Why PPGI Steel Coil Needs To Test Adhesion?

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In the production process of ppgi steel coil, how should we judge the quality of ppgi coil? Testing the adhesion of ppgi steel coil is an important indicator.

This is because the time for the coating adhesion of ppgi steel coil to take effect is affected by the coating performance and the conversion film performance between the coating and the substrate of ppgi coil. The main influencing factors are the quality of the coating and the pretreatment state of the substrate.

• T-bend test of PPGI Steel Coil

At present, the detection method used by various manufacturers is basically to detect the coating adhesion of ppgi steel coil through T-bend test. There is a general understanding in the industry about the aging performance of the coating adhesion of ppgi coil, that is, as the storage time increases, the coating adhesion of ppgi steel coil will rapidly deteriorate, thus affecting the normal use of ppgi coil.

The test results of the T-bend test also confirmed this phenomenon from the experimental data. The experimental data show that the main factors causing the continuous decline in the coating adhesion performance of ppgi steel coil come from moisture, oxygen and ions in the natural environment. They have a slow impact on the quality of ppgi coil, so many customers find that the coating adhesion aging performance is poor after receiving the ppgi steel coil, and even the coating falls off.