Wednesday, July 4th, 2012
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Differential scanning calorimetry for coating curing
Via the DSC technique it can be verified if the coating is sufficiently cured or not. The DSC is a technique verifying how much energy is needed to have no temperature difference between the substance in test phase and the referential material, determined in according to time and temperature, when two specimen are submitted to identical temperature conditions in a controlled warm or cooled environment. First of all, the thermal history of the material is disturbed by the fast coolRead More …
Test Standard for weathering resistance of powder coatings
Resistance to mortar According to the standard ASTM C207. A specific mortar will be brought in contact with powder coating during 24h at 23°C and 50% relative humidity. Accelerated ageing and UV durability (QUV) This test in the QUV-weatherometer consists of 2 cycles. The coated testpanels are 8h exposed to UV-light and 4h to condensation. This is repeated during 1000h. Every 250h the panels are checked. Herewith the coating is tested on colour- and gloss retention. Saltspraytest According to theRead More …
General Mechanical properties of powder coatings
Cross-cut Test (adhesion) According the standards ISO 2409, ASTM D3359 or DIN 53151. On the coated test panel a cross-cut (# : indentations in the form of a cross and parallel to each other with a mutual distance of 1 mm or 2 mm) is made on the metal. A standard tape is put on the cross-cut. The cross-cut is valued through the quantity of the detached film after removing the tape. Flexibility A coated standard test panel is foldedRead More …
D5 Creation