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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Service Condition 0 0. 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. 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.
NOTE 12—Inductively coupled plasma techniques can determine the alloy to within 0. 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. When processing some copper or steel alloys, it is advisable to apply a copper undercoat that will prevent the attack of the substrate was the stripping nears completion. The coating shall meet a maximum wear rate which is speci?
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
Insertion of a sharp probe at the interface of the coating and basis metal to determine the adhesion is suggested. After 4 min contact, asttm glacial acetic acid until the violet color disappears.
Type I and IV deposits are subject to greater structural variation and their properties are less predictable. NOTE 16—This method is only recommended for deposits in the as-plated condition. Typical environments would include acid solutions, elevated temperature and pressure, hydrogen sul?
Electroless Nickel Plating
We will check for issues with solution entrapment and other design concerns. Current edition approved Aug. Because the deposited nickel alloy is a catalyst for the reaction, the process is self-sustaining.
When this occurs, the steel or copper plated article is removed, rinsed, electrocleaned, rinsed, and returned to the stripper.
Originally approved in They are used on beryllium b733-004 titanium parts for low stress properties. They are also used for the salvage of worn or mismachined parts. Applications include requirements for diffusion barrier, undercoat, electrical conductivity and wear and corrosion protection in specialized environments.
Electroless nickel, as opposed to other electrolytic coatings, does not require current or anodes. As the stripping process proceeds, a corrosion product may form on the surface which will slow the stripping.
To reface the wheels use CS discs from Taber. Please first log in with a verified email before subscribing to alerts. For higher thicknesses, please ask for quote. Thermal treatment for adhesion improvement on ferrous alloys containing carbon and hardened aluminum. The coefficient of friction and stress of deposit are also reduced in comparison to electro-plated bright nickel.
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.
If the document is revised or amended, you will be notified by email. In cases where there is demand for different qualities than the above, a different type of electroless nickel with a lower or a higher quantity of phosphorus can be ordered. With thermal treatment on aluminum and copper beryllium alloys that are not react to thermal treatment.
These differences also effect non-destructive thickness testing by X-Ray and magnetic means. The appearance of brown spots after 2 min indicate pores.
Subscription pricing is determined by: Careful attention to the selection of TYPE will insure optimum performance of the deposit in the intended application.