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Plating on Plastics Part Ⅱ: Pretreatment, Mechanism of Adhesion
Author(s): 
Pages: 26-31
Year: Issue:  2
Journal: ELECTROPLATING & FINISHING

Keyword:  mechanism of adhesionetchingchromosulfuric acid solutionpermanganate etchpre-treatment;
Abstract: Depositing metal onto a polymer surface requires that the metal is able to be deposited there (and nowhere else) and that it adheres. Even the Greek philosopher Plato wrote about adhesion. Today, we know about the factors influencing adhesion although we mostly are not able to get quantitative data. From experiments we can see that electrostatic forces have the greatest influence. Depending on the nature of the polymers to be plated, special pretreatment is therefore necessary to make a plastic′s surface receptive for the first plating step and help to achieve sufficient adhesion between surface and metal. While sometimes quite aggressive methods like chromosulphuric acid are necessary to attack the polymer surface, looking for less dangerous and environmentally friendly systems has started long time ago.
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