Nickel Plating Aluminum Galvanic Corrosion

Porosity in base metal causing plating problems february 3 2017.

Nickel plating aluminum galvanic corrosion.

Electroless nickel plating en can be applied to a wide range of basis metals including steel copper brass and aluminum alloys. Typically we are plating small precision machined housings from 6061 t6 aluminum alloy. 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. The plating is typically electroless nickel and then gold.

I am having plating problems such as visible peeling and blistering and voiding in areas. Galvanic corrosion some times called dissimilar metal corrosion is the process by which the materials in contact with each other oxidizes or corrodes. Zangari in encyclopedia of interfacial chemistry 2018. First there must be two electrochemically dissimilar metals present.

Electroless nickel plating can provide a robust solution to corrosive attack across a range of corrosive mechanisms including galvanic corrosion chemical attack and erosion. There are three conditions that must exist for galvanic corrosion to occur. 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.