These test methods cover procedures for assessing the
adhesion of relatively ductile coating films to metallic substrates by applying and removing pressure-sensitive tape over
cuts made in the film.
Terminology
- Adhesion—the molecular attraction and mechanical
bonds between a coating and its substrate.
- Batch—as it pertains to tape, a unique production
run during manufacturing.
- Blemish, —an obvious surface flaw, such as cracking
or discoloration of the coating.
- Environmental conditions—the characteristics of the
immediate surroundings during the tests, such as temperature,
and relative humidity
- Immersion conditions—the characteristics of the
fluid to which the test specimen was exposed, such as type of
fluid, temperature of fluid and duration of immersion.
- Lap—one complete turn of the tape on a roll; the
outer exposed layer of tape.
- Lattice pattern—one series of parallel lines inter�sected by another set of parallel lines that are at 90° to and
centered on the first set.
- Mean—the classification rating that is obtained by
adding together the digits of the classification ratings of the
tests performed and dividing by the number of tests, frequently
rounded to the nearest whole number classification rating.
- Pressure-sensitive tape—tape with an adhesive that
requires some degree of pressure, and only pressure, to
adequately bond to a surface.
- Range—the span of classification ratings for a set
of tests, from minimum classification rating to maximum
classification rating.
- Solvent—a liquid agent capable of dissolving or
dispersing contaminants from the surface of the coating or film.
- Substrate—the structural foundation beneath the
coating or film being tested.
- Template—a thin, rigid plate containing evenly
distributed, parallel slits for use as a guide in generating the
lattice pattern when accompanied by a single-blade cutting
tool.
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bonds between a coating and its substrate.
run during manufacturing.
or discoloration of the coating.
immediate surroundings during the tests, such as temperature,
and relative humidity
fluid to which the test specimen was exposed, such as type of
fluid, temperature of fluid and duration of immersion.
outer exposed layer of tape.
centered on the first set.
adding together the digits of the classification ratings of the
tests performed and dividing by the number of tests, frequently
rounded to the nearest whole number classification rating.
requires some degree of pressure, and only pressure, to
adequately bond to a surface.
of tests, from minimum classification rating to maximum
classification rating.
dispersing contaminants from the surface of the coating or film.
coating or film being tested.
distributed, parallel slits for use as a guide in generating the
lattice pattern when accompanied by a single-blade cutting
tool.
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