ASTM B Standard Specification for Autocatalytic (Electroless) Nickel- Phosphorus Coatings on Metal. This specification covers requirements for. A S T M BENGL W Ob T A U 4Tb – m AMERICAN origioauy published as B direct responsibility of Subcommittee B 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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The appearance of brown spots after 2 min indicate pores. Test Method B contains four sampling plans, three for use with tests that are nondestructive and one for use with tests that are destructive.
The coating is examined for blistering or other astn of poor adhesion at 43 magnication. NOTE 11—The autocatalytic nickel process is dynamic and a daily sampling is recommended.
Last previous edition B — 90 Do not use gas containing hydrogen with high-strength steel parts. Guide B provides a large number of plans and also gives guidance on the selection of a plan. After coating and if specied, the part shall not exceed maximum dimension on signicant surface see section 5. They are used on beryllium and titanium parts adtm low stress properties. Test Method B contains several plans and also gives instructions for calculating plans to meet b33-97 needs.
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ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
The tests for these qualication requirements shall be performed monthly or more frequently. Three standards Test Method B b33-97, Guide Band Test Method B contain sampling plans that are designed for the sampling inspection of coatings.
The coating shall meet a maximum wear rate which is specied by the purchaser and agreed to by the producer.
Additional requirements for internal stress, purity, and elongation may be necessary for some applications. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit.
To reface the wheels use Asrm discs from Taber. N733-97 rhombic Knoop indenter gives higher hardness readings than the square-base pyramidal Vickers diamond indenter for to g loads, see Ref 6. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Please first verify your email before subscribing to alerts.
The surface of the coating shall be cleaned prior to testing see Note NOTE 19—Aerated water is prepared by bubbling clean compressed air through distilled water by means of a glass diffusion disk at room temperature for 12 h. Individual alloys should be tested for maximum hardness attainable, especially for conditions of lower temperatures and longer times.
The wheels shall be loaded with g with a vacuum on b733-997 for the entire test. The use of a statistical regimen to establish the control limits and frequency of analysis may be employed to ensure quality deposits are produced. The instrument must be calibrated with standards having the same composition as the coating. This standard is not included in any packages.
A g load is recommended. Report the mean and standard deviation for the coating.
A number in parentheses indicates the year of last reapproval. Add to Alert PDF.
Please first log in with a verified email before subscribing to alerts. Fine cracks in the coating on the tension side of the bend are not an indication of poor adhesion.
Users of this standard are expressly advised adtm determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Materials and Manufacture 6.
The instrument shall be calibrated with deposits plated in the same solution under the same conditions on magnetic steel.