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51317--9749-Corrosion Resistance of Alloys in Calcium Bromide and Calcium Chloride Solutions

Picture for Corrosion Resistance of Alloys in Calcium Bromide and Calcium Chloride Solutions
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Calcium bromide is used in the coal fire power plant industry to help control mercury emissions. The objective of this study was to determine the effect of bromide additions in chloride-rich Wet Flue Gas Desulfurization slurries on the crevice corrosion resistance of commercially-available corrosion resistant alloys.

Product Number: 51317--9749-SG
ISBN: 9749 2017 CP
Author: Brett Tossey
Publication Date: 2017
Industry: Energy Generation
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Calcium bromide is used within the coal fire power plant industry to assist with controlling mercury emissions. A direct consequence of adding bromide ions to the flue gas is that the total halide ion content of the Wet Flue Gas Desulfurization (WFGD) slurry increases. The objective of this study was to determine the effect of bromide additions in chloride-rich WFDG slurries on the crevice corrosion resistance of commercially-available corrosion resistant alloys. A laboratory study employed cyclic potentiodynamic polarization (CPP) methods to compare the performance of three different alloys in model solutions with varying concentrations of calcium chloride calcium bromide and a mixture of calcium chloride and calcium bromide. The alloys had pitting resistance equivalent numbers of 35 44 and 66. Three factors from the CPP tests were assessed: the open circuit potential the breakdown potential and the repassivation potential.A multi-variable regression analysis was performed to help reveal the statistically significant relationship(s) between open circuit potential the breakdown potential the repassivation potential and the total halide ion concentration.

Key words:  calcium bromide, coal, mercury emissions, WFGD, CRA 

Calcium bromide is used within the coal fire power plant industry to assist with controlling mercury emissions. A direct consequence of adding bromide ions to the flue gas is that the total halide ion content of the Wet Flue Gas Desulfurization (WFGD) slurry increases. The objective of this study was to determine the effect of bromide additions in chloride-rich WFDG slurries on the crevice corrosion resistance of commercially-available corrosion resistant alloys. A laboratory study employed cyclic potentiodynamic polarization (CPP) methods to compare the performance of three different alloys in model solutions with varying concentrations of calcium chloride calcium bromide and a mixture of calcium chloride and calcium bromide. The alloys had pitting resistance equivalent numbers of 35 44 and 66. Three factors from the CPP tests were assessed: the open circuit potential the breakdown potential and the repassivation potential.A multi-variable regression analysis was performed to help reveal the statistically significant relationship(s) between open circuit potential the breakdown potential the repassivation potential and the total halide ion concentration.

Key words:  calcium bromide, coal, mercury emissions, WFGD, CRA 

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Corrosion of Stainless Steels and Titanium in Bromide-Containing Solutions

Product Number: 51312-01253-SG
ISBN: 01253 2012 CP
Author: Bahri Ozturk
Publication Date: 2012
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Experiments to determine the critical pitting temperature of several alloys in calcium bromide solutions using the ASTM G150 electrochemical critical pitting test procedures. Similar experiments were also conducted in solutions containing equal concentrations (by weight) of chlorides and bromide.
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Ammonium Chloride Corrosion in the Refining Industry

Product Number: 51317--9574-SG
ISBN: 9574 2017 CP
Author: Sudhakar Mahajanam
Publication Date: 2017
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This paper summarizes key case studies where Ammonium Chloride (NH4Cl) corrosion was observed. Best practices for process control and corrosion mitigation strategies have been recommended based on the learnings from these failures.

 
Picture for Differences in Fireside Corrosion Under Simulated Char and Lignite Conditions
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51317--9765-Differences in Fireside Corrosion Under Simulated Char and Lignite Conditions

Product Number: 51317--9765-SG
ISBN: 9765 2017 CP
Author: Mathias Galetz
Publication Date: 2017
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Fireside corrosion is a serious concern for power generation industry since the harsh conditions lead to an accelerated corrosive attack of plant components. This study aims to investigate the fireside corrosion behavior of different metals under char and lignite conditions and with increased amount of chlorine and potassium. 

 
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