GB/T 2423.54-2005 "Environmental testing of electrical and electronic products - Part 2: Test methods, Test Xc: Fluid contamination" stipulates the test method for fluid contamination of electrical and electronic products. The standard specifies the test principle, covering the type of test fluid, test conditions, operation process and result evaluation. It is used to simulate the scene of fluid contamination in actual use of products, evaluate the ability of products to resist fluid contamination, and provide technical basis for ensuring the performance and Reliability of products in complex environments.