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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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.
A superscript epsilon e indicates an editorial change since the last g689 or reapproval. The thickness specimen need not be carried through the complete process with the represented article.
Black spots and red rust indicate basis metal corrosion or porosity.
Bright Nickel Plating
If not, it shall be introduced into the process at asgm point where the coating is applied and it shall be carried through all steps that have a bearing on the b6889 thickness. When necessary, aztm signi? Also refer to Guide B for more information. 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 underplates in contacts or interconnectionsand in certain joining applications.
Historical Version s – view previous versions of standard. 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. Microscopical method Coulometric method Nondestructive Methods: Test Method B X-ray is instrument-dependent with regard to accuracy with increasing nickel thicknesses.
Visual defects are de? 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.
Therefore, the coating thickness xstm have to exceed the speci? Identify the substrate material by alloy identi? The recommended practices for the preparation of and electroplating on stainless steels and nickel alloys are given in Practices B and Brespectively. When contacts must be located on signi? The test must yield a numerical value and certain statistical requirements must be met.
ASTM B – 97()e1 – Standard Specification for Electroplated Engineering Nickel Coatings
The buyer and seller may agree on the plan or plans to be used. The specimen should duplicate the characteristics of the article that in? 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.
NOTE 3—When a deposit of controlled thickness is required in holes, corners, recesses, and similar areas, special racking, auxiliary anodes or shielding will be necessary.
Understanding ASTM B 689 Engineering Nickel Coatings
Type 1, coatings electroplated from solutions 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.
Finishes that show imperfections during subsequent manufacturing operations may be rejected. Stress relieving after stripping is not necessary if the stripping is done anodically in an alkaline solution.
Hence, in most cases, the average coating thickness on an article will be greater than the speci? Nickel Alloys; Chapter Test Method B contains four sampling plans, three for use with tests that are non-destructive and one when they are destructive. For the effect of such additives, see Section 4 and Annex A3. Electrodeposited nickel that is to be? Contact marks shall be minimized in size and frequency. This standard has been approved for use by agencies of the Department of Defense.
Remove the papers at the end of the contact period, and place at once into solution C.
Industry Sector or Speci? At the end of the test period, remove the part from the hot water, and allow the part to drain and dry. Cobalt salts are sometimes added to the plating solution to produce harder nickel alloy deposits.
If they do not, Test Method B identi? The buyer and the seller may agree on the plan or plans to be used. The procedure is known as sampling inspection. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
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 Nickel thickness generally exceeds ? The test is very sensitive to the super? NOTE 8—The coating thickness requirements of this speci?
If they do not, Methods B identi?