rate and phase composition of rust layer have been comprehensively studied. The macro and micro morphology of failed tube in service for 3.5 years were observed by laser scanning confocal microscope (LSCM), scanning electron microscope (SEM) and energy disperse spectroscopy (EDS), and chemical composition of on-site condensed water and materials was examined. Results indicated that Cl is enriched on the surface of loose corrosion products, which is composed of FeOOH and Fe2O3. Large thickness loss rate and corrosion gully or holes suggest that mechanism of pitting corrosion are acid chemical corrosion and electrochemical corrosion.
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页数：13
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