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Galvanic Corrosion in Water & Wastewater Structures: Coupling Stainless and Carbon Metals Leads to Accelerated Corrosion

Galvanic Corrosion in Water & Wastewater Structures: Coupling Stainless and Carbon Metals Leads to Accelerated Corrosion
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Stainless steel is selected for use in the municipal waterworks industry because of its inherent corrosion resistance properties.  Designers oftentimes overlook the associated problems with coupling stainless steel with carbon steel metals. When these materials are electrically connected and placed into aqueous environments (immersion service) accelerated corrosion of the anodic carbon steel metal is initiated. 

Product Number: 41214-840-SG
Author: Vaughn O’Dea, Travis C. Tatum, Pat Barry, Paul B. Higgins
Publication Date: 2014
Industries: Water/Wastewater , Coatings , Coatings and Linings
$0.00
$20.00
$20.00

Stainless steel is selected for use in the municipal waterworks industry because of its inherent corrosion resistance properties.  Designers oftentimes overlook the associated problems with coupling stainless steel with carbon steel metals. When these materials are electrically connected and placed into aqueous environments (immersion service) accelerated corrosion of the anodic carbon steel metal is initiated. This paper will review the galvanic (bi-metallic) corrosion theory, present the results from a galvanic coupling study, and provide examples where bare stainless steel and coated carbon steel metals were coupled in water and wastewater structures.

Stainless steel is selected for use in the municipal waterworks industry because of its inherent corrosion resistance properties.  Designers oftentimes overlook the associated problems with coupling stainless steel with carbon steel metals. When these materials are electrically connected and placed into aqueous environments (immersion service) accelerated corrosion of the anodic carbon steel metal is initiated. This paper will review the galvanic (bi-metallic) corrosion theory, present the results from a galvanic coupling study, and provide examples where bare stainless steel and coated carbon steel metals were coupled in water and wastewater structures.

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