ASTM B (Reapproved )_能源/化工_工程科技_专业资料。 Designation: B – 97 (Reapproved ) Standard Speci?cation for. This ASTM B specification covers the requirements for electroplated nickel coatings applied to metal products for engineering applications. Bright Nickel Plating. ASTM B, AMS-QQ-N bright nickel plated electrical components. At APP we do bright nickel plating, it is widely used for decorative.
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The criterion of acceptance is that thickness on the specimen that corresponds to the required thickness on the article.
However, these are not normal in the treatment steps preceding the application of the? Allow 10 min contact time for the test period see Annex Satm.
The size of the sample and the criteria of compliance are determined by the application of statistics. Asfm having a hardness greater than 35 HRC equivalent to a tensile strength of MPa or greater that have been acid-stripped for recoating shall be rebaked for embrittlement relief see 6. Visual defects are de?
Bright Nickel Plating
Just before use, immerse the dry? Adhesion tests may at times fail to detect adhesion failure; subsequent fabrication may reveal poor or inadequate adhesion, which shall be cause for rejection. Remove the papers at the end of the contact period, and place at once into solution C. A test may destroy the coating but in a non-critical area; or, although it may destroy the coating, a tested part sstm be reclaimed by stripping and recoating.
There are practical limits to nickel thickness and uniformity of thickness distribution asmt by the size and geometric con? It is recommended that the speci?
NOTE 2—The thickness of b6689 electrodeposit in holes, corners, recesses, and other areas where thickness cannot be controlled under normal electroplating conditions shall be speci? Nonmagnetic Coatings on Magnetic Basis Metals. Historical Version s – view previous versions of standard. The purchaser may similarly require that a report of the test results be furnished. Also, reduction in the fatigue life of nickel-electroplated steels can be reduced by considering the relations among the variables that in?
Nickel B89 Chapter Methods B contains several plans and also gives instructions for calculating plans to meet special needs. Electrodeposited nickel that is to be?
Bright Nickel Plating Service per ASTM B & AMS-QQ-N | Accurate Precision Plating
ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. For the effect of such additives, see Section 4 and Annex A3. 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.
If not, it shall be introduced into the process at the point where the coating is applied and it shall be carried through all steps that have n689 bearing on the coating thickness.
NOTE 11—When special test specimens are used to represent coated articles in a thickness test, the specimens will not necessarily have the same thickness and thickness distribution as the articles unless the specimens and the articles are of the same general size and shape. The aatm and seller may agree on the plan or plans to be used.
In case of dissatisfaction with the results of a test, the producer or supplier may make a claim for a rehearing. Black spots and red rust indicate basis metal corrosion or porosity. NOTE 3—When a deposit of controlled thickness is required in holes, corners, recesses, and similar areas, special b68, auxiliary anodes or shielding will be necessary.
Understanding ASTM B Engineering Nickel Coatings
The procedure is known as sampling inspection. At the end of the test period, remove the part from the hot water, and allow the part to drain and dry.
NOTE 9—Some contemporary packaging materials may emit fumes that are deleterious to the surface of the coating. Other—washers, fasteners, plastic extrusion disks, shaft, gears 10 The boldface numbers in parentheses refer to the list of references at the end of this speci?
Cobalt salts are sometimes added to the plating solution to produce harder nickel b89 deposits.
This standard has been approved for use by agencies of the Department of Defense. Three standards, Test Method BGuide Band Methods B contain sampling plans that are designed for the sampling inspection of coatings. A number in parentheses indicates the year of last reapproval. For the effect of such additives, see Section 4 and Annex A3. NOTE 14—When astk destructive and non-destructive tests exist for the measurement of a characteristic, the purchaser needs to state which is to be used so that the proper sampling plan is selected.
In addition, the average coating thickness on articles will vary from article to article within a production lot. The test is very sensitive to the super? Nickel thickness generally exceeds 5? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Coatings shall be available in any one of the following types: The recommended practices for the preparation of and electroplating on stainless steels and nickel alloys are asym in Practices B and Brespectively.