Literature PDF

Index and glossaryThese definitions are given primarily in theirrelation to high-performance fluoropolymercoatings and their use in this publication.Abrasion: A wearing, grinding, or rubbingaway by friction. Pages 3, 5, 25, 26, 27, 33.Whitford‘s unique Gyrograph provides a sensitivemeasure of abrasion and coating adhesion, especiallyof intercoat adhesion (a common source of failure).Additives: Materials added to coatings toenhance certain properties. Page 13.Alkaline wash: Cleaning process thatemploys a high pH solution (caustic). A goodchoice for parts with little buildup of contaminants.Pages 19, 20, 24.Aluminum oxide: Hard particulate mediumused in grit blasting to clean and roughen surfacesthat are to be coated. Pages 19, 41.Anodizing: Creating a hard oxide layer onaluminum parts via an electrolytic process.Unsealed hard anodized surfaces have a porositythat makes them excellent substrates for coatings.Page 20.Babbitt metal: a soft alloy of tin, copper andantimony. Page 24.Binder: Tough polymer that acts as an adhesiveto join elements of matrix coatings. Pages2, 3, 4, 5, 12, 23, 39, 40.Boundary lubrication: Condition in which alubricating film between sliding surfaces has lostits hydrodynamic property due to heat, pressureor low speed. As a result, the surfaces are virtuallytouching, separated only by a layer of lubricanttoo thin to be effective. Potential for metalto-metalcontact and damage to surfaces isgreat. Page 8.Break in: Initial wear of mechanical componentswhen large surface asperities (peaks) cancause high friction and wear rates. Page 15.Brinelling: Surface fatigue of steel componentsthat undergo cyclic stress, which causesminute flexing resulting in work-hardening of thesurface. Eventually, brinelling may cause surfacecracking or spalling. Page 5.Buffing/Burnishing: Process of polishing acured coating to enhance release and low frictionproperties. Pages 9, 10, 23.Carrier: Liquid portion of a coating in whichsolids are dissolved or suspended. Pages 3, 4,20, 22.Cold flow: Tendency of plastic materials tomigrate slowly under heavy loads and/or overtime. Pages 3, 12.Conductor: Material that can support flow ofelectrical current. Coatings are normally insulators,but can be modified with certain fillers andpigments to make them conductive. Page 13.Corrosion: Process of metal decomposition(oxidation) in which metal ions are united withoxygen to form metal oxides. Fluoropolymercoatings provide excellent barriers against mostcorrosives. Pages 1, 2, 3, 4, 5, 6, 7, 9, 11, 12, 14,16, 17, 19, 20, 23, 24, 34.Crosslinking: Quality of thermosetting plasticresins in which polymer chains combine duringcuring process. In general, the greater thecrosslinking, the tougher and more chemicallyresistant the coating. Page 23.Cryogenic: Temperatures less than -130°C/-200°F. Bonded dry-film lubricants continue toperform at these temperatures. Pages 5, 12.38