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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Last previous edition approved in as B — This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Identify the substrate material by alloy identi? Allow 10 min contact time for the test period see Annex A2. Coatings shall be available in any one of the following types: This must b6899 considered if the parts will be subjected to repeated applications b69 complex load patterns in service.
It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Coatings shall be sampled, tested, and conform accordingly to specified requirements as to appearance, thickness measured either destructively by microscopical or coulometric method, or nondestructively by magnetic or X-ray methodadhesion examined either by bend, file, heat and quench, or push testporosity assessed either by hot water, ferroxyl, or flowers of sulfur test sstm, workmanship, and hydrogen embrittlement relief.
If you feel that your comments have not received b69 fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. A test may destroy the coating but in a non-critical area; or, although it may destroy the coating, a tested part can be reclaimed by stripping and recoating. The pH of the water shall be asrm between 6.
Methods B can be used only for coating requirements that have numerical limit, such as coating asfm. NOTE 4—Good adhesion of electroplated nickel to stainless steels and high alloy steels usually requires a preliminary strike of electrodeposited nickel.
The buyer and seller may agree on the plan or plans to be used.
Electrodeposited nickel that is to be? Contact marks shall be minimized in size and frequency. It is recommended that the speci? At the end of the test period, remove the part from the hot water, and allow the part to drain and dry. The test g689 yield a numerical value and certain statistical requirements b6899 be met. 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.
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. NOTE 6—Electroplating on hardened high alloy and high carbon steels can reduce the fatigue strength of the metal parts.
For example, a low-carbon steel specimen may represent a brass article when the magnetic thickness test is used Test Method B NOTE 13—Adhesion is in? This temperature shall be maintained during the min test period.
Understanding ASTM B Engineering Nickel Coatings
Rejection and Rehearing 9. Visual defects are de? The inspection lot is then classi? Industry Sector or Speci?
Understanding ASTM B 689 Engineering Nickel Coatings
Type 2 nickel coatings produced with certain organic additives can exhibit signi? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. This standard has been approved for use by agencies of the Department of Defense. 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.
Test Method B contains four sampling plans, three for use with g689 that are non-destructive and one when they are destructive. NOTE 9—Some contemporary packaging materials may emit fumes that are deleterious to the surface of the coating.
Link to Active This link will always asgm to the current Active version of the standard. Cobalt salts are sometimes added to b698 plating solution to produce harder nickel alloy deposits. In addition, the average coating thickness on articles will vary from article to article within a production lot.
NOTE 2—The thickness of the electrodeposit in holes, corners, recesses, and other areas where thickness cannot be controlled under normal asrm conditions shall be speci? This abstract is atsm brief summary of the referenced standard. Remove the papers at the end of the contact period, and place at once into solution C.
The test selected should take into consideration the size, shape, or thickness of the part. Originally approved in Guide B provides a large number of plans and also gives guidance in the selection of a plan. B — 97 Reapproved Standard Speci? Adhesion asttm may at times fail to detect adhesion failure; subsequent fabrication may reveal poor or inadequate adhesion, which shall be cause for rejection.
Current edition approved Feb. Nickel Alloys; Chapter Additives awtm for pH control shall be noncorrosive to nickel and shall be approved by the purchaser, for example, pH can be adjusted by introducing CO2 or by additions ashm H2SO4 or acetic acid, or NaOH.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The procedure is known as sampling inspection.
Class 5 25 50 X Minimum Nickel Thickness,? The size of astj sample and the criteria of compliance are determined by the application of statistics.
In case of dissatisfaction with the results of a test, the producer or supplier may make a claim for a rehearing. NOTE 3—When a deposit of controlled thickness is required in holes, adtm, recesses, and similar areas, special racking, auxiliary anodes or shielding will be necessary. ASTM B Therefore, the coating thickness will have to exceed the speci?