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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Nonmagnetic Coatings on Magnetic Basis Metals. If they do not, Methods B identi? NOTE 13—Adhesion is in? Remove the papers at the end of the contact period, and place at once into solution C. Cobalt salts are sometimes added to the plating solution to produce harder nickel alloy deposits. The procedure is known as sampling inspection.
ASTM B – 97()e1 Standard Specification for Electroplated Engineering Nickel Coatings
NOTE 15—Usually, when a collection of coated articles, the inspection lot 8. Class 5 25 50 X Minimum Nickel Thickness,? Shot peening astmm signi? Alloy processes include nickel-phosphorus and nickel-cobalt. 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.
The boundaries of electroplating that cover only a portion of the surface shall, after? The criterion of acceptance is that thickness on the specimen that corresponds to the required thickness on the article. ASTM B aetm 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 testworkmanship, and hydrogen embrittlement relief.
Just before use, immerse the dry? NOTE 12—Since many factors in? NOTE 6—Electroplating on hardened high alloy and high carbon steels can reduce the fatigue strength of the metal parts.
ASTM B This temperature shall be maintained during the min test period. Test Method B Magnetic should not be used for thicknesses less than 10? Current edition approved Feb. Methods B contains several plans and also gives instructions for calculating plans to meet special needs.
Nickel thickness generally exceeds ? Electrodeposited nickel that is to be? Last previous edition approved in as B — A test may destroy the coating but in a non-critical area; or, although it may astk the coating, a tested part can be reclaimed by stripping and recoating.
Understanding ASTM B Engineering Nickel Coatings
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. 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 4—Good adhesion of electroplated nickel to stainless steels and high alloy steels usually requires a preliminary strike of electrodeposited nickel. Rejection and Rehearing 9. Allow 10 min contact time for the test period see Annex A2.
Bright Nickel Plating
A source of oil-free air shall be available to aerate the water with agitation vigorous enough to prevent air bubbles from clinging to signi? The part fails if more than the number of pores speci? In case of dissatisfaction with the results of a test, the producer or supplier may make astn claim for a rehearing.
Imperfections and variations in appearance in the coating that arise from surface conditions of the basis metal scratches, pores, roll marks, inclusions, etc. For the effect of such additives, see Section 4 and Annex A3. NOTE 14—When both destructive and non-destructive tests asstm for the measurement of a characteristic, the purchaser needs to state which is to be used so that b6899 proper sampling plan is selected.
Adhesion tests may at times fail to detect adhesion failure; subsequent fabrication may reveal poor or inadequate adhesion, which shall be cause for rejection.
Nickel thickness generally exceeds 5? 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.
Metal parts shall undergo pre- and post-coating treatments to reduce the risk of hydrogen embrittlement, and peening.