ASTM B689 PDF

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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Oil-free air pressure may be used to speed the drying. 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.

Understanding ASTM B 689 Engineering Nickel Coatings

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.

Class 5 25 50 X Minimum Nickel Thickness,? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

Codeposition of particles in nickel matrices, for example, silicon carbide, mica, thoria 1, 3, 4, 5 Nickel thickness generally exceeds ?

Bright Nickel Plating

The purchaser may similarly require that a report of the test results be furnished. Variation in the coating thickness from point to point on a coated article is an inherent characteristic of the electroplating process. 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.

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When contacts must be located on signi?

Originally approved in The procedure is known as sampling inspection. NOTE 6—Electroplating on hardened high alloy and high carbon steels can reduce the fatigue strength of the metal parts. This must be considered if the parts will be subjected to repeated applications of complex load patterns in service. Guide B provides a large number of plans and also gives guidance in the selection of a plan.

Visual defects are de?

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? There are practical limits to nickel thickness and uniformity of thickness distribution caused by the size and geometric con? It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.

Metal parts shall undergo pre- and post-coating treatments to reduce the risk of hydrogen embrittlement, and peening. Electrodeposited nickel that is to be?

Nonmagnetic Coatings on Magnetic Basis Metals. In addition, the average coating thickness on articles will vary from article to article within asfm production lot.

ASTM B Nickel Coating | General Metal Finishing

When they are desired they must be stated in the purchase order see 5. Shot peening of signi? 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 aatm. The criterion of acceptance is that thickness on the specimen that corresponds to the required thickness on the article. Black spots and red rust indicate basis metal corrosion or porosity. ASTM B The size of the sample and the criteria of compliance are determined by the application of statistics.

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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 testb69, and hydrogen embrittlement relief.

Microscopical method Coulometric method Nondestructive Methods: Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.