High-precision smearing method for small-area silicone rubber test piece

The invention relates to a high-precision dirt coating method for a small-area silicon rubber test piece. The method comprises the following steps: S1, preparing components of artificial dirt, S2, obtaining the mass m of the artificial dirt, and adding water and stirring to form an artificial dirt solution, S3, treating the silicon rubber test piece, S4, carrying out ultrasonic vibration and dirt coating treatment, and S5, storing the test piece. The method has the advantages that the components of the artificial dirt are prepared according to the hydrophobic performance of the insulator in S1, so that better simulation can be realized, in S2, the difficulty of directly weighing the dirt with too small mass is avoided by a method of preparing the solution by multiplied mass m and then averagely taking out the solution, the experimental operation is simplified, the experimental error is reduced, and the experimental efficiency is improved. And S4, scattering dirty particles by adopting an ultrasonic vibration