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.
|Published (Last):||24 May 2014|
|PDF File Size:||7.78 Mb|
|ePub File Size:||14.99 Mb|
|Price:||Free* [*Free Regsitration Required]|
Already Subscribed to this document. Test Method B contains four sampling plans, three for use with tests that are nondestructive and one for use with tests that are destructive.
Properly performed this will ensure coated b733–97 of satisfactory quality and will reduce the amount of acceptance inspection.
If the document is revised or amended, you will be notified by email. Coatings with phosphorus contents greater than Rough, non uniform surfaces require thicker coatings than smooth surfaces to achieve maximum corrosion resistance and minimum porosity.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Your comments are invited either for revision of this standard or for additional standards and should be addressed astk ASTM International Headquarters.
Specication B may be consulted for a list of post treatments that are widely used. The following analysis wavelength lines have been used with minimum interference to determine the alloy. After 3 min, apply a solution of potassium ferrocyanide prepared by dissolving 1 g of potassium ferrocyanide and 1. When specied in the purchase order or contract, a report of the test results shall be furnished.
Awtm use of a statistical regimen to establish the control limits and frequency of analysis may be employed to ensure quality deposits are produced.
It is characterized by industrial atmosphere exposure on steel substrates in dry or oiled environments.
We have no amendments or corrections for this standard. Make three closely spaced indentations and examine under magnication for aking or blistering of the coating, which is cause for rejection.
Test specimens are available from Taber. Current edition approved July 10, NOTE 7—The length of time to reach maximum hardness varies with the phosphorus content of the deposit.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
The rhombic Knoop indenter gives higher hardness readings than the square-base pyramidal Vickers diamond indenter for to g loads, see Ref 6. The test is performed by rotating a plated panel under rotating rubber wheels and weighing the panel after each cycles for weight loss.
Insertion of a sharp probe at the interface of the coating and basis metal to determine the adhesion is suggested. Originally published as B — Additional requirements for internal stress, purity, and elongation may be necessary for some applications. Continue to boil the water for 30 min.
The coating shall meet a maximum wear rate which is specied by the purchaser and agreed to by the producer. This standard is also available to be included in Standards Subscriptions. A number in parentheses indicates the year of last reapproval.
NOTE 13—Eddy-current ashm instruments give erratic measurements due to variations in conductivity of the coatings with changes in phosphorus content. Make sure that the surfaces measured are smooth, clean, and dry. For example, coating with a test result for phosphorus of 9. Also, b73-397 due to heat treatment shall not be cause for rejection unless special heat treatment atmosphere is specied see section 5.
NOTE 4—The purchaser should furnish separate test specimens or coupons of the basis metal for test purposes to be plated concurrently with the articles to be plated see 8. They are sstm on beryllium and titanium parts for low stress properties. Last previous edition B — 90 The surface of the coating shall be cleaned prior to testing see Note These coatings are used in applications requiring abrasion and wear resistance.
They are zstm used for the salvage of worn or mismachined parts. A superscript epsilon e indicates an editorial change since the last revision or reapproval. NOTE 5—Heat treatment of the base material may effect its metallurgical properties.