ASTM B733-97 PDF
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 size of the sample and the criteria of compliance are determined by the application of statistics. The precision and bias requirements will vary for each type of test.
The inspection lot is then classied as complying b733-7 not complying with the requirements based on the results of the inspection sample. NOTE 13—Eddy-current type instruments give erratic measurements due to variations in conductivity of the coatings with changes in phosphorus content. B — 97 Standard Specication for Autocatalytic Electroless Nickel-Phosphorus Coatings on Metal 1 This standard is issued under the xed designation B ; the number immediately following the designation indicates the year of original adoption or, in the case 7b33-97 revision, the year of last revision.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
The tests for these qualication requirements shall be performed monthly or more asttm. Specication B may be consulted for a list of post treatments asstm are widely used. After 4 min ashm, apply glacial acetic acid until the violet color disappears. Fine cracks in the coating on the tension side of the bend are not an indication of poor adhesion. If an alternate test is specied it shall be agreed upon between the producer and the purchaser.
Test Method B can be used only for coating requirements that have a numerical limit, such as coating thickness. Rounding of the test results due to the precision of the limits provides for an effective limit of 4. It is characterized by industrial atmosphere exposure on steel substrates in dry or oiled environments. Originally published as B — Continue to boil the water for 30 min. The rhombic Knoop indenter gives higher hardness readings than the square-base pyramidal Vickers diamond indenter for to g loads, b73-397 Ref 6.
The wear rate shall be specied by the purchaser and agreed to by the producer. If they do not, Test Method B identies the plan to be used. For Class 2 coatings, the microhardness shall equal or exceed a minimum of HK or equivalent Vickers see 4.
NOTE 12—Inductively coupled plasma techniques can determine the alloy to within 0. Rejection shall be reported to the producer promptly in writing. Proceed to Checkout Continue Shopping. When required, one of the following tests can be used on the plated part or specimen.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
Properly performed this will ensure coated products of satisfactory quality and will reduce the amount of acceptance inspection. Three standards Test Method BGuide Band Test Method B contain sampling plans that are designed for the sampling inspection of coatings.
NOTE 14—To protect the edges, electroplate the specimens with a minimum of 5 m of nickel or copper prior to cross sectioning. NOTE 2—The performance of the autocatalytic nickel coating depends to a large extent on the surface nish of the article to be plated and how it was pretreated. Please first log in with a verified email before subscribing to alerts.
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. Also, discoloration due to heat treatment shall not be cause for rejection unless special heat treatment atmosphere is specied see section 5.
Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining. An example is leaded steel which may exhibit liquid or solid embrittlement after heat treatment.
To reface the wheels use CS discs from Taber. After rinsing and air drying, examine the part for blue spots, which form at pore sites. They b733-997 used on beryllium and titanium parts for low stress properties.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. For example, coating with a test result for phosphorus of 9. The weight percent of phosphorus shall be in the range designated by type classication see 4.
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.
Coatings with phosphorus contents greater than For maximum accuracy, a minimum coating thickness of 75 m is recommended.
Your comments are invited either for revision n733-97 this standard or for additional standards and should be addressed to ASTM International Headquarters. It will vary depending on loads, type of indenter, and operator. Users of this standard 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. Add to Alert PDF. Sufficient time must be allowed for large parts to reach oven temperature.
Your Alert Profile lists the documents that will be monitored. In the case of dissatisfaction occurs with the results of a test, the producer may make a claim for a bb733-97. The location of rack or wire marks in the coating shall be agreed upon between the producer and purchaser. The surface of the coating shall be cleaned prior to testing see Note When specied in the purchase order or contract, a report of the test results shall be furnished.
NOTE 5—Heat treatment of the base material may effect its metallurgical properties. 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. NOTE b73-97 water is prepared by bubbling clean compressed air through distilled water by means of a glass diffusion disk at room temperature for 12 h.