ASTM_B() – Designation: B – 91 (Reapproved ) and Inorganic Coatings2 B Guide for Autocatalytic (Electroless). ASTM-B, ASTM-B, Mil-CE. Services. Home · Electroless Nickel Plating · Copper Plating · Tin Plating · Silver Plating · Gold Plating · Line. astm b pdf astm b ()e1 Standard Practice for Porosity in Gold and Palladium Alloy Coatings on Metal Substrates by Vapors of Sodium Hypochlorite .
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Calculate the thickness from the increase in mass, surface area, and density of the coating. For Type 1 coatings the density is approximately 8. This standard does not purport to address the safety problems associated with its use.
The use of the beta backscatter method is restricted to basis metals that have an atomic number less than 18 or greater than The coating shall meet a maximum wear rate which is speci?
The alloy produced shall be within the range speci? The determination of mass percent boron content may be atm by an appropriate analytical method such as atomic absorption spectroscopy. The purchaser and producer may agree on the plan s to be used. The test must yield a numerical value and certain statistical requirements must be met. In Stock Need it fast? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
NOTE 3—Microscopic metallographic sectioning is dependent on the sample preparation. It can only be used for coatings of known boron content. The stress relief heat 6b56-91 can reduce the hardness of some alloys and should therefore be reviewed ast, all parties before processing see 5.
Materials and Manufacture 6. These solutions contain either an alkylamineborane or sodium borohydride as a reducing agent, a source of nickel ions, a buffer, complexant, and control chemicals.
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The inspection b6569-1 is then classi? They are nondestructive testing methods for detecting discontinuities that are open to the surface such as cracks, seams, laps, cold shuts, laminations, through leaks, or lack of fusion and are applicable to inprocess, final, and maintenance examination.
Shorter times and higher temperature can be used if the resulting loss of surface hardness is acceptable to the purchaser. Care must be exercised whenever high strength steel is qstm to ensure minimal exposure and timely relief treatment. For each of the three specimens follow X2. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Astm b656-91 pdf
The results should be averaged without the? Test Method BGuide Band Method B contain sampling plans that are designed for the sampling inspection of coatings. The test is performed on a rotating plated panel that is abraded by two atsm rubber wheels. The wheels shall be loaded with g with n656-91 vacuum on high for the entire test. Thin coatings of this type provide bondability and solderability on electronic components such as lead frames, electrical contacts, and headers.
Report the percent boron and alloying elements if present in the coating. Each lot of part s shall be sampled with the recommended procedure described in Section 9 of this speci?
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The panel is weighed before and after each cycles for weight loss determination. This standard has been approved for use by agencies of the H656-91 of Defense. In the as-plated condition the deposit consists of a predominantly amorphous mixture of nickel and boron with a hardness of about B6566-91. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned astj this standard.
The wear rate shall be speci? Imperfections in the surface of the basis material including scratches, porosity, pits, inclusions, roll and die marks, lap crack, burrs, cold shuts, and surface roughness that could adversely affect the coating should be brought to the attention of the purchaser prior to processing see 7.
Guide B provides a large number of plans and also gives guidance on the selection of a plan.
Electroless Nickel |
NOTE 2—The density of the coating will decrease as the mass percent boron in the coating increases. Analyze the solution for nickel at These test methods require a density factor to calculate the atsm. They are referenced for information only: Method B can be used only for coating requirements that have a numerical limit, such as coating thickness.