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51317--9747-Recent Failures of 2205 Duplex Stainless Steel in FGD Scrubbers - Could They Have Been Avoided?

Over 5 years, 70 to 80 FGD scrubber units have exhibited corrosion problems. Many were after only a few months of service. This paper will provide an overview of readily available technical information in the published literature and past experience that could have been used to minimize corrosion problems in these FGD units.

 

Product Number: 51317--9747-SG
ISBN: 9747 2017 CP
Author: Bud Ross
Publication Date: 2017
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$20.00
$20.00

Over the past 5 years more than 80 FGD scrubber units have reportedly exhibited serious corrosion problems. In the United States alone many of these problems were encountered after only a few months of service. The primary materials of construction ?in the affected units were duplex stainless steels. This paper will provide an overview of readily available technical information in the published literature and past experience that could have been used to minimize corrosion problems in these FGD units. The materials selection process will be discussed as it relates to specific FGD scrubber components and include defining the FGD environment(s) candidate alloys fabrication and welding requirements mechanical and physical factors testing and inspection and other features such as safety compatibility availability and cost.

Key words: 2205 duplex stainless steel, crevice corrosion, scrubbers, failures, pH, chloride, slurry sump

Over the past 5 years more than 80 FGD scrubber units have reportedly exhibited serious corrosion problems. In the United States alone many of these problems were encountered after only a few months of service. The primary materials of construction ?in the affected units were duplex stainless steels. This paper will provide an overview of readily available technical information in the published literature and past experience that could have been used to minimize corrosion problems in these FGD units. The materials selection process will be discussed as it relates to specific FGD scrubber components and include defining the FGD environment(s) candidate alloys fabrication and welding requirements mechanical and physical factors testing and inspection and other features such as safety compatibility availability and cost.

Key words: 2205 duplex stainless steel, crevice corrosion, scrubbers, failures, pH, chloride, slurry sump

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