Revision: 2004
Finish: Nickel
Company: ASTM
Application: This specification covers requirements for autocatalytic (electroless) nickel-phosphorus coatings applied from aqueous solutions to metallic products for engineering (functional) uses. The coatings are alloys of nickel and phosphorus produced by autocatalytic chemical reduction with hypophosphite. Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. The chemical and physical
Appearance: Metallic
Plate Thickness: Specified on drawing
Strike Thickness: None specified
Notes: The coatings are generally deposited from acidic solutions operating at elevated temperatures. The coatings have multifunctional properties, such as
hardness, heat hardenability, abrasion, wear and corrosion resistance, magnetics, electrical conductivity provide diffusion barrier, and solderability. They are also used for the salvage of worn or mismachined parts. The low phosphorus (2 to 4 % P) coatings are microcrystalline and possess high as-plated hardness (620 to 750 HK 100). These coatings are used in applications requiring abrasion and wear resistance. Lower phosphorus deposits in the range between 1 and
3 % phosphorus are also microcrystalline. These coatings are used in electronic applications providing solderability, bondability,increased electrical conductivity, and resistance to strong alkali solutions. The medium phosphorous coatings (5 to 9 % P) are most widely used to meet the general purpose requirements of wear and corrosion resistance. The high phosphorous (more than 10 % P) coatings have superior salt-spray and acid resistance in a wide range of
applications. They are used on beryllium and titanium parts for low stress properties. Coatings with phosphorus contents greater than 11.2 % P are not considered to be ferromagnetic.
The information provided within the Advanced Plating Technologies’ database is for reference only and is not intended to be a comprehensive summary of any specification’s content. Rather the database was designed to provide a brief summary of the specification’s subject matter to provide a sound context of the specification’s contents and engineering purpose. Advanced Plating Technologies cannot guarantee that the specifications contained therein are the most current revisions. In addition, Advanced Plating has no affiliation with any of the organizations, agencies or companies contained within the database. We hope you find the APT specification database a useful online resource and value any feedback you may have. Although the data provided in this database has been obtained or adapted from sources that are believed by us to be reliable, no warranty expressed or implied is made by us regarding the accuracy, adequacy, completeness, reliability or usefulness of any data. The data is provided strictly for reference purposes. Only our standard product and service warranties apply to finished goods supplied by Advanced Plating Technologies. To the extent that any third party company or agency is identified as a data source, Advanced Plating Technologies is not associated with such company or agency and that such company or agency is not identified for purposes of advertising, endorsement or recommendation by APT. If you find any errors or omissions in the data, we encourage you to report them to us.