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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NOTE 13—Eddy-current type instruments give erratic measurements due to variations in conductivity of the coatings with changes in phosphorus content. Need more than one copy? Rounding of the test results due to the precision of the limits provides for an effective limit of 4. Additional requirements for internal stress, purity, and elongation may be necessary for some b73397.
The tests for these qualication requirements shall be performed monthly or more frequently.
This standard is not included in any packages. The weight percent of phosphorus shall be in the range designated by type classication see 4. Also, discoloration due to heat treatment shall not be cause for rejection unless special heat treatment atmosphere is specied see section 5. Use the test methods described in 9. Conversions of Vickers or Knoop hardness number to Rockwell C is not recommended.
The program involved plating Sufficient time must be allowed for large parts to reach oven temperature. Any such defects on signicant surfaces shall be brought to the attention of the purchaser before plating. This standard has 7b33-97 approved for use by agencies of the Department of Defense. The wheels shall be loaded with g with a vacuum on high for the entire test.
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. When specied in the purchase order or contract, a report of the test results shall be furnished.
The following analysis aatm lines have been used with minimum interference to determine the alloy.
The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit. After 3 min, apply a solution of potassium ferrocyanide prepared by dissolving 1 g of potassium ferrocyanide and 1. Please first log in with a verified email before subscribing to alerts. Subscription pricing is determined by: The procedure is known as sampling inspection. 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.
Report the mean and standard deviation for the coating. The location of rack or wire marks in the coating shall be agreed upon between the producer and purchaser.
The producer shall not be responsible for coatings defects resulting from surface conditions of the metal, if these conditions have been brought to the attention of the purchaser. Rejection and Rehearing You can download and open this file to your 7b33-97 computer but DRM prevents opening this file on another computer, including a networked server.
You may delete a document from your Alert Profile at any time. The pH of the aerated water should be 6. 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. For each of the three specimens complete the following steps: Any red spots remaining indicate pores.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
Standards Subsctiption may be the perfect solution. If an alternate test is specied it shall be agreed upon between the producer and the purchaser. For example, coating with a test result for phosphorus of 9. The phosphorus content of the coating must be known to calculate the thickness of the astn.
The purchaser and producer may agree on the plan s to be used.