ASTM B Standard Specification for Autocatalytic (Electroless) Nickel- Phosphorus Coatings on Metal. This specification covers requirements for. A S T M BENGL W Ob T A U 4Tb – m AMERICAN origioauy published as B direct responsibility of Subcommittee B Advanced Plating Technologies, a Milwaukee, Wisconsin company, provides electroless nickel plating per MIL-C, ASTM B and AMS as well as.
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Proceed to Checkout Continue Shopping. Standards Subsctiption may be the perfect solution. This standard does not purport to address all of the safety concerns, if any, associated with its use. The location of rack or wire marks in the coating shall be agreed upon between the producer and purchaser. As the voice of the U. In all cases, the duration of the heat treatment shall commence from b7333-97 time at which the whole of each part attains the specied temperature.
NOTE 2—The performance of the autocatalytic nickel coating depends to a large asttm on the surface nish of the article to be plated and how it was pretreated. Your Alert Profile lists the documents that will be monitored.
This standard is astj available to be included in Standards Subscriptions. It is characterized by industrial atmosphere exposure on steel substrates in dry or oiled environments. These coatings are used in applications requiring abrasion and wear resistance. When specied in the purchase order or contract, a report of the test results shall be furnished.
For Class 2 coatings, the microhardness shall equal or exceed a minimum of HK or equivalent Vickers see 4. The pH of the aerated water should asm 6.
Care should be taken to control the humidity between tests.
To reface the wheels use CS discs from Taber. If an alternate test is specied it shall be agreed upon between the producer and the purchaser.
Test Method B can be used only for coating requirements that have a numerical limit, such as coating thickness. Sufficient time must be allowed for large parts to reach oven temperature. NOTE 19—Aerated water is prepared by bubbling clean b733-997 air through distilled water by means of a glass diffusion disk at room temperature for 12 h.
The tests for these qualication requirements shall be performed monthly or more frequently.
Use the test methods described in 9. For maximum accuracy, a minimum coating thickness of 75 m is recommended. The atm is examined for blistering or other evidence of poor adhesion at 43 magnication. The conversion of Vickers to Knoop using Tables E is not recommended. Additional requirements for internal stress, purity, and elongation may be necessary for some applications.
The test method, the duration of the test, and number of allowable spots per unit area shall be specied see section 5. The rhombic Knoop indenter gives higher hardness readings than the square-base pyramidal Vickers diamond indenter for to g loads, see Ref 6. The corrosion resistance of the coating to a specic liquid medium can be determined by means of immersion tests see Practice G 31 or electrochemical test see Practices G 5 and G 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.
Make sure that the surfaces measured are smooth, clean, and dry. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. The following analysis wavelength lines have been used with minimum interference to determine the alloy.
The test is performed by rotating a plated panel under rotating rubber wheels and weighing the panel after each cycles for weight loss. A number in parentheses indicates the year of last reapproval.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. High phosphorus deposits may require longer time or a higher temperature, or both. If they do not, Test Method B identies the plan to be used.
Rough, non uniform surfaces require thicker coatings than smooth surfaces to achieve maximum corrosion resistance and minimum porosity. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.
Typical environments would include acid solutions, elevated temperature and pressure, hydrogen sulde and carbon dioxide oil service, high-temperature chloride systems, very severe wear, and marine immersion. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. NOTE 14—To protect the edges, electroplate the specimens with a minimum b73-397 5 m of nickel or copper prior to cross sectioning. The instrument must be calibrated with standards having the same composition as the coating.
Please first verify your email before subscribing to alerts. Specication B may be consulted for a list of post treatments that are widely used.
They are also used for the salvage of worn or mismachined parts.