4 Sep ASTM B 标准 – Designation: B – 97 Standard Specication for Autocatalytic (Electroless) Nic. Designation: B – 04 Standard Speci?cation for Autocatalytic (Electroless) Nickel-Phosphorus Coatings on Metal 1 This standard is issued under the?xed. Advanced Plating Technologies, a Milwaukee, Wisconsin company, provides electroless nickel plating per MIL-C, ASTM B and AMS as well as.
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This standard does not purport to address all of the safety concerns, if any, associated with its use. They are also used for the salvage of worn or mismachined parts. Deposits nickel uniformly – on any part geometry due to no current density distribution inherent in b373 processes.
The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment. Nonmagnetic Coatings on Magnetic Basis Metals. Per B paragraph 6.
Electroless Nickel Plating (MIL-C, ASTM B, AMS ) – US Chrome
All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. Astk Nickel plating ENalso known as autocatalytic nickel, is a micro crystalline to amorphous, hardenable nickel-phosphorous alloy coating. Excellent corrosion resistance – dependent on phosphorous content hours per ASTM B are typical.
The coatings covered here are alloys of nickel and phosphorus produced by self-sustaining autocatalytic chemical reduction with hypophosphite. These coatings are used in applications requiring abrasion and wear resistance. Please fill out this brief form to access the free PDF download of U. It offers a good barrier coating corrosion resistance.
This specification establishes the requirements for autocatalytic electroless nickel-phosphorus coatings applied from acidic aqueous solutions to metallic products for use in engineering functions operating at elevated temperatures. They are used on beryllium and titanium parts for low stress properties.
Since no high or low current densities exist, a very uniform thickness of deposits over irregular shapes can be achieved. Durability good – but wear resistance is less than hard chromium. Historical Version s – view previous versions of standard.
ASTM B Class 3 post heat treatment vs. ASTM B embrittlement relief
These coatings are asmt in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions. They are also used for the salvage of worn or mismachined parts. Link to Active This link will always route to the current Active version of the standard. For many applications electroless nickel plating is applied as a barrier coating under Hard Chromium to provide the ultimate in corrosion and wear resistance.
I astn that if I ask a plater to plate a part per a specification, the least I can do is read the specification and give them all of the ordering information they need to plate our parts per the specification.
Call now or email. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit. Visit our Resource Library for Design Recommendations. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. Coatings with phosphorus contents greater than Thickness shall be assessed either by microscopical method, a magnetic induction instrument, beta backscatter method, a micrometer, weigh-plate-weigh method, coulometric method, or X-ray spectrometry.
What is the answer to the Heat Treatment vs. Yes, I would like a representative to contact me. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions.
And porosity shall be inspected either by ferroxyl test, boiling water test, aerated water test, or alizarin test. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit. Active view current version of standard.
Which of these would be performed first? The coatings are grouped into the following classification systems: February 24, — apologies, finishing. If I am coating primarily for corrosion protection, I can select a class 3 post heat treatment to improve adhesion and to provide for hydrogen embrittlement relief.
They are used on beryllium and titanium parts for low stress properties. This abstract is a brief summary of the referenced standard. After submitting, you’ll be able to save the document locally.