Why are most products tested for moisture and heat?
In the reliability test, humidity is generally applied in the high temperature section, and the combined effect of high temperature and low temperature in the later period should be considered in the analysis of the fault mechanism induced by humidity. In terms of mechanical properties, the surface decomposition, mildew growth and deformation of the moisture intrusion materials are discussed.
If it acts at the same time with high temperature, the moisture absorption of insulating materials will accelerate, and even produce adsorption, diffusion and absorption phenomenon and respiration, so that the surface of the material swelling, deformation, foaming, coarser, but also increase the friction of moving parts or even stuck; In electrical, due to humidity, in the temperature change is easy to produce frost phenomenon, resulting in electrical short circuit.