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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Electroless Nickel plating ENalso known as autocatalytic nickel, is a micro crystalline to amorphous, hardenable nickel-phosphorous alloy coating. Since no high or low current densities exist, a very uniform thickness of deposits over irregular shapes can be achieved. 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.
It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages. The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment. Nonmagnetic Coatings on Magnetic Basis Metals. These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions.
What is the answer to the Heat Treatment vs.
These coatings are used in applications requiring abrasion and wear resistance. Link to Active This link will always route to the current Active version of the standard.
All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. It is the responsibility of the user of wstm standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Link to Active This link will always route to the current Active version of the standard. Hi Richard, If the high temperature treatment cannot be done within a reasonable time at least satm 4 hours of plating then the embrittlement relief bake needs to be done first.
I’m an engineer trying to write good drawing notes for plating requirements. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Prior to plating, substrates should be pretreated by stress relief for reducing risks of hydrogen embrittlement, peening, and racking. Some companies consider the high temperature bake as sufficient to replace the hydrogen embrittlement relief if it can be done within 4 hours, but you b373 need to check with your customer first before going down that route. 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.
The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit.
Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. They are also used for the salvage of worn or mismachined parts.
I figure 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 7b33 they need to plate our parts per the specification. And porosity shall be inspected either by ferroxyl test, boiling water test, aerated water test, or alizarin test.
February 24, — apologies, finishing. This standard does not purport to address all of the safety concerns, if any, associated with its use.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
Guide ASTM B is a better document to use as a guide to the minimum times for de-embrittlement operations, especially true when you get up the the high tensile strength or very hard materials. Call now or email. Coatings with phosphorus contents greater than USC offers a proprietary method – for applying electroless nickel to aluminum alloys.
It offers a good barrier coating corrosion resistance. They are used on beryllium and titanium parts for low stress properties. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Electroless Nickel Plating (MIL-C, ASTM B, AMS ) – US Chrome
This abstract is a brief summary of the referenced standard. Thanks for your help. The chemical and physical properties of the deposit vary primarily with its phosphorus content axtm subsequent heat treatment. They are used on beryllium and titanium parts for low stress properties.