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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If they do not, Test Method B identi? Thickness measurements with the microscopical method can show large differences on these rough pro? Class 5 25 50 X Minimum Nickel B6899
The inspection lot is then classi? 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. 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.
ASTM B – 97()e1 Standard Specification for Electroplated Engineering Nickel Coatings
Rejection shall be reported to the producer or supplier promptly, and in writing. NOTE 12—Since many factors in?
This abstract is a brief summary of the referenced standard. 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.
The pH of the water shall be maintained between 6. This temperature shall be maintained during the min test period. It is recommended that the speci? NOTE 6—Electroplating on hardened high alloy and high carbon steels can reduce the fatigue strength of the metal parts.
Bright Nickel Plating
The part fails if more than the number of pores speci? Originally approved in Guide B provides a large number of plans and also gives guidance in the selection of a plan. 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.
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.
ASTM B689 – 97(2018)e1
Additives required for pH control shall be noncorrosive to nickel and shall be approved by the b69, for example, pH can be adjusted by introducing CO2 or by additions of H2SO4 or acetic acid, or NaOH.
The thickness specimen need not be carried through the complete process with the represented article. ASTM B rp Contact marks shall astj minimized in size and frequency. Nickel thickness generally exceeds 5? For the effect of such b698, see Section 4 and Annex A3. NOTE 4—Good adhesion of electroplated nickel to stainless steels and high alloy steels usually requires a preliminary strike of electrodeposited nickel.
Just before use, immerse the dry? Hence, asttm most cases, the average coating thickness on an article will be greater than the speci? The test selected should take into consideration the size, shape, or thickness of the part. Coatings shall be available in any one of the following types: The boundaries of electroplating that cover only a portion of asfm surface shall, after?
For example, a low-carbon steel specimen may represent a brass article when the magnetic thickness test is used Test Method B NOTE 14—When both destructive and non-destructive tests exist for the measurement of a characteristic, the purchaser needs to state which is to be used so that the proper sampling astj is selected.
It is noncorrosive to nickel. Methods B can be used only for coating requirements that have numerical limit, such as coating thickness. 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 necessary.
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?
ASTM B – 97()e1 – Standard Specification for Electroplated Engineering Nickel Coatings
Adhesion tests may at times fail to detect adhesion failure; subsequent fabrication may reveal poor or inadequate adhesion, which shall be cause for rejection. Alloy processes include nickel-phosphorus and nickel-cobalt. ASTM B Electronic industry and optical re?
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. 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.
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 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.
For the effect of such additives, see Section 4 and Annex A3. Variation in the coating thickness from point to point on a coated article is an inherent characteristic of qstm electroplating process. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Black spots and red rust indicate basis metal corrosion or porosity. The procedure is known as sampling inspection. Historical Version s – view previous versions of standard. The buyer and seller may agree on the plan or plans to be used. The purchaser may similarly require that a report of the test results be furnished.