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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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 would need to check with your customer first before going down that route.
The chemical and physical properties of the deposit vary primarily with its phosphorus adtm and subsequent heat treatment. Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining.
Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. Per B paragraph b7333.
It offers a good barrier coating corrosion resistance. All information presented is for general reference and does not represent a professional opinion nor the policy of an author’s employer. It’s not possible to diagnose a finishing problem or the hazards of an operation via these pages.
What is the answer to the Heat Treatment vs. Link to Active This link will always route to the current Active version of the standard. Durability good – but wear resistance is less than hard chromium.
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 also used for the salvage of worn or mismachined parts.
They are used on beryllium and titanium parts for low stress properties.
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. Adhesion shall be examined either by bend, impact, or thermal shock tests.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. They are used on beryllium and titanium parts for low stress properties. Coatings with phosphorus contents greater than Nonmagnetic Coatings on Magnetic Basis Metals. Guide ASTM B is a qstm 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.
The coatings covered here are alloys of nickel and phosphorus produced by self-sustaining autocatalytic chemical reduction with hypophosphite.
Electroless Nickel Plating (MIL-C, ASTM B, AMS ) – US Chrome
Electroless nickel is generally applied to a thickness range of 25 to microns 0. Historical Version s – view previous versions of standard. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit.
Since no high or low current densities exist, a very uniform thickness of deposits over irregular shapes can be achieved. Let’s say that this plating has a Class 2 requirement Heat Treat for Hardnessand it also needs Wstm Embrittlement relief. Yes, I would like a representative to contact me.
Excellent corrosion resistance – dependent on phosphorous content hours per ASTM B are typical. So, generally it is hydrogen embrittlement relief bake first and heat treatment second. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit.
Coatings with phosphorus contents greater than I’m an engineer trying to write good drawing notes for plating requirements. After submitting, you’ll be able to save the document locally. Link to Active This link will b373 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.