Powder Coating Test

By far the most prevalent test for evaluating coating ”adhesion”is the tape-and-peel test, which has been used since the 1930’s. In its simplest version a piece of adhesive tape is pressed against the paint film and the resistance to and degree of film removal observed when the tape is pulled off. Since an intact film with appreciable adhesion is frequently not removed at all, the severity of the test is usually enhanced by cutting into the film a figure XRead More …

For some years now, special time-compressed corrosion tests based on recommendations made by European quality associations have become more established. The following are worthy of mention: condensation test, acid and neutral salt spray test, filiform corrosion tests and specific automotive test standards. Despite the demand to speed up tests, testing times of between 40 and 60 days are typical, thus rendering the tests irrelevant as far as real-time production control is concerned. In this regard, rapid innovative corrosion tests areRead More …

The ISO 2409 Cross Cut Test has been recently updated by ISO. The new version that is now valid has several changes compared to the old one: Knives The new standard includes an enhanced description of the well-known knives.The knives need to have a trailing edge, because otherwise it skates instead of scratches. Knives that do not have this trailing edge are not according to the standard. Tape The new version of the standard has a huge change compared toRead More …

Tests of powder coatings Surface Characteristics Test Method Procedure (s) Primary Test Equipment Surface Characteristics Smoothness PCI # 20 Smoothness Standards Gloss ASTM D523 Glossmeter Color ASTM D2244 Colorimeter Distinctness of Image Visual Observations Contrast Ratio PCI #3 Special Substrates, ASTM D2805 Reflectance Instruments Physical Characteristics Physical Test Primary Test Equipment Characteristics Procedure (s) Film Thickness ASTM D 1186 Magnetic Film Thick Gauge, ASTM D1400 Eddy Current Induce Gauge Impact ASTM D2794 Impact Tester Flexibility ASTM D522 Conical or Cylindrical Mandrel Adhesion ASTM 2197 Balanced-Beam Scrape-Adhesion, ASTM D3359 Cross Hatch Cutting Device and Tape Hardness ASTM D3363 Calibrated Drawing Leads or Pencils Abrasion Resistance ASTM D4060 Taber Abrader and Abrasive Wheels ASTM D968 Edge Coverage ASTM 296 Standard Substrate and Micrometer Chip Resistance ASTM D3170 Gravelometer   Test Method Procedure(s) Primary Test Equipment Environmental Characteristics Solvent Resistance MEK or other Stain Resistance ASTM D1308 Standard Reagents Chemical Resistance Immersion or Spot Tests Humidity ASTM D 1735 Standard Water Fog ASTM D2447 Chamber, Test Chamber 100% RH at 100F Salt Spray ASTM B117Read More …