Damp heat test methods and related standards

Date：2023-09-22 15:58:41 Views：462

Damp heat test is a method used to test the resistance of materials, products, and equipment to damp heat environments. In the damp heat test, the sample will be exposed to a high temperature and humidity environment to simulate the humid heat environment under actual application conditions. The wet heat test of components can be used to evaluate the durability, reliability, and lifespan of components, which is of great significance for the design and manufacturing of electronic products.

The damp heat test method usually includes two types: constant humidity test and cyclic humidity test. The constant humidity test involves placing the sample in a constant high temperature and humidity environment, usually at 85 ℃/85% RH (relative humidity). The cyclic humidity test involves placing the sample in alternating high temperature, high humidity, and room temperature, low humidity environments, typically at 40 ℃/95% RH and 25 ℃/50% RH.

When conducting damp heat tests, certain standards and specifications need to be followed to ensure the accuracy and reliability of the test results. Common damp heat test standards include: ASTM D2247, IEC 60068-2-30, MIL-STD-810G, GB/T 2423.3, etc. These standards specify the operating methods, sample preparation, test conditions, test time, and evaluation of test results for the damp heat test.

When conducting a damp heat test, it is necessary to pay attention to some key factors to ensure the accuracy and reliability of the test results. These factors include: sample preparation and selection, control of test conditions, selection of test time, evaluation and recording of test results, etc. When preparing and selecting samples, factors such as material, size, shape, and quantity need to be considered. When controlling the test conditions, it is necessary to pay attention to the influence of factors such as temperature, humidity, air pressure, and ventilation. When selecting the test time, it is necessary to consider factors such as the application environment and lifespan requirements of the sample. When evaluating test results, it is necessary to consider indicators such as sample performance, reliability, and lifespan.

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