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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The weight percent of phosphorus shall be in the range designated by type classication see 4.
Insertion of a sharp probe at the interface of the coating and basis metal to determine the adhesion is suggested. This specification covers requirements for autocatalytic electroless nickel-phosphorus coatings applied from aqueous solutions to metallic products for engineering functional uses. Coatings that show v733-97 may be rejected. The surface of the coating shall be cleaned prior to testing see Note Proceed to Checkout Continue Shopping.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Make sure that the surfaces measured are xstm, clean, and dry.
Test Method B can be used only for coating requirements that have a numerical limit, such as coating thickness. Standards Subsctiption may be the perfect solution. To reface the wheels use CS discs from Taber. The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment. If they do not, Test Method B identies the plan to be used. NOTE 4—The purchaser should furnish separate test specimens or coupons of the basis metal for test purposes to be ast, concurrently with the b73-97 to be plated see 8.
Rounding of the test results due to the precision of the limits provides for an effective limit of 4.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
After 3 min contact, rinse, and apply a solution of alizarin sulfonate prepared by dissolving 1. Make three closely spaced indentations and examine under magnication for aking or blistering of the coating, which is cause for rejection.
You may delete a document from your Alert Profile at any time. A number in parentheses indicates the year of last axtm. NOTE 17—Appropriate test specimens are strips approximately 25 to 50 mm wide, to mm long and 3 to 6 mm thick. Additional requirements for internal stress, purity, and elongation may be necessary for some applications. Already Subscribed to this document.
The coating is examined for blistering or other evidence of poor adhesion at 43 magnication. The location of rack or wire marks in the coating shall be agreed upon between the producer and purchaser. NOTE 10—Usually, when a collection of coated parts the inspection lot 8. Typical environments would include acid solutions, elevated temperature and pressure, hydrogen sulde and carbon dioxide oil service, b73-397 chloride systems, very severe wear, and marine immersion. It will vary depending on loads, type of indenter, and operator.
Matrix effect due to the distribution of phosphorus in layers of the coating also effect the measurement accuracy and require that calibration standards be made under the same conditions as the production process. After 3 astj, apply a solution of potassium ferrocyanide prepared by dissolving 1 g of potassium ferrocyanide and 1.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Individual alloys should be tested for maximum hardness attainable, especially for conditions of lower temperatures and longer times.
Rejection and Rehearing NOTE 19—Aerated water is prepared by bubbling clean compressed air through distilled water by means of a glass diffusion disk at room temperature for 12 h. Care should be taken to control the humidity between tests. For Coatings requiring alloy analysis and corrosion testing weekly sampling should be considered as an option. 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.
Do not use gas containing hydrogen with high-strength steel parts. Test specimens are available from Taber.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. An inspection lot shall be dened as a collection of coated parts which are of the same kind, that have been produced to the same specication, that have been coated by a single producer at one time or approximately the same time under essentially identical conditions, and that are submitted for acceptance or rejection as a group. The following analysis wavelength lines have been used with minimum interference to determine the alloy.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The corrosion bb733-97 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 7b33-97 A suitable method shall activate the surface and remove oxide and foreign materials, which may cause poor adhesion and coating porosity.
Subscription pricing is determined by: When Guide B is specied, the purchaser and producer need to agree on the plan to be used. An example is leaded steel which may exhibit liquid or solid embrittlement after heat treatment. Use the test methods described in 9.
A g load is recommended. The tests for these qualication requirements shall be performed monthly or more frequently.
Avoid rapid heating and cooling of plated parts.