Bachelor of Science
Date of Graduation
It is important to understand the role of salt in the coating failure because it may influence the coating degradation mechanism that is related to coating performance. This project will study the role of salt on two types of organic coatings under two different immersion environment. The environment selected was 3.5% by weight sodium chloride solution and deionized (DI) water. The two coatings were Neorez 1080 (a waterborne polyurethane) and Joncryl 587-AC (a solvent borne polyurethane). Each coating was tested in each environment using electrochemical impedance spectroscopy (EIS) measurement which presented a total of four data sets. The equivalent circuit modeling was used to fit the EIS data in order to study the physical behavior of the coating. The conclusion is that a sodium chloride solution will cause rapid coating failure compared to DI water for the two types of coatings evaluated in this project.
Krause, Kyle, "Role of Salt on Coating Failure" (2017). Williams Honors College, Honors Research Projects. 514.