What Does Settlement Mean?
Settlement refers to the occurrence of a paint storage defect in which the pigment is not uniformly mixed prior to application because the pigment sunk to the bottom of the container. Therefore, such paints are of inadequate consistency to serve as a protective coating against corrosion on a metallic surface.
Corrosionpedia Explains Settlement
Settlement can be problematic when applying protective coatings. It is usually due to inadequate stirring or agitation following storage, or due to improper dilution.
Settlement can be prevented by the following methods:
- Use of adequate dilution and/or thickening chemicals to support agitation
- Mix or stir periodically as part of preventative maintenance
- Store paint containers in a temperature-regulated environment
Coagulation may occur during settlement formation due to the molecular structures and physical properties of the components. Coagulation makes spray application, surface modification and paint removal more difficult. Therefore, coatings must be applied after initial mixing but before the onset of coagulation and/or settlement.