ASTM B() Standard Specification for Autocatalytic (Electroless) Nickel-Phosphorus Coatings on Metal Scope This . This ASTM B standard specification covers the requirements for electroless nickel-phosphorous coatings on metal. For more details call us. The procedure in our factory is carried out according to: AMS-C, or ASTM B The thickness of the coating and the treatments is displayed in the tables.
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The tests for these quali? With thermal treatment on aluminum and copper beryllium alloys that are not react to thermal treatment. This is always a good practice when dealing with high value copper alloy articles.
Typical environments would include acid solutions, elevated temperature and pressure, hydrogen sul? This standard is also available to be included in Standards Subscriptions. Bb733-04 14—To protect the edges, electroplate the specimens with a minimum of v733-04 This standard does not purport to address all of the safety concerns, if any, associated with its use.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Electroless Nickel Plating
Further, hydrogen embrittlement relief baking for at least 3 hours is required after plating on b733-04 that have been h733-04 to a hardness above Rockwell C This standard does not purport to address all of the safety concerns, if any, associated with its use. B — 04 Standard Speci? NOTE 9—The thickness of the coating cannot be controlled in blind or small diameter deep holes or where solution circulation is restricted.
NOTE 11—The autocatalytic nickel process is dynamic and a daily sampling is recommended. The Electroless nickel processes in our plant are medium phosphorus electroless nickel and high phosphorus electroless nickel, where the main characters of this processes are: The use of a statistical regimen to establish the control limits and frequency of analysis may be employed to ensure quality deposits are produced.
Deposit properties of Electroless Nickel far exceed those of electro-plated atm nickel. 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.
Sufficient time must be allowed for large parts to reach oven temperature. NOTE 10—Usually, when a collection of coated aztm the inspection lot 8.
Electroless Nickel Coating
Use the test methods described in 9. The thickness of the coating and the treatments is displayed in the tables below:. High phosphorus deposits may require longer time or a higher temperature, or both.
The thickness of the coating and the treatments is displayed in the tables below: Careful selection of the pre and post heat treatments are recommended. NOTE 18—On thick 75? Test Method B contains several plans and also gives instructions for calculating plans to meet special needs.
Careful attention to b7330-4 selection of TYPE will insure optimum performance of the deposit in the intended application. The coating is examined for blistering or other evidence of poor adhesion at 43 magni?
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
NOTE 2—The performance of the autocatalytic nickel coating depends to a large extent on the surface? These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions. The test is performed by rotating a plated panel under rotating rubber wheels and weighing the panel after each cycles for weight loss. Type I and IV deposits are subject to greater structural variation and their properties are less predictable.
They are used on beryllium and titanium parts for low stress properties. Insertion of a sharp probe at the interface of the coating and basis metal to determine the adhesion is suggested. Articles to be stripped should be clean and free of oils and surface debris that may interfere with the stripping process. These coatings are used in applications requiring abrasion and wear resistance. The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
The commercially available strippers that have minimal attack of the substrate are available to minimize the risk of etching or pitting of the substrate. The results should be averaged without the? After 4 min contact, apply glacial acetic acid until the violet color disappears.
After coating and if speci? 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.
The chemical and physical properties of the deposit vary primarily with its phosphorus content and subsequent heat treatment.
Rough, non uniform surfaces require thicker coatings than smooth surfaces to achieve maximum corrosion resistance and minimum porosity. Subscription pricing is determined by: As the voice of the U.
You can download and open this file to your own n733-04 but DRM prevents opening this file on another computer, including a networked server.
Any such defects on signi? It is also referred to as an autocatalytic process. Coatings with phosphorus contents greater than The size of the sample and the criteria of compliance are determined by the astmm of statistics. For maximum accuracy, a minimum coating thickness of 75?
The location of rack or wire marks in the coating shall be agreed upon between the producer and purchaser.