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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For Class 2 coatings, the microhardness shall equal or exceed a minimum of HK or equivalent Vickers see 4.
ASTM B Specification | Electroless Nickel – Phosphorous Coatings | General Metal Finishing
For maximum accuracy, a minimum coating thickness of 75? The article is placed in a chamber and blasted with a heavy grit until all the deposit is removed.
The last must yield a numerical value and certain statistical requirements must be met. 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.
The use of a statistical regimen to establish the control limits and frequency of analysis may be employed to ensure quality deposits are produced. Applications include requirements for diffusion barrier, undercoat, electrical conductivity and wear and corrosion protection in specialized environments. The inspection lot is then classi? We will be happy to research it to see if our process meets your spec too!
Rejection and Rehearing The Electroless nickel processes in our plant are medium phosphorus electroless nickel aastm high phosphorus electroless nickel, where the main characters of this processes are: B — 04 Standard Speci?
As the voice of the U. Coatings aztm phosphorus contents greater than Typical environments would include acid solutions, elevated temperature and pressure, hydrogen sul? Test specimens are available from Taber. The corrosion resistance of the coating to a speci?
Electroless Nickel Coating
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. Fine cracks in the coating on the tension side of the bend are not an indication of poor adhesion. These solutions are heated and generally remove the deposit at a slower rate than nitric acid. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
They are used on beryllium and titanium parts for low stress properties. The surface of the coating shall be cleaned prior to testing see Note Avoid rapid heating and cooling of plated parts. A number in parentheses indicates the year of last reapproval. The instrument shall be calibrated with deposits plated in the same solution under the same conditions on magnetic steel. These coatings are used in electronic applications providing solderability, bondability, increased electrical conductivity, and resistance to strong alkali solutions.
This standard does not purport to address all of the safety concerns, if any, associated with its use. Base metal condition, undercoats, surface preparation, and post processing all have a signi?
Careful selection of the pre and post heat treatments are recommended. Thermal treatment for hardness enlargement. Rough, non uniform surfaces require thicker coatings than smooth surfaces to achieve maximum corrosion resistance and minimum porosity. NOTE 10—Usually, when a collection of coated parts the inspection lot 8. NOTE 2—The performance of the autocatalytic nickel coating depends to a large extent on the surface? ASTM B – standard The coefficient of friction and stress of deposit are also reduced in comparison to electro-plated bright nickel.
Then remove the part, air dry, and examine for rust spots, which indicate pores.