ACCELERATED CORROSION TESTING OF INDUSTRIAL MAINTENANCE PAINTS USING A CYCLIC CORROSION WEATHERING METHOD

Abstract

The importance is shown of incorporating weathering factors in accelerated laboratory tests used to assess the corrosion-controlling properties of an organic coating. The cyclic wet/dry corrosion test, with ultraviolet light condensation weathering factors incorporated, showed promise in meeting the requirements of an accelerated test. Through this approach, an improved reproduction of rankings and failure modes observed in practice was possible. The wet/dry corrosion test and particularly the continuous salt spray test were not found to be satisfactory in this respect. It is noted that the corrosion/weathering testing technique described appeared to have the sensitivity required for applications in product development programs.