Study of the capacity to intumesce of two paint systems exposed to aggressive internal environments
Keywords:Fire resistance, Steel, Exposure conditions, FTIR
The influence exerted by temperature on the resistant capacity of structural steel is well known. A highly efficient protection system for steel consists of the application of intumescent paints. In the case of fire, their effectiveness is based on the property that when they come into contact with flames they react by swelling to form an insulating layer, referred to as "intumescence", which impedes the propagation of heat. These paints do not require continuous maintenance though their service behaviour depends on the exposure conditions to which they are exposed. This paper studies the behaviour of two acrylated rubber type intumescent systems exposed to a galvanising plant for 16 months, evaluating the effect of the environment on the capacity to intumesce of the coating when subjected to heating.
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