The Electrochemical Deposition of Tin-Nickel Alloys and the CorrosionProperties of the Coating

摘要

Tinickel (65/35 wt.%) is a unique coating process because of the deposition of an intermetallicrnphase of nickel and tin, which cannot be formed by any pyrometallurgical process. Fromrnthermodynamic calculations it can be shown that intermetallic phases can be formed throughrnelectrodeposition. The alloy has unique corrosion properties and shows surface passivation likernstainless steel. The coating is decorative and non-allergic to the skin and can replace decorativernnickel and nickel-chromium coatings in many cases and decrease the risk for allergic contactrndermatitis. A number of electrochemical tests, including polarization curves, chronoamperometricrnstudies and tribocorrosion tests have been performed to show the consequence of replacingrnnickel coatings with tinickel coatings.