Wet Heat Test Techniques and the Comparative Analysis of Test Standard
Products serving in the tropics and subtropics may have problems under the influence of a warm and humid environments.Therefore,it is necessary to conduct a warm and humid environment assessment during the product development cycle to evaluate its moisture and heat resistance.Only the correct execution of the damp heat test can ensure the reliable operation of the product in the hot and humid environment.This paper first introduces the principle of damp heat and related factors,and fundamentally understands the action mode of damp heat on products;Then,the effect of dampness and heat,the influence of humid environment on the product,the failure mode and failure mechanism are expounded.At last,the differences between laboratory simulation and actual environment,the types of wet heat tests,the standards to be adopted and the differences among them are expounded.Through the introduction of the concept and principle of damp and heat,the failure mode and failure mechanism caused by damp and heat,as well as the selection of the types and standards of damp and heat test,the reference is provided for the design of damp and heat resistance of products and the assessment of damp heat test.
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