Failure analysis of float valve in transformation gas separator of coal gasification unit

Yang Zhou; Yong Jiang; Xiaoxiang Weng; Jianming Gong

doi:10.11973/fsyfh-201904012

Failure analysis of float valve in transformation gas separator of coal gasification unit

Yang Zhou, Yong Jiang, Xiaoxiang Weng, Jianming Gong

School of Mechanical and Power Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

Abstract

Corrosion failure of a float valve in transformation gas separator unit occurred after servicing for 7 months. The failure reasons were analyzed by observation of corrosion morphology, analysis of chemical composition, examination of microstructure and analysis of corrosion products. The results show that a large amount of deformation induced martensite occurring in cold machining reduced the corrosion resistance of the float valve greatly. The joint action of activation corrosion caused by H₂S and pitting caused by Br^- made the float valve fail seriously.

Original language	English
Article number	1005-748X(2019)04-0299-04
Pages (from-to)	299-302
Number of pages	4
Journal	Corrosion and Protection
Volume	40
Issue number	4
DOIs	https://doi.org/10.11973/fsyfh-201904012
State	Published - Apr 2019

Keywords

Br
Coal gasification
Deformation induced martensite
Float valve
HS

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10.11973/fsyfh-201904012

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abstract = "Corrosion failure of a float valve in transformation gas separator unit occurred after servicing for 7 months. The failure reasons were analyzed by observation of corrosion morphology, analysis of chemical composition, examination of microstructure and analysis of corrosion products. The results show that a large amount of deformation induced martensite occurring in cold machining reduced the corrosion resistance of the float valve greatly. The joint action of activation corrosion caused by H2S and pitting caused by Br- made the float valve fail seriously.",

keywords = "Br, Coal gasification, Deformation induced martensite, Float valve, HS",

author = "Yang Zhou and Yong Jiang and Xiaoxiang Weng and Jianming Gong",

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AU - Zhou, Yang

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AU - Weng, Xiaoxiang

AU - Gong, Jianming

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Y1 - 2019/4

N2 - Corrosion failure of a float valve in transformation gas separator unit occurred after servicing for 7 months. The failure reasons were analyzed by observation of corrosion morphology, analysis of chemical composition, examination of microstructure and analysis of corrosion products. The results show that a large amount of deformation induced martensite occurring in cold machining reduced the corrosion resistance of the float valve greatly. The joint action of activation corrosion caused by H2S and pitting caused by Br- made the float valve fail seriously.

AB - Corrosion failure of a float valve in transformation gas separator unit occurred after servicing for 7 months. The failure reasons were analyzed by observation of corrosion morphology, analysis of chemical composition, examination of microstructure and analysis of corrosion products. The results show that a large amount of deformation induced martensite occurring in cold machining reduced the corrosion resistance of the float valve greatly. The joint action of activation corrosion caused by H2S and pitting caused by Br- made the float valve fail seriously.

KW - Br

KW - Coal gasification

KW - Deformation induced martensite

KW - Float valve

KW - HS

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DO - 10.11973/fsyfh-201904012

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M1 - 1005-748X(2019)04-0299-04

ER -

Failure analysis of float valve in transformation gas separator of coal gasification unit

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Keywords

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