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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Hence, in most cases, the average coating thickness on an article will be greater than the speci?
NOTE 6—Electroplating on hardened high alloy and high ashm steels can reduce the fatigue strength of the metal parts. Therefore, the coating thickness will have to exceed the speci?
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. Microscopical method Coulometric method Nondestructive Methods: The test is very sensitive to the super?
Rejection and Rehearing 9.
ASTM B – 97()e1 Standard Specification for Electroplated Engineering Nickel Coatings
In case of dissatisfaction with the results of a test, the producer or supplier may make a claim for a rehearing. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Nickel thickness generally exceeds 5? Allow 10 min contact time for the test period see Annex A2. Remove the papers at the end of the contact period, and place at once into solution C.
Finishes that show imperfections during subsequent manufacturing operations may be rejected. Just before use, immerse the dry?
In addition, the average adtm thickness on articles will vary from article to article within a production lot. NOTE 8—The coating thickness requirements of this speci? Variation in the coating thickness from point to point on a coated article is an inherent characteristic of the electroplating process.
ASTM B (Reapproved )_百度文库
Current edition approved Feb. The purchaser may similarly require that a report of the test results be furnished. This standard has been approved for use by agencies of the Department of Defense. Also, reduction in the fatigue life of nickel-electroplated steels can be reduced by considering the relations among the variables that in? For example, a low-carbon steel specimen may represent a brass article when the magnetic thickness test is used Test Method B Contact marks shall be minimized in size and frequency.
ASTM B 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?
Three standards, Test Method BGuide Band Methods B contain sampling plans that are designed for the sampling inspection of coatings. 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.
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. When contacts must be located on signi? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Understanding ASTM B 689 Engineering Nickel Coatings
However, these are not normal in the treatment steps preceding the application of the? NOTE 2—The thickness of the electrodeposit in holes, corners, recesses, and ast areas where thickness cannot be controlled under normal electroplating conditions shall be speci? 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 b869 general size and shape.
The size of the sample and the criteria of compliance are determined by the application of statistics. The inspection lot is then classi?
Link to Active This link will always route to the current Active version of aatm standard. Shot qstm of signi? Additives required for pH control shall be noncorrosive to nickel and shall be approved by the purchaser, for example, pH can be adjusted by introducing CO2 or by additions of H2SO4 or acetic acid, or NaOH. Test Method B X-ray is instrument-dependent with regard to accuracy with increasing nickel thicknesses.
NOTE 9—Some contemporary packaging materials may emit fumes that are deleterious to the surface of the coating. When they are desired they must be stated in the purchase order see 5.