ASTM B656-91 PDF

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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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Care should be taken to control the humidity between tests as recommended by the equipment manufacturer. To maintain solderability, these coatings are generally not heat treated. Shorter times and higher temperature can be used if the resulting loss of surface hardness is acceptable to atm purchaser. In Stock Need it fast? If they do not, Test Method B identi? For each of the three specimens follow X2.

It is the astk of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Electroless Nickel |

Users of this standard are expressly advised that determination of axtm validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. A number in parentheses indicates the year of last reapproval.

The instrument shall be calibrated with specimens having the same basis material and coating composition as the part s. The results should be averaged without the?

Last previous edition approved in as B — 91 Exposure of the parts to hydrogen sources will generally induce the condition.

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Astm b656-91 pdf

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. They are referenced for information only: The size of the sample and the criteria of compliance are determined by the application of statistics. Test Asstm BGuide Qstmand Method B contain sampling plans that are designed for the sampling inspection of coatings.

Materials and Manufacture 6. 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: When Guide Zstm is speci?

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.

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If they do not, Method B identi? Duration of the test is cycles and it can be extended to 25 cycles. This technique measures the mass per unit area of the coating applied over the substrate and is displayed as thickness.

A test specimen or part, processed in a manner that duplicates the characteristics of production parts, shall be produced and used in these tests.

Care must be exercised whenever high strength steel is processed to ensure minimal exposure and timely relief treatment. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Government requirements, if any see Section This standard has been approved for use by agencies of the Department of Defense.

The variation of boron content also affects the quantity and structure of nickel boride precipitated during heat treatment. In the case of dissatisfaction with the results of a test, the producer may make a claim for a rehearing.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Their columnar structure, however, is bene? Current edition approved Sept.

B — 91 Reapproved Standard Speci? The coating shall meet a maximum wear rate which is speci?

Analyze the solution for nickel at