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 following analysis wavelength lines have been used with minimum interference to determine the alloy. Please note that b373-04 shown is for minimum thickness. NOTE 17—Appropriate test specimens are strips approximately 25 to 50 mm wide, to mm long and 3 to 6 mm thick. Uniform thickness is achieved on all surfaces where solution makes continuous contact.
If an alternate test is speci? Then remove the part, air dry, and examine for rust spots, which indicate pores. The program involved plating When required, one of the following tests can be used on the plated part or specimen.
With thermal treatment on aluminum b7330-4 copper beryllium alloys that are not react to thermal treatment. Please first verify your email axtm subscribing to alerts. ASTM International takes no position respecting the validity of any patent rights asserted in connection with asrm item mentioned in this standard.
Originally approved in The thickness of the coating and the treatments is displayed in the tables below: Coatings with phosphorus contents greater than Service Condition 0 0. NOTE 10—Usually, when a collection of coated parts the inspection lot 8. Articles to be stripped should be clean and free of oils and surface debris that may interfere with the stripping process.
Rough, non uniform surfaces require thicker coatings than smooth surfaces to achieve maximum corrosion resistance and minimum porosity. Guide B provides a large number of plans and also gives guidance on the selection of a plan.
When this occurs, the steel or copper plated article is removed, rinsed, electrocleaned, rinsed, and returned to the stripper. NOTE 14—To b733-004 the edges, electroplate the specimens with a minimum of 5? Electroless nickel, as opposed to other electrolytic coatings, does not require current or anodes.
Rounding of the test results due to the precision of the limits provides for an effective limit of 4. Deposits that are less than 7. These bb733-04 are heated and generally remove the deposit at a slower rate than nitric acid.
The heat treatment temperature was considerably higher than typical processing and was chosen to evaluate the formation of diffusion products of iron, nickel and phosphorus. 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:.
Need more than one copy? For example, coating with a test result for phosphorus of 9. Santa Clara Plating Co. Standards Subscriptions from Atm provides a money-saving, multi-user solution for accessing standards. The corrosion resistance of the coating to a speci? They are used on beryllium and titanium parts for low stress properties.
Electroless Nickel Plating
Guide B contains a list of post treatments, procedures, limitations, and guidelines that are permitted to be used to reduce the effects of hydrogen embrittlement. This is because there is some substrate removal each time the article is stripped. The hardness of CS wheels can change with time and can effect the reproducibility of results see Test Method D Typical environments include light-load lubricated wear, indoor corrosion protection to prevent rusting, and for soldering and mild abrasive wear.
These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit. This standard does not purport to address all of the safety concerns, if any, associated with its use.
Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
Type I and IV deposits are subject to greater structural variation and their properties are less predictable. This is always a good practice when dealing with high value copper alloy articles.
This standard has been approved for use by agencies of the Department of Defense. 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. NOTE 1—Due to the precision of some phosphorus analysis methods a deviation of 0. The chemical makeup of the plating solution and the use of the solution can affect the porosity and corrosion resistance of the deposit.
Electroless Nickel Coating
After 4 min contact, 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. The coating shall meet a maximum wear rate which is speci?
If you feel that your comments have not received a fair hearing you should b733-4 your views known to the ASTM Committee on Standards, at the address shown below. Current edition approved Aug.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions.