Corrosion Resistance of ELV-compliant Mid- and Low/Mid-Phosphorus Electroless Nickel

摘要

Mid- and low/mid- phosphorus electroless nickel (EN) deposits exhibit good resistance to corrosive media. Due to regulations in recent years (i.e., ELV, WEEE, RoHS), many new mid- and low/mid- phosphorus EN processes have been introduced using alternative stabilizers in order to comply. Electrochemical testing is used to compare conventional and ELV-compliant mid- and low/mid- phosphorus deposits in acidic and neutral solutions. Results are compared to the corrosion resistance of high phosphorus EN. Differences in corrosion resistance due to bath age and deposit thickness are also investigated.