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):||19 May 2008|
|PDF File Size:||2.94 Mb|
|ePub File Size:||9.96 Mb|
|Price:||Free* [*Free Regsitration Required]|
As the voice of the U.
The tests for asrm qualication requirements shall be performed monthly or more frequently. Current edition approved July 10, Add to Alert PDF.
The size of the sample and the criteria of compliance are determined by the application of statistics. Last previous edition B — 90 It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine h733-97 applicability of regulatory limitations prior to use. After 3 min contact, rinse, and apply a solution of alizarin sulfonate prepared by dissolving 1.
The wear rate b73-97 be specied by the purchaser and agreed to by the producer. The use of a statistical regimen to establish the control limits and frequency of analysis may be employed to ensure quality deposits are produced.
If the document is revised or amended, you will be notified by email.
Already Subscribed to this document. 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 NOTE 9—The thickness of the coating cannot be controlled in blind or small diameter deep holes or where solution circulation is restricted. The hardness of CS wheels can change with time and can effect the reproducibility of results see Test Method D The conversion of Vickers qstm Knoop using Tables E is not recommended.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
When specied in the purchase order or contract, a report of the test results shall be furnished. It is characterized by industrial atmosphere exposure on steel substrates in dry or oiled environments. In the case of dissatisfaction occurs with the results of a test, the producer may make a claim for a hearing.
The pH of the aerated water should be 6.
These differences also effect non-destructive thickness testing by X-Ray and magnetic means. Properly performed this will ensure coated products of satisfactory quality and will reduce the amount of acceptance inspection. This specification covers requirements for autocatalytic electroless nickel-phosphorus coatings applied from aqueous solutions to metallic products for engineering axtm uses. Then aastm the part, air dry, and examine for rust spots, which indicate pores.
Any such defects on signicant surfaces shall be brought to the attention of the purchaser before plating. A g load is recommended.
In all cases, the duration of the heat treatment shall commence from the time at which the whole of each part attains the specied temperature. Test Method B contains several plans and also gives instructions for calculating plans to meet special needs.
The instrument must be calibrated with standards having the same composition as the coating. Table 3 describes the heat treatment for maximum hardness. 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. Test specimens are available from Taber.
The procedure is known as sampling inspection. NOTE 12—Inductively coupled plasma techniques can determine the alloy to within 0. 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.
The asfm Knoop indenter gives higher hardness readings than the square-base pyramidal Vickers diamond indenter for to g loads, see Ref 6. Your comments will receive careful consideration at a meeting of the n733-97 technical committee, which you may attend. The test is performed by rotating a plated panel under rotating rubber wheels and weighing the panel after each cycles for weight loss. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit.
The weight percent of phosphorus shall be in the range designated by type classication see 4. Careful attention to the selection of TYPE will insure optimum performance of the deposit in the intended application.
Please first log in with a verified email before subscribing to alerts. Matrix effect due to the distribution of phosphorus in layers astn the coating also effect the measurement accuracy and require that calibration standards be made under the same conditions as the production process.
You may delete a document from your Alert Profile at any time. The coating is examined for blistering or other evidence of poor adhesion at 43 magnication. These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions. 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 location of rack atsm wire marks in the coating shall be agreed upon between the producer and purchaser. The program involved plating NOTE 16—This method is only recommended b7733-97 deposits in the as-plated condition. Proceed to Checkout Continue Shopping. NOTE 1—Due to the precision of some phosphorus analysis methods a deviation of 0. Materials and Manufacture 6. Sufficient time must be allowed for large parts atsm reach oven temperature.