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Wastewater treatment plant clarifier environments present challenges for selecting materials of construction. Coated carbon steel, hot-dip galvanized steel, and stainless steel are most commonly specified for new or refurbished clarifier mechanisms, and all have their advantages and disadvantages with regard to achieving the intended design life.
Wastewater treatment plant clarifier environments present challenges for selecting materials of construction. Coated carbon steel, hot-dip galvanized steel, and stainless steel are most commonly specified for new or refurbished clarifier mechanisms, and all have their advantages and disadvantages with regard to achieving the intended design life. This presentation discusses the corrosive conditions in primary and secondary clarifiers; how various process conditions can affect the corrosion mechanisms; in what situations each of these construction materials is or is not appropriate; and how fabrication quality and other details can affect corrosion resistance. Also discussed are the detrimental electrochemical effects of using combinations of these materials, and how those effects can be minimized. Examples will be presented from clarifiers in Texas, Nevada, and New England.
The aim of this paper is to review the main aspects of the material selection for the chemical process industry (CPI) and present different examples to illustrate the material selection process.
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To evaluate the applicability of the tubing steels, the corrosion behavior and stress corrosion cracking of tubing steels (P110S, P110-13Cr and duplex stainless steel 2205) were investigated under different H2S partial pressures and temperature.
This paper addresses the challenges to provide example of engineering solutions through the use of corrosion resistant alloys and non metallic materials to maintain the integrity of flowlines and process equipment in severe sour service.