Summary for nickel plated aluminum scratches Discussion
Nickel plated aluminum scratch detection is the main issue in this thread: Michael Gartland asks how to tell whether handling scratches on Al6061 with electroless Ni plating per ASTM B733-04 have gone through to the aluminum, and what touch-up options exist if they have. The excerpt provided contains only the question, so no answerer’s guidance is available here. Gartland notes the scratches may have occurred anywhere in the handling process and is weighing possible repairs such as Iridite for better cosmetics but less durability, Super Koropon for better aluminum protection but poorer appearance, and selective nickel plating for good appearance but difficult thickness control. Because no replies are shown, the page mainly frames the practical decision: first verify scratch depth, then choose a repair method based on whether cosmetic match or corrosion protection matters more.
Q. Hi, I have an Al6061 with electroless Ni plating per ASTM B733-04, Type II, SC1, Class 1. We have noticed scratches on the finish after some handling by our technicians. We are not sure were along the way the scratches occurred.
1. Is there an easy way to detect if the scratches expose the underlying Aluminum vs. being only a surface level scratch to the Nickel plating?
2. Are there any recommended touch up options if the scratches go down to the Aluminum? Ideas we are considering are Iridite (better cosmetic, less robust than EN plating), Super Koropon (poor cosmetic, good protection of Al), and selective Ni plating (good cosmetic, poor thickness control)
Michael Gartland
Mechanical Engineer – Philadelphia, PA
March 5, 2025