Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

The Pitting Behavior of Austenitic and Duplex Stainless Steels Under SO2 Environments with Cl- And F

Picture for The Pitting Behavior of Austenitic and Duplex Stainless Steels Under SO2 Environments with Cl- And F-
Available for download

Cyclic polarization measurements were used to illustrate the corrosion and passive behavior of the stainless steels under the tail gas conditions. Electrochemical behavior of stainless steels in SO2-saturated solutions with various concentrations of Cl- and F- was also studied.

Product Number: 51317--9241-SG
ISBN: 9241 2017 CP
Author: Zhu Wang
Publication Date: 2017
Industry: Materials Selection and Design
$0.00
$20.00
$20.00

With increasing concerns of air pollution the gaseous emission of sulfur from industries in the forms of SOx has been closely monitored and regulated by many countries to meet the requirement of at least 99.8% sulfur recovery. Technological and industrial efforts have been put up in the past several decades and many clean-up processes have been developed in which sulfur containing tail gases are typically contacted with absorbing solvent(s) to remove SO2 from power plants and refineries. However corrosion especially pitting and stress corrosion cracking risks has been reported previously under the condition with both SO2 and Cl- / F- contamination in the solvent. In this paper pitting risk of the austenitic stainless steels and duplex stainless steels under wet SO2 environments with Cl- and F- under high temperature and high pressure was investigated. Corrosion behavior of stainless steels was tested under SO2-saturated solutions with various concentration of Cl- and F- at 60 oC and 125oC by 30 days immersion using autoclave as well as high temperature and high pressure electrochemical measurements. Scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) were also used to characterize the surface of stainless steels after corrosion. The pits were observed on the surface after the simulation tests. Surface analysis also showed that there was a high content of S element in the surface layer in which the main corrosion products FeSO4 were found. Cyclic polarization measurements were used to illustrate the corrosion and passive behavior of the stainless steels under the tail gas conditions. The service boundaries of Cl- and F- content for different types of stainless steels were established.

Key words: SO2, Stainless steel, Pitting, F-, Polarization curve

With increasing concerns of air pollution the gaseous emission of sulfur from industries in the forms of SOx has been closely monitored and regulated by many countries to meet the requirement of at least 99.8% sulfur recovery. Technological and industrial efforts have been put up in the past several decades and many clean-up processes have been developed in which sulfur containing tail gases are typically contacted with absorbing solvent(s) to remove SO2 from power plants and refineries. However corrosion especially pitting and stress corrosion cracking risks has been reported previously under the condition with both SO2 and Cl- / F- contamination in the solvent. In this paper pitting risk of the austenitic stainless steels and duplex stainless steels under wet SO2 environments with Cl- and F- under high temperature and high pressure was investigated. Corrosion behavior of stainless steels was tested under SO2-saturated solutions with various concentration of Cl- and F- at 60 oC and 125oC by 30 days immersion using autoclave as well as high temperature and high pressure electrochemical measurements. Scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) were also used to characterize the surface of stainless steels after corrosion. The pits were observed on the surface after the simulation tests. Surface analysis also showed that there was a high content of S element in the surface layer in which the main corrosion products FeSO4 were found. Cyclic polarization measurements were used to illustrate the corrosion and passive behavior of the stainless steels under the tail gas conditions. The service boundaries of Cl- and F- content for different types of stainless steels were established.

Key words: SO2, Stainless steel, Pitting, F-, Polarization curve

Product tags
Also Purchased
Picture for Uniform and Localized Corrosion Study of Base Material and Welds of Ni-Cr-Mo (W) Alloys
Available for download

Uniform and Localized Corrosion Study of Base Material and Welds of Ni-Cr-Mo (W) Alloys

Product Number: 51317--9406-SG
ISBN: 9406 2017 CP
Author: Ajit Mishra
Publication Date: 2017
$20.00

In the present study, corrosion behavior of base metal (BM), all-weld-metal (AWM) and heat-affected-zone (HAZ) samples of C-276 (UNS N10276), C-22 (UNS N06022) and C-2000 (UNS N06200) alloys were evaluated in concentrated hydrochloric (HCl), sulfuric (H2SO4) and nitric acid (HNO3).

 
Picture for The Sensitisation Behaviour of Alloy UNS N08825 After Heat Treatment as Used in Clad Materials
Available for download

The Sensitisation Behaviour of Alloy UNS N08825 After Heat Treatment as Used in Clad Materials

Product Number: 51317--9459-SG
ISBN: 9459 2017 CP
Author: Helena Alves
Publication Date: 2017
$20.00

The aim of this paper is to present recent standard test corrosion data obtained in laboratory for alloy UNS N08825 after post weld heat treatment in comparison with as delivered (soft annealed) material.

 

Picture for 03398 SELECTIVE CORROSION IN DUPLEX STAINLESS
Available for download

03398 SELECTIVE CORROSION IN DUPLEX STAINLESS STEEL

Product Number: 51300-03398-SG
ISBN: 03398 2003 CP
Author: Wen-Ta Tsai, Kuen-Ming Tsai, Changjan Lin
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support