ASTM B() Standard Specification for Autocatalytic (Electroless) Nickel-Phosphorus Coatings on Metal Scope This . This ASTM B standard specification covers the requirements for electroless nickel-phosphorous coatings on metal. For more details call us. The procedure in our factory is carried out according to: AMS-C, or ASTM B The thickness of the coating and the treatments is displayed in the tables.
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When required, one of the following tests can be used on the plated part or specimen.
Test specimens are available from Taber. Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. This standard is not included in any packages. Go to main content. Matrix effect due to the distribution of phosphorus in layers of the coating also effect the measurement accuracy and require that calibration standards be made under the same conditions as the production process.
As the stripping process proceeds, a corrosion product may form on the surface which will slow the stripping. B b73304 04 Standard Speci? The test is performed by rotating a plated panel under rotating rubber wheels and weighing the panel after each cycles for weight loss.
Electroless Nickel Coating
Please call us 7b33-04 if you don’t see your specification listed here. Need more than one copy? Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. Please first verify your email before subscribing to alerts.
As the deposit nears complete removal, it is common for a slight etch of the substrate to occur.
They are also used for the salvage of worn or mismachined parts. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment.
B7333-04 coatings are used in applications requiring abrasion and wear resistance. Care should be taken to control the humidity between tests.
For coatings requiring alloy analysis and corrosion testing weekly sampling should be considered as an option. The precipitation of these high phosphorus deposits may be delayed for several minutes in the mid-range temperatures.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
The pH of the aerated water should be 6. We can also help with your design to ensure RoHS compliance. After coating and if speci? Conversions of Vickers or Knoop hardness number to Rockwell C is not recommended. After 4 min contact, apply astj acetic acid until the violet atm disappears. Rejection and Rehearing For maximum accuracy, a minimum coating thickness of 75? The thickness of the coating and the treatments is displayed in the tables below: The corrosion resistance of the coating to a speci?
The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit. Test Method B contains several plans and also gives instructions for calculating plans to meet special needs.
Electroless Nickel Plating
The tensile strength shall be supplied by the purchaser. Applications include requirements for diffusion barrier, undercoat, electrical conductivity and wear and corrosion protection in specialized environments.
This is because there is some substrate removal each time the article is stripped. If an alternate test is speci? Rough, non uniform surfaces 7b33-04 thicker coatings than smooth surfaces to achieve maximum corrosion resistance and minimum porosity.
NOTE 16—This method is only recommended for deposits in the as-plated condition.