Chapter Seven - Definitions Flashcards
What is adhesion?
The process in which dissimilar molecules cling together due to attractive forces. Adhesion can be chemical, mechanical, polar, or a combination of all three.
What are barrier coatings?
A coating that 1) has a high resistance to permeation of liquids and /or gases, or 2) is applied over a previously coated surface to prevent damage to the underlying coating during subsequent handling.
What is a binder?
The nonvolatile portion of the vehicle of a formulated coating material.
What is inhibitive pigment?
A pigment that passivates the metal surface by forming a thin , tightly adherent film or by reinforcing and plugging defects in the natural air-formed film.
What are inorganic coatings?
Coating whose binders are made from non-living or once-living things.
What are organic coatings?
Coating whose binders are made from living or once-living things.
What is pigment?
The fine solid particles added during the manufacture of a coating which are substantially insoluble in the vehicle, used to impart colour, corrosion control, or decorative properties.
What are sacrificial coatings?
Coatings that use a metal that is anodic to steel and corrodes preferentially. Essentially, sacrificial coatings provide cathodic protection, especially in the vicinity of film defects.
What are solvents?
Added to coatings to liquefy the binder and allow for application in a productive.
What are additives?
Liquid components of a coating, typically added In small amount to perform a specific function.
