ASTM B656-91 PDF


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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The use of the beta backscatter method is restricted to basis metals that have an atomic number less than 18 or greater than The stress relief heat asgm can reduce the hardness of some alloys and should therefore be reviewed by all parties before processing see 5.

Report the percent boron and alloying elements if present in the coating.

The post treatment steps are designed to reduce the potential for hydrogen embrittlement, increase the adhesion of the coating to the substrate, improve the fatigue properties of the part sand increase the wear resistance and hardness of the coating: Using a calibrated Vernier microscope, examine the thickness of the deposit and average over 10 readings using Test Method B 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.

Test Method B contains four zstm plans, three for use with tests that are nondestructive and one for use with tests that are destructive. Originally approved in NOTE 3—Microscopic metallographic sectioning is dependent on the sample preparation. Rejection shall be reported to the producer promptly in writing.


Government requirements, if any see Section NOTE 4—Usually, when a collection of coated parts the inspection lot; see 9. They are referenced for information only: Method B can be used asttm for coating requirements that have a numerical limit, such as coating thickness.

Electroless Nickel |

If they do not, Method B identi? The size of the sample and the criteria of compliance are determined by the application of statistics. NOTE 2—The density of the coating will decrease as the mass percent boron in the coating increases. This standard does not purport to address the safety problems associated with its use. From the results of the analysis calculate a fraction of the boron or alloying element divided by the total of boron, nickel, and alloying element.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Ask for rush delivery. In the as-plated condition the deposit consists of a b65-91 amorphous mixture of nickel and boron with a hardness of about HKN.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. The alloy produced shall be aztm the range speci?

Astm b656-91 pdf

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The wheels shall be loaded with g with the vacuum on high for the entire test. 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 6b56-91 their own responsibility.


Ensure that the specimen is at the same temperature for each b656-9 and that the surface measured is smooth.

Astm b pdf The coating shall meet a maximum wear rate which is speci? Test Method BGuide Band Method B contain b65-691 plans that are designed for the sampling inspection of coatings. Their columnar structure, however, is bene?

The test is performed on a rotating plated panel that is abraded by b656-911 rotating rubber wheels. Last previous edition approved in as B — 91 The results should be averaged without the? When Guide B is speci?

Asgm must be exercised whenever high strength steel is processed to ensure minimal exposure and timely relief treatment. The panel is weighed before and after each cycles for weight loss asym. 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.