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Combatting Localized Galvanic Corrosion at Bolted Connections in Gravity Sludge Thickeners and Clarifiers in Wastewater Treatment Plants
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Combatting Localized Galvanic Corrosion at Bolted Connections in Gravity Sludge Thickeners and Clarifiers in Wastewater Treatment Plants

Product Number: 51220-269-SG
Author: R. A. Nixon
Publication Date: 2020
$20.00

This paper will describe this commonplace corrosion problem associated with protective coating damage at dissimilar metal bolted connections and present a typical case history. The paper will go on to explain why slotted bolt holes are more susceptible to more aggressive corrosion damage than round bolt holes. In addition, the paper will present successful measures that can be taken to prevent this prevalent problem. 
Combatting Localized Galvanic Corrosion at Bolted Connections in Gravity Sludge Thickeners and Clarifiers in Wastewater Treatment Plants
Available for download

Combatting Localized Galvanic Corrosion at Bolted Connections in Gravity Sludge Thickeners and Clarifiers in Wastewater Treatment Plants

Product Number: 51220-275-SG
Author: R. A. Nixon
Publication Date: 2020
$20.00

This paper will describe this commonplace corrosion problem associated with protective coating damage at dissimilar metal bolted connections and present a typical case history. The paper will go on to explain why slotted bolt holes are more susceptible to more aggressive corrosion damage than round bolt holes. In addition, the paper will present successful measures that can be taken to prevent this prevalent problem. 
Determining When to Coating Concrete
Available for download

Determining When to Coating Concrete

Product Number: 51220-259-SG
Author: Manuel Najar
Publication Date: 2020
$20.00

Reinforced concrete is the most common building material in water and wastewater treatment facilities. It is very common to see unprotected concrete in severely corrosive environments or corroding reinforcing steel that has been exposed due to construction defects or coating failures. The decision to coat new and existing concrete structures can be very difficult for owners due to the cost, turn-around times for putting structures back into service, and lack of confidence in certain protective coatings. 
Determining When to Coating Concrete
Available for download

Determining When to Coating Concrete

Product Number: 51220-268-SG
Author: Manuel Najar
Publication Date: 2020
$20.00

Reinforced concrete is the most common building material in water and wastewater treatment facilities. It is very common to see unprotected concrete in severely corrosive environments or corroding reinforcing steel that has been exposed due to construction defects or coating failures. The decision to coat new and existing concrete structures can be very difficult for owners due to the cost, turn-around times for putting structures back into service, and lack of confidence in certain protective coatings. 
Picture for Laboratory experiments vs Field experience – Localized corrosion performance of lean duplex stainless steel UNS S32202 in municipal wastewater treatment plants
Available for download

Laboratory experiments vs Field experience – Localized corrosion performance of lean duplex stainless steel UNS S32202 in municipal wastewater treatment plants

Product Number: 51323-19159-SG
Author: Audrey Allion, Charles David, Benoit Emo, Nicolas Larché
Publication Date: 2023
$20.00

Thanks to their good corrosion resistance and ease to shape and weld, austenitic stainless steel grades (e.g. UNS S31603) are used as standard materials for the construction of municipal wastewater treatment plants (WWTP). The main factors influencing the corrosiveness of the fluids in WWTP are halides concentration (more specifically chlorides), H2S content, low pH, temperature and their combined effects.

In municipal wastewater streams, chloride content, known to be one of the critical agents affecting the stability of protective passive layers for stainless steels2, is usually around 50-200 mg/L and in this content range does not present major issues for the austenitic grade.
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