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Presents: Relationship between humidity and degradation rates. CHP systems deployment throughout the Department of Defense. CHP systems in use on Aircraft, etc. DoD, U.S. Marine Corps and Naval Aviation CHP policy. Independent CHP performance / economic analyses by GAO. User-reported performance
Creating a Controlled Humidity Protection (CHP) environment of between 30% and 40% relative humidity stops atmospheric corrosion. The paper presents: • The relationship between relative humidity and corrosion/material degradation rates. • The extent of CHP systems deployment throughout the Department of Defense, highlighting U.S. Marine Corps, Army National Guard and Naval Aviation applications. • CHP systems in use on Aircraft, aviation and weapons Support Equipment, and other combat equipment. • DoD, U.S. Marine Corps and Naval Aviation CHP policy directives. • Independent CHP performance and economic analyses by the General Accounting Office, DoD Inspector General and Army Cost and Economic Analysis Center (CEAC). • User-reported performance and economic results. Keywords: corrosion, humidity, dehumidification, rust, Controlled Humidity Protection
Keywords: corrosion, humidity, dehumidification, rust, Controlled Humidity Protection
Austenitic stainless steels are susceptible to caustic stress corrosion cracking (SCC) above 121°C. When sulfides are present in caustic solutions the SCC has been reported to occur at lower temperatures. This paper discusses a study of the role of sulfide in caustic solutions on SCC of austenitic stainless at T=~50°C.
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A case history is described involving microbiologically influenced corrosion (MIC) of AISI Type 304L stainless steel piping failure after being in contact with untreated stagnant, low chloride potable water for nine months. Specialized microbiological analysis techniques, including scanning electron and optical cmicroscopy, were used in the failure analysis.
Results of inhibitor performance at slug flow in a 101.6 mm inner diameter horizontal pipeline. Electrochemical Impedance Spectroscopy (EIS) and scanning electrom microscope (SEM) techniques are used to reveal that the strong bubble impact, high shear stress and turbulent intensity are the reasons for a poor performance of inhibitor.