Abstract:
A conversion coating composition and a method of applying the conversion coating composition to magnesium and magnesium alloy articles prior to painting to prevent corrosion. The conversion coating composition comprises a source of vanadate ions, a material comprising phosphorus, and nitric acid or a source of nitrate ions. In addition, the composition may also contain boric acid or a source of borate ions and a source of fluoride ions or a source of fluoroborate ions.
Abstract:
Un método para metalizar un sustrato de polímero que comprende las etapas de: a) tratamiento de superficie del sustrato de polímero con un tratamiento con plasma o de superficie de descarga corona; b) acondicionar y grabar el sustrato de polímero con una solución de grabado que comprende un hidróxido y paladio iónico; c) activar el sustrato de polímero con paladio iónico; d) reducir el paladio sobre el sustrato de polímero; e) colocar una capa de níquel no electrolítico sobre el sustrato de polímero preparado; y f) colocar una capa de cobre no electrolítico sobre la capa de níquel no electrolítico.
Abstract:
Un artículo sometido a electrodeposición selectiva que comprende: a) una primera parte de plástico que comprende un veneno catalítico disperso uniformemente en la misma que inhibe la electrodeposición no electrolítica sobre la primera parte de plástico; y b) una segunda parte de plástico que es receptiva a la electrodeposición no electrolítica sobre la misma y que tiene una capa de electrodeposición de metal no electrolítico depositada sobre la misma; en el que la primera parte de plástico está libre de electrodeposición de metal no electrolítico, caracterizado por que el veneno catalítico es ácido yodobenzoico.
Abstract:
The present invention is directed to an improved method for metallizing polymer substrates, such as polyimides. The present invention comprises the steps of surface treating the polymer substrate with a plasma jet or corona discharge surface treatment, conditioning and etching the polymer substrate with an etching solution comprising a hydroxide and ionic palladium, activating the polymer substrate with ionic palladium, reducing the palladium on the polymer substrate, plating an electroless nickel layer onto the prepared polymer substrate, arid plating an electroless copper layer over the electroless nickel layer. The process of the invention provides an improved method for preparing the polymer substrate for subsequent electrolytic plating thereon.
Abstract:
An improved colloidal activator is disclosed which is useful in preparing substrates for plating. The activator comprises a source of gold, a source of tin and an organic sulfonic acid. The colloidal activator may also include colloid stabilizers. A method for preparing and a process for using the activator are also disclosed.
Abstract:
A conversion coating composition and method of applying the conversion coating composition to magnesium and magnesium alloy articles prior to painting to prevent corrosion. The conversion coating composition comprises a source of vanadate ions, a material comprising phosphorus, and nitric acid or a source of nitrate ions. In addition, the composition may also contain boric acid or a source of borate ions and a source of fluoride ions or a source of fluoroborate ions.
Abstract:
The present invention is directed to an improved method for metallizing polymer substrates, such as polyimides. The present invention comprises the steps of surface treating the polymer substrate with a plasma jet or corona discharge surface treatment, conditioning and etching the polymer substrate with an etching solution comprising a hydroxide and ionic palladium, activating the polymer substrate with ionic palladium, reducing the palladium on the polymer substrate, plating an electroless nickel layer onto the prepared polymer substrate, and plating an electroless copper layer over the electroless nickel layer. The process of the invention provides an improved method for preparing the polymer substrate for subsequent electrolytic plating thereon.