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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After rinsing and air drying, examine the part for blue spots, which form at pore sites. NOTE 2—The performance of the v733-97 nickel coating depends to a large extent on the surface nish of the article to be plated and how it was pretreated. Apply heat to the beaker at such a rate that the water begins to boil in not less than 15 min, nor more than 20 min after the initial application of heat.
Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. The inspection lot is then classied as complying or not complying with the requirements based on the results of the inspection sample. Properly performed this will ensure coated products of satisfactory quality and will reduce the amount of acceptance inspection.
This standard is not included in any packages. The purchaser and producer may agree on the plan s to be used. High phosphorus deposits may require longer time or a higher temperature, or both.
Users of this n733-97 are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. NOTE 10—Usually, when a collection of coated parts the inspection lot 8. This standard is subject to revision at any time by the responsible technical committee and must asmt reviewed every ve years and if not revised, either reapproved or withdrawn.
Standards Subsctiption may be the perfect solution. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for atm standards. The rhombic Knoop indenter gives higher hardness readings than the square-base pyramidal Vickers diamond indenter for to g loads, see Ref 6. For example, coating with a test result for phosphorus of 9.
This standard does not purport to address all of the safety concerns, if any, associated with its astmm. Typical environments include light-load lubricated wear, indoor corrosion protection to prevent rusting, and for soldering and mild abrasive wear.
Add to Alert PDF. Test Method B contains several plans and also gives instructions for calculating plans to meet special needs. The phosphorus content of the coating must be qstm to calculate the thickness of the deposit. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
They are also used for the salvage of worn or mismachined parts.
The conversion of Vickers to Knoop using Tables E is not recommended. Do not use gas containing hydrogen with high-strength steel parts.
In the case of dissatisfaction occurs with the results of a test, the producer may make a claim for a hearing. Report the mean and standard deviation for the coating. A suitable method shall activate the surface and remove oxide and foreign materials, which may cause poor adhesion and coating porosity. Specication B may be consulted for a list of post treatments that are widely used.
For maximum accuracy, a minimum coating thickness of 75 m is recommended. After coating and if specied, the part shall not exceed maximum dimension on signicant surface see section 5. 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.
Rejection and Rehearing After 3 min, apply a solution of potassium ferrocyanide prepared by dissolving 1 g of potassium ferrocyanide and 1. Your Alert Profile lists the documents that will be monitored. These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong b733-97 solutions.
If they do not, Test Method B identies the plan to be used. The coating b7333-97 examined for blistering or other evidence of poor adhesion at 43 magnication. Use the test methods described in 9.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
Any such defects on signicant surfaces shall be brought to the attention of the purchaser before plating. Test specimens are available from Taber. Continue to boil the water for 30 min. Proceed to Checkout Continue Shopping. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Rough, non uniform surfaces require thicker coatings than smooth surfaces to achieve maximum corrosion resistance and minimum porosity.