Paint and Corrosion Adhesion Testing
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Abrasion Testing
Accelerated Life Testing
Chemistry Laboratory
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Failure Analysis
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PAINT AND COATINGS LABORATORY
- Abrasion Testing
- Accelerated Life Testing
- Adhesion Testing
- Chemistry Analysis
- Corrosion Protection
- Failure Analysis
- Film Hardness Testing
- Film Thickness Measurement
- Formability Testing
- Gloss Measurement
- Heat Resistance Testing
- Solvent Testing
- Standard Applications Testing
- Impact Testing
- Volatiles – Total
- Volume Solid
Paint and Corrosion Adhesion Testing
Coating Specimen After Impact Testing
Touchstone’s Mechanical Testing Laboratory offers a variety of both standard and custom tests which can be used to measure resistance to cracking (flexibility) and adhesion of attached organic coatings on substrates of sheet metal or rubber-type materials. Among them are:
- Direct and Reverse Impact Test (ASTM D2794) [Shown above]
- T-Peel Test
- Direct Tensile Testing (ASTM D5179)
- Mandrel Bend Tests (ASTM D522)
- Olsen Cup Tests
- Bend Test (ASTM D4145)
- Peel Test (ASTM B571)
- Tape Test (ASTM D3359) [Described below]
Measuring Adhesion by Tape Test (ASTM D 3359)
“Standard Test Method for Measuring Adhesion by Tape Test”
ASTM D3359 provides two test methods for assessing the adhesion of coating films to metallic substrates by applying and removing pressure-sensitive tape over cuts made in the film.
In Test Method A, an “X-cut” is made in the film to the substrate, pressure-sensitive tape is applied over the cut and then removed, and adhesion is assessed qualitatively on a 0 to 5 scale.
In Test Method B, a lattice pattern with either six or eleven cuts in each direction is made in the film to the substrate, pressure-sensitive tape is applied over the lattice and then removed, and adhesion is evaluated by comparison with descriptions and illustrations.
Method A is primarily intended for use at job sites, while Method B is more suitable for use in the laboratory. The cross-hatch test, Method B, is not considered suitable for films thicker than 5 mils (125 micometers).