Extrusion & Post
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Insufficient pre-treatment before chemical plating of PBT products
Fenómeno del problema
The surface activation treatment before chemical plating (copper and nickel plating) of PBT products is not in place, and the coating adhesion is poor.
Análisis de la causa
The PBT surface is very inert and requires sufficient roughening treatment (chromic acid etching); the pre-treatment conditions (temperature, time, concentration) are improperly controlled.
Solución
Optimize the roughening and etching process parameters (chromic acid-sulfuric acid system); ensure sufficient water washing; control the concentration of the activation solution.
Conclusión clave
PBT chemical plating pre-treatment is the key to bonding force.
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