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How to analyze the adhesion between coating and substrate for printing board

2020-11-15 13:47:00
The adhesion of printing board coating and substrate is simply understood as the adhesion between coating and substrate. Whether the adhesion is good or not is related to the performance and effect of the product.
The adhesion between the coating and the substrate directly affects the adhesion of the coating. Therefore, the chemical treatment state of the substrate surface also directly affects the bonding degree between the coating and the substrate (how to clean the printing board). A good pretreatment process can produce a stable conversion film on the substrate surface, which can not only improve the corrosion resistance of the substrate, It can also improve the adhesion between the substrate and the coating.
The results show that different pretreatment process has obvious influence on the aging performance of the coating. The formulation and process parameters of different pretreatment suppliers are different, so the cleanliness of grease on the substrate surface, the corrosion degree of the substrate by cleaning agent, the toughness of the conversion film itself, and the anti-corrosion elements in the conversion film will have a great impact on the aging performance of the coating.
Therefore, in order to improve the adhesion between the printing board coating and the substrate, the selection of pre-treatment process is very important, and then the selection of coating and topcoat should also be appropriate.

next chapter：How to locate the gauge thickness of printing board

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