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Condensation is an excellent way to simulate the moisture attack that materials experience outdoors. High-humidity condensing environments can be generated in QCT, QUV, Q-SUN and Q-FOG testers. However, not all condensation testing is the same. There...

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Weatherability and corrosion data are necessary for the selection of new materials and the improve - ment of existing materials. The main weathering forces that may cause material degradation are sunlight, high temperature and moisture. Outdoor expos...

Background In the early 1900s, researchers began to assess the weatherability of materials by exposing specimens outdoors on vertical, south-facing racks. By 1908, members of ASTM Committee D-1 and the Paint Manufacturer’s Association began outd...

It is important to properly quantify the results of any exposure testing program. Typically, the client is interested in the type and/or amount of change in a material's properties. Change in some prop - erties, for example color or gloss, can be mea...

There are quite a number of laboratory methods for accelerated simulation of the damage caused by rain and dew on metals and organics. However, the old fashioned methods of water immersion, high humidity, fog, or salt spray are not entirely satisfact...

There are three general categories of filters which can be used in the Q-SUN ® xenon test chamber. The choice of filter depends upon the material tested and its end-use application. Within each general category, there may be several different types o...

Abstract For decades, automotive coatings have experienced degradation in the form of etching on coatings exposed to acid rain. As a result, procedures were developed to simulate and accelerate this type of degradation. These procedures failed t...

AbstractMany attempts have been made in the past to develop a test that can predict the acid etch resistance of automotive clearcoats. Methods such as the Gradient Bar and Acid Spot are just two examples of the numerous laboratory methods used in ind...