ASTM D4538-95
(Terminology)Standard Terminology Relating to Protective Coating and Lining Work for Power Generation Facilities
Standard Terminology Relating to Protective Coating and Lining Work for Power Generation Facilities
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Designation: D 4538 – 95
Standard Terminology Relating to
Protective Coating and Lining Work for Power Generation
1
Facilities
This standard is issued under the fixed designation D 4538; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
alligatoring—in protective coatings, surface cracking of coat- drips—in protective coatings, the small drops of coating that
ing film having an appearance similar to alligator hide. collect on the edge of the coated work.
certification—in protective coatings, the written documenta- dry spray—in protective coatings, a rough, powdery, non-
tion of the qualification of personnel or material. coherent film produced when an atomized coating partially
checking—in protective coatings, the formation of slight dries before reaching the surface.
breaks in a coating film that do not penetrate to the exudation—the migration of a substance to the surface of a
underlying surface. coating or lining film.
coating applicator—in protective coatings, an organization or flaking—in protective coatings, the detachment of small pieces
individual responsible for applying a protective or decora- of the coating film.
tive coating. foreign matter—in protective coatings, insoluble foreign par-
coating system—in protective coatings, a protective film ticles such as sand, lint, dust, and dirt that get mixed with the
consisting of one or more coats, applied in a predetermined coating material before, during, or after application; causing
order by prescribed methods. the formation of raised specks in the dried film.
coating work—in protective coatings, an all-inclusive term to hairline crack—in protective coatings, a very fine crack
define all operations required to accomplish a complete (having a hairlike appearance) that is visible on the surface
coating job; construed to include materials, equipment, of a dried coating film.
labor, preparation of surfaces, control of ambient conditions, heavy-centered spray pattern—in protective coatings,an
application of coating systems, and inspection. uneven spray pattern having more coating in the center, and
cobwebbing—in protective coatings, the formation of fine less at the edges.
filaments (cobwebs) or partly dried coating, during spray intercoat contamination—in protective coatings, the presence
application. of foreign matter between successive coats.
cracking—in protective coatings, the formation of breaks in a mudcracking—in protective coatings, a particular pattern of
coating film that extend through to the underlying surface. cracking in a coating with the appearance of a dried mud
cratering—in protective coatings, the formation of round puddle (see cracking and checking).
depressions in a coating film that do not expose the previous orange peel—in protective coatings, the dimpled appearance
coat or the substrate. of a dried coating film resembling the surface of an orange.
crawling—in protective coatings, a defect
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