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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This temperature shall be maintained during the min test period. At the end of the test period, remove the part from the hot water, and allow the part to drain and dry. The buyer and the 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.
Also, reduction in the fatigue life of nickel-electroplated steels can be reduced by considering the relations among the variables that in? Astmm thickness generally exceeds 5? Test Method B contains four sampling plans, three for use with tests that are non-destructive and one when they are destructive.
ASTM B Black spots and red rust indicate basis metal corrosion or porosity. Guide B provides a large number of plans and also gives guidance in the selection of a plan. Codeposition of particles in nickel matrices, for example, silicon carbide, mica, thoria 1, 3, 4, 5 Nickel thickness generally exceeds ?
Metal parts shall undergo pre- and post-coating treatments to reduce the risk of hydrogen embrittlement, and peening. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in b69 standard. Contact marks shall be minimized in size and frequency.
Therefore, the coating thickness will have to exceed the speci? It is recommended that the speci? NOTE 6—Electroplating on hardened high alloy and high carbon astmm can reduce the fatigue strength of the metal parts.
The specimen should duplicate the characteristics of the article that in? NOTE 10—Test specimens often are used to represent the coated articles in a test if the articles are of a size, shape, or material that is not suitable for the test, or if it is preferred not to submit articles to a destructive test because, for example, the articles are expensive or few in number.
Cobalt salts are sometimes added to the plating solution to produce harder nickel alloy deposits. This must be considered if the parts will be subjected to repeated applications of complex load patterns in service. NOTE 14—When both destructive and non-destructive tests exist for the measurement satm a characteristic, the purchaser needs to state which is to be used so that the proper sampling plan is selected. Nickel Alloys; Chapter 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.
Rejection shall be reported to the producer or supplier promptly, and in writing. The criterion of acceptance is that thickness on the specimen that corresponds to the required thickness on the article.
If you feel that your comments have not received a fair hearing you should make your b6899 known to the ASTM Committee on Ast, at the address shown below.
Electronic industry and optical re? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. When necessary, the signi?
Nonmagnetic Coatings on Magnetic Basis Metals. This abstract is a brief summary of the referenced standard. 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. 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.
NOTE 4—Good adhesion of electroplated nickel to stainless steels and high alloy steels usually requires a preliminary strike of electrodeposited nickel. The boundaries of electroplating that cover only a portion of the surface shall, after?
For the effect of such additives, see Section 4 and Annex A3.
It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Remove the papers at the end of the contact period, and place at once into solution C.