Olivia Marie Schmelzer, Gregory P. Wolters



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With corrosion costs in the US reaching approximately $725 billion (1) in 2019, understanding and preventing corrosion is vital. Salt fog chambers have been used in the laboratory to analyze the phenomenon of corrosion for years, but standardized exposure tests have been primarily developed for use with chromate based primers, which are being phased out for environmental and health reasons. This study aims to understand crystallization of aerosolized salt water on various substrates, as well as the effect of successive periods of high humidity on crystal size and distribution. Creating a laboratory environment that accurately represents corrosion in the outside world is imperative for the field of corrosion science and would allow for better screening of non-chrome corrosion protection methods. An understanding of the deposition of salt from an atomized spray solution onto a metal surface in an environmental chamber, and the effect of humidity cycles on the deposition process is essential to this development. To accomplish this, laser microscope image and corrosion sensor data were collected for a variety of fog cycle times, salt mixtures, and humidity exposure times, with the goal being the calibration of a chamber to match the deposition rate and morphology of salt crystals seen on metal surfaces in field studies.1.Koch, Gerhardus. “1 - Cost of Corrosion.” Trends in Oil and Gas Corrosion Research and Technologies, Jan. 2017

Publication Date


Project Designation

Graduate Research

Primary Advisor

David J. Borth, Douglas C. Hansen

Primary Advisor's Department

Chemical and Materials Engineering


Stander Symposium project, School of Engineering

United Nations Sustainable Development Goals

Industry, Innovation, and Infrastructure

Analysis of Salt Deposition and Deliquescence in Environmental Test Chambers