This part of GB/T 2423 specifies a standard test method for evaluating the effect of damp heat degradation of small electrical and electronic products (mainly non-hermetic components) in an accelerated manner. This test is not suitable for assessing external effects such as corrosion and deformation.
1997GB/T 2423.40-1997 Environmental testing for electric and electronic products. Part 2: Test methods. Test Cx: Damp heat, steady state (unsaturated pressurized vapour)