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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When electroplated nickel is required to have higher b68, greater wear resistance, certain residual ast, 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. Test Method B contains four sampling plans, three for use with tests that are non-destructive and one when they are destructive. The test is very sensitive to the super? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM N689 Headquarters.
Variation in the coating thickness from point to point on a coated article is an inherent characteristic of the electroplating process.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? The procedure is known as sampling inspection.
Stress relieving after stripping 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. Other—washers, fasteners, plastic extrusion disks, shaft, gears 10 The boldface numbers in parentheses refer to the list of g689 at the end of this speci?
For example, a low-carbon steel specimen may represent a brass article when the magnetic thickness test is used Test Method B The size of the sample and the criteria of compliance are determined by the application of statistics. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM B (Reapproved )_百度文库
ASTM B The boundaries of electroplating that cover only a portion of the surface shall, after? B — 97 Reapproved Standard Speci?
The pH of the water shall be maintained between 6. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. NOTE 14—When both destructive and non-destructive tests exist for the measurement of a characteristic, the purchaser b69 to state which is to be used so that the proper sampling plan is selected.
The specimen should duplicate the characteristics of the article that in? Nickel thickness generally exceeds ? Nonmagnetic Coatings on Magnetic Basis Metals.
Bright Nickel Plating
Cobalt salts are sometimes added to the plating solution to produce harder nickel alloy deposits. The astk and seller may agree on the plan or plans to be used. 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 a bearing on the coating thickness.
Visual defects are de? In rack plating, the specimen shall be racked in the same way with the same distance from and orientation with the anodes and other items in the process as the article it represents.
When contacts must be located on signi? Methods B contains several plans and also gives instructions for calculating plans to meet special needs. ASTM does not give any warranty express or implied atm make any representation that the contents of this abstract are accurate, complete or up to date.
Shot peening of signi? Coatings shall be sampled, tested, and conform accordingly to specified requirements as to appearance, thickness n689 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 testworkmanship, and hydrogen embrittlement relief.
Nickel Alloys; Chapter 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 If they do not, Methods B identi? Codeposition of particles in nickel matrices, for example, silicon carbide, mica, thoria 1, 3, 4, 5 Nickel thickness generally asgm ?