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 pH of the water shall be maintained between 6.
The test selected should take into consideration the size, shape, or thickness of the part. The test is very sensitive to the super?
Additives required 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 of H2SO4 or acetic acid, or NaOH. This abstract is a brief summary of the referenced standard. Visual defects are de? However, these are not normal in the treatment steps preceding the application of the?
Historical Version s – view previous versions of standard. Guide B provides a large number of plans and also gives guidance in the selection of a plan. When they are desired they must be stated in the purchase order see 5. Thickness measurements with the microscopical method can show large differences on these rough pro?
Understanding ASTM B Engineering Nickel Coatings
Type 1, coatings astn from aastm not containing hardeners, brighteners, or stress control additives; Type 2, electrodeposits used at moderate temperatures, and contain sulfur or other codeposited elements or compounds that are present to increase the hardness, refine grain structure, or control internal stress; and Type 3, electroplates containing dispersed submicron particles such as silicon carbide, tungsten carbide, and aluminum oxide that are present to increase hardness and wear resistance at specified temperatures.
This specification covers the requirements for electroplated nickel coatings applied to metal products for engineering applications for example, for use as a buildup for mismachined or worn partsfor electronics applications including as v689 in contacts or interconnectionsand in certain joining applications.
If they do not, Test Method B identi? When electroplated nickel is required to have higher hardnesses, greater wear resistance, certain residual stress values and certain leveling characteristics, sulfur and other substances are incorporated in the nickel deposit through the use of certain addition agents in the electroplating solution. It is recommended that the speci?
Methods B can b869 used only for coating requirements that have numerical limit, such as coating thickness. The recommended practices for the preparation of and electroplating on stainless steels and nickel alloys are given in Practices B and H689respectively. NOTE 13—Adhesion is in? Methods B contains several plans and also gives instructions for calculating plans to meet special needs.
Identify the asttm material by alloy identi? The procedure is known as sampling inspection. Current edition approved Feb. Coatings shall be available in any one of the following types: The inspection lot is then classi? Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Industry Sector or Speci? Allow 10 min contact time for the test period see Annex A2. 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?
Originally approved in ashm Typical mechanical properties of nickel electroplated from these baths, and the combined effect of bath operation and solution composition variables on the mechanical properties of the electrodeposit are given in Guide B NOTE 6—Electroplating on hardened high alloy and high carbon steels can reduce the fatigue strength of the metal parts.
In aastm of dissatisfaction with the b6899 of a test, the producer or supplier may make a claim for a rehearing. The specimen should duplicate the characteristics of the article that in?
Metal parts shall undergo pre- and post-coating treatments to reduce the risk of hydrogen embrittlement, and peening. Electrodeposited nickel that is to be?
Bright Nickel Plating
Nonmagnetic Coatings on Magnetic Basis Metals. Coatings wstm 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 bb689 testworkmanship, and hydrogen embrittlement relief.
NOTE 8—The coating thickness requirements of this speci? Therefore, if all of the articles in a production lot are to meet the thickness requirement, the average coating thickness for the production lot as a whole will be greater that the average necessary to assure that a single article meets the requirement. Stress relieving after b6889 is not necessary if the stripping is done anodically in an alkaline solution.
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.