Nickel Plating Aluminum Galvanic Corrosion

I am having plating problems such as visible peeling and blistering and voiding in areas.

Nickel plating aluminum galvanic corrosion.

Galvanic corrosion some times called dissimilar metal corrosion is the process by which the materials in contact with each other oxidizes or corrodes. Electroless nickel plating can provide a robust solution to corrosive attack across a range of corrosive mechanisms including galvanic corrosion chemical attack and erosion. Galvanic corrosion is an electrochemical process in which one metal corrodes preferentially to another when both metals are in electrical contact in the presence of an electrolyte. Zangari in encyclopedia of interfacial chemistry 2018.

Note that ni is more noble than low carbon steel essentially iron and. The chart below shows how different plating materials react to one another with regard to their galvanic potential. Porosity in base metal causing plating problems february 3 2017. The plating is typically electroless nickel and then gold.

Iron group metals nickel cobalt iron nickel plating is among the most common electrodeposition processes and is used mostly as a part of a multilayered system designed to increase wear and corrosion resistance and also able to function as a diffusion barrier. Typically we are plating small precision machined housings from 6061 t6 aluminum alloy. Galvanic corrosion also called bimetallic corrosion or dissimilar metal corrosion is an electrochemical process in which one metal corrodes preferentially when it is in electrical contact with another in the presence of an electrolyte a similar galvanic reaction is exploited in primary cells to generate a useful electrical voltage to power portable devices.