Many accelerated electrolytic metal migration and corrosion investigations have been performed in accelerated test chambers with unknown gas concentration and flow characteristics. This paper outlines the development of a wellcharacterized accelerated test chamber. The length (mean flow path) to hydraulic diameter ratio of the closed-circuit rectangular flow channel is 20. Velocity and concentration measurements showed minimal horizontal or vertical gradients in the test section. The range of standard deviations (m/s) for the velocity profiles in the test section was 0.0037-0.16 at mean velocities of 0.11-2.9 m/s, respectively. Similarly, the range of standard deviations [ppm(vol.) SO2] for the SO~ concentration profiles was 1.0-1.2 for a standard gas mixture of 102 _+ I.i ppm SO2 in the air. The effect of gas velocity upon the rate of metal migration was demonstrated in the described test chamber using a new accelerated test in an SO2 environment. This test, the PEG-400 drop test, is a moderate accelerated test with metal migration rates that are less than the water-drop test but greater than a temperature humidity bias test with or without pollutants. The gas velocity was found to have a significant effect upon the rate of copper migration.The effects of gas velocity, humidity, and pollutant concentrations upon the metal migration and corrosion rates can be investigated in this accelerated test chamber.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.