Electroless Nickel

Electroless Nickel
MIL-C-26074D
AMS-2404 & 2405
ASTM-B-656 & B-733

Epner Technology is a pioneer in the development of Electroless Nickel Phosphorous alloy with two distinct applications:  Optical Performance and Corrosion Resistance. 

If the application is for subsequent optical polishing then the nickel is plated with an intentionally reduced deposition rate to produce an amorphous deposit that is totally pit-free, pore-free, a nickel quality that in some hands has been able to yield a polished surface roughness of less than 10 angstroms rms

When corrosion resistance is the requirement, particularly on aluminum, then a specific level of phosphorous is maintained to be the most corrosion resistant ratio.  ETI is proud to have been apart of a Rockwell Collins study to produce what is now on their drawings as, CREN (Corrosion Resistant Electroless Nickel).  Our aerospace customers are free to utilize this unique body of knowledge that was developed in conjunction with this Cedar Rapids based company some ten years ago.  The full report, funded by the Airforce, is available under certain conditions.

Electroless Nickel on AlBeMet Adhesion and Bend Tests
Electroless Nickel on AlBeMet Adhesion and Bend Tests

Epner Technology, as part of a test assessment effort, electroless nickel plated onto AlBeMet 162H coupons IAW AMS 2404.  This was done on multiple groups of coupons on separate baths to show consistency.  Coupons were subsequently bend tested and all specimens met the Bend Test Requirements of ASTM B571 per Epner.  

In addition when coupons were received at Boeing, Material and Processing performed an inspection on the bent parts, also bent/broke some fresh coupons and plating met requirements.  In addition per the specification, a sharp blade was used to try and peel under plating and assess adhesion..  

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By The Boeing Company
Design Considerations
Examples