EN Coating and Chemical Resistance



Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Q. Is an electroless nickel coating chemically resistant to a solution of cyanide? C.O.

A. The chemical resistance of an electroless nickel coating depends on the makeup of the coating and the solution concentration that it is exposed to. Generally speaking, electroless nickel coatings that are rich phosphorus usually have lower rate of material loss compared to those that have a low concentration of phosphorus. Some data that I found indicates that an electroless nickel coating containing approximately 12 percent phosphorus when exposed to a 5 percent solution of sodium cyanide will lose less than 12.5 microns per year.

Additional information about the chemical resistance of various types of electroless nickel solutions can be found in the book “Electroless Nickel Plating” by Wolfgang Riedel. While the book is more than 20 years old, it is still an excellent source of information on EN. The book is available on Amazon. 

Related Topics


  • Stripping of Plated Finishes

    The processes, chemicals and equipment, plus control and troubleshooting.

  • Plating Q&A: Can you color stainless steel?

    Our expert, Art Kushner, says yes, you can color stainless steel, but it is not a process that is typically performed in a plating shop. Read more about his answer.

  • Masking for Surface Finishing

    Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.